Original Papers

2024

  1. Nagaoka, T.; Matsui, Y.; Ogaki, T.; Ikeda, H.
    ChemPhotoChem, 2024, in press.
    "Dicyanomethylenated Diaryldihydropentalenediones that Vary Excited State Decay Rates without Changing Emission Wavelengths" Link

2022

  1. Nagaoka, T.; Matsui, Y.; Fuki, M.; Ogaki, T.; Ohta, E.; Kobori, Y.; Ikeda, H.
    ACS Omega, 2022, 7, 40363–40373.
    "Diphenyldihydropentalenediones: Wide Singlet–Triplet Energy Gap Compounds Possessing the Planarly-fixed Diene Subunit" Link
  2. Irii, S.; Ogaki, T.; Miyashita, H.; Nobori, K.; Ozawa, Y.; Abe, M.; Sato, H.; Ohta, E.; Matsui, Y.; Ikeda, H.
    Tetrahedron Lett., 2022, 101, 153913.
    "Remarkable Piezofluorochromism of an Organoboron Complex Containing [2.2]Paracyclophane" Link
  3. Matsui, Y.; Yokoyama, Y.; Ogaki, T.; Ishiharaguchi, K.; Niwa, A.; Ohta, E.; Saigo, M.; Miyata, K.; Onda, K.; Naito, H.; Ikeda, H.
    J. Mater. Chem. C, 2022, 10, 4607–4613.
    "Aggregation-induced Emission Active Thermally-activated Delayed Fluorescence Materials Possessing N-Heterocycle and Sulfonyl Groups "  Link

2021

  1. Kanoh, M.; Matsui, Y.; Honda, K.; Kokita, Y.; Ogaki, T.; Ohta, E.; Ikeda, H.
    J. Phys. Chem. B, 2021, 125, 4831–4837.
    "Elongation of Triplet Lifetime Caused by Intramolecular Energy Hopping in Diphenylanthracene Dyads Oriented to Undergo Efficient Triplet–Triplet Annihilation Upconversion"  Link
  2. Hayashi, Y.; Morimoto, A.; Maeda, T.; Enoki, T.; Ooyama, Y.; Matsui, Y.; Ikeda, H.; Yagi, S.
    New J. Chem., 2021, 45, 2264–2275.
    "Synthesis of novel π-extended D–A–D-type dipyrido[3,2-a:2’,3’-c]phenazine derivatives and their photosensitized singlet oxygen generation"  Link

2020

  1. Matsui, Y.; Kanoh, M.; Ogaki, T.; Ohta, E.; Ikeda, H.
    J. Photochem. Photobiol. A: Chem., 2020, 387, 112107.
    "Triplet–Triplet Annihilation-Photon Upconversion Employing an Adamantane-linked Diphenylanthracene Dyad Strategy" [Link]
  2. Matsui, Y.; Shimono, K.; Takae, K.; Namai, H.; Sera, T.; Ogaki, T.; Ohta, E.; Mizuno, K. Ikeda, H.
    ChemPhotoChem., 2020, 4, 168–172.
    "Rates of Ring Opening of Radical Cation Intermediates Govern Differences in Thermoluminescence between 1‐ and 2‐Naphthyl‐Substituted Methylenecyclopropanes" [Link]

2019

  1. Matsui, Y.; Kawaoka, S.; Nagashima, H.; Nakagawa, T.; Okamura, N.; Ogaki, T.; Ohta, E.; Akimoto, S.; Sato-Tomita, A.; Yagi, S.; Kobori, Y.; Ikeda, H.
    J. Phys. Chem. C, 2019, 123, 18813–18823.
    "Exergonic Intramolecular Singlet Fission of an Adamantane-Linked Tetracene Dyad via Twin Quintet Multiexcitons" [Link]
  2. Nishida, J.-i.; Kawakami, Y.; Yamamoto, S.; Matsui, Y.; Ikeda, H.; Hirao, Y.; Kawase, T.
    Eur. J. Org. Chem., 2019, 2019, 3735–3743.
    "Synthesis and Photophysical Studies of Dibenzophosphole Oxides with D–A–D Triad Structures" [Link]

2018

  1. Nagashima, H.; Kawaoka, S.; Akimoto, S.; Tachikawa, T.; Matsui, Y.; Ikeda, H.; Kobori, Y.
    J. Phys. Chem. Lett., 2018, 9, 5855–5861.
    "Singlet-Fission-Born Quintet State: Sublevel Selections and Trapping by Multiexciton Thermodynamics" [Link]
  2. Nagashima, H.; Kawaoka, S.; Matsui, Y.; Tachikawa, T.; Ikeda, H.; Kobori, Y.
    J. Photopolym. Sci. Technol., 2018, 31, 163–167.
    "Time-Resolved EPR Study on Singlet-Fission Induced Quintet Generation and Subsequent Triplet Dissociation in TIPS-Phenyl-Tetracene Aggregates" [Link]
  3. Kuramoto, Y.; Nakagiri, T.; Matsui, Y.; Ohta, E.; Ogaki, T.; Ikeda, H.
    Photochem. Photobiol. Sci., 2018, 17, 1157–1168.
    "A Leaning Amine–Ketone Dyad with a Nonconjugated Linker: Solvatofluorochromism and Dual Fluorescence Associated with Intramolecular Charge Transfer" [Link]
  4. Kita, Y.; Nishida, J.-i.; Nishida, S.; Matsui, Y.; Hirao, Y.; Ikeda, H.; Kawase, T.
    ChemPhotoChem, 2018, 2, 42–52.
    "Charge-transfer and Arrangement Effects on Delayed Photoluminescence from Phthalimide Co-crystals" [Link]
  5. Matsui, Y.; Shigemori, M.; Endo, T.; Mizuno, K.; Naito, H.; Ikeda, H.
    Res. Chem. Int., 2018, 44, 4765–4774.
    "Spectroscopic and Electrical Characterization of α,γ-Bisdiphenylene-β-phenylallyl Radical as an Organic Semiconductor" [Link]

2017

  1. Ando, N.; Fukazawa, A.; Kushida, T.; Shiota, Y.; Itoyama, S.; Yoshizawa, K.; Matsui, Y.; Kuramoto, Y.; Ikeda, H.; Yamaguchi, S.
    Angew. Chem. Int. Ed. 2017, 56, 12210–12214.
    "Photochemical Intramolecular C-H Addition of Dimesityl-(hetero)arylboranes via a [1,6]-Sigmatropic Rearrangement" [Link]
  2. Kimura, Y.; Kawajiri, I.; Ueki, M.; Morimoto, T.; Nishida, J.-i.; Ikeda, H.; Tanaka, M.; Kawase, T.
    Org. Chem. Front. 2017, 4, 743–749.
    "A new fluorophore displaying remarkable solvatofluorochromism and solid-state light emission, and serving as a turn-on fluorescent sensor for cyanide ions" [Link]
  3. Tanaka, M.; Muraoka, M.; Matsui, Y.; Ohta, E.; Ogaki, T.; Mizuno, K.; Ikeda, H.
    Photochem. Photobiol. Sci. 2017, 16, 845–853.
    "Cooperative Effects of o- and m-Methyl Groups on the Intramolecular Charge-Transfer Emission Properties of Dibenzoylmethanatoboron Difluorides" [Link]
  4. Ueki, M.; Kimura, Y.; Yamamoto, Y.; Nishida, J.-i.; Kitamura, C.; Tanaka, M.; Ikeda, H.; Kawase, T.
    Tetrahedron 2017, 73, 1170–1176. "3,14-Bis(4-formylphenyl)-17,17-di(n-pentyl)tetrabenzo[a,c,g,i]fluorene Showing Solvatochromism and Crystallochromism in Fluorescence" [Link].
  5. Ohta, E.; Uehara, H.; Han, Y.; Wada, K.; Noguchi, H.; Katoono, R.; Ishigaki, Y.; Ikeda, H.; Uosaki, K.; Suzuki, T.
    ChemPlusChem 2017, 82, 1043–1047.
    "Organic Molecular Layer with High Electrochemical Bistability: Synthesis, Structure, and Properties of a Dynamic Redox System with Lipoate Units for Binding to Au(111)" [Link]
  6. Matsui, Y.; Ikeda, T.; Takahashi, Y.; Kamata, M.; Akagi, M.; Ohya, Y.; Fujino, R.; Namai, H.; Ohta, E.; Ogaki, T.; Tero-Kubota, S.; Mizuno, K.; Ikeda, H.
    Asian J. Org. Chem. 2017, 6, 458–468.
    "Electron-Transfer Reactions Triggered by Uncharged or Cationic Photosensitizer: Methodology for Generation of o-Quinodimethane and Analysis of Back Electron-Transfer Process" [Link]
  7. Ogaki, T.; Ohta, E.; Oda, Y.; Sato, H.; Matsui, Y.; Kumeda, M.; Ikeda, H.
    Asian J. Org. Chem. 2017, 6, 290–296.
    "Intramolecular Triple Cyclization Strategy for Sila- and Oxa-analogues of Truxene with Long-lived Phosphorescence" [Link]
  8. Tanaka, M.; Muraoka, M.; Matsui, Y.; Ohta, E.; Sakai, A.; Ogaki, T.; Yoshimoto, Y.; Mizuno, K. Ikeda, H.
    ChemPhotoChem 2017, 1, 188–197.
    "Remarkable Solvatofluorochromism of a [2.2]Paracyclophane-Containing Organoboron Complex: A Large Stokes Shift Promoted by Excited State Intramolecular Charge Transfer" [Link]
  9. Matsui, Y.; Oishi, T.; Ohta, E.; Ikeda, H.
    J. Phys. Org. Chem., 2017, 30, e3636.
    "Adiabatic Process of Higher Electronically-Excited States: Luminescence from an Excited State Biradical Generated by Irradiation of Benzophenone-Substituted Cyclopropanes" [Link]

2016

  1. Matsui, Y.; Usui, K.; Ikeda, H.; Irle, S.
    RSC Adv. 2016, 6, 83368–83672.
    "Ab Initio and First Principles Theoretical Investigations of Triplet-Triplet Fluorescence in Trimethylenemethane Biradicals" [Link]
  2. Sagawa, T.; Ito, F.; Sakai, A.; Ogata, Y.; Tanaka, K.; Ikeda, H.
    Photochem. Photobiol. Sci. 2016, 15, 420–430.
    "Substituent-dependent Backward Reaction in Mechanofluorochromism of Dibenzoylmethanatoboron Difluoride Derivatives" [Link]
  3. Hachiya, S.; Hashizume, D.; Ikeda, H.; Yamaji, M.; Maki, S.; Niwa, H.; Hirano, T.
    J. Photochem. Photobiol. A: Chem. 2016, 331, 206–214.
    "Spectroscopic Properties of BF2 Complexes of N-(5-Phenyl-2-pyrazinyl)pivalamides Exhibiting Fluorescence in Solution and Solid State" [Link]
  4. Yamamoto, A.; Matsui, Y.; Ohta, E.; Ogaki, T.; Sato, H.; Furuyama, T.; Kobayashi, N.; Mizuno, K.; Ikeda, H.
    J. Photochem. Photobiol. A: Chem. 2016, 331, 48–55.
    "Formation of a Trithia[5]helicene in an Unexpected Photoreaction of a Methyl-substituted Bis(dithienylethenyl)thiophene through a Double Sequence of 6π-Electrocyclization/Aromatization (Dehydrogenation/Demethylation)" [Link]
  5. Yamamoto, A.; Matsui, Y.; Asada, T.; Kumeda, M.; Takagi, K.; Suenaga, Y.; Nagae, K.; Ohta, E.; Sato, H.; Koseki, S.; Naito, H.; Ikeda, H.
    J. Org. Chem. 2016, 81, 3168–3176.
    "Amorphous Solid Simulation and Trial Fabrication of the Organic Field-effect Transistor of Tetrathienonaphthalenes Prepared by Using Microflow Photochemical Reactions: A Theoretical Calculation-inspired Investigation" [Link]
  6. Sakai, A.; Ohta, E.; Matsui, Y.; Tsuzuki, S.; Ikeda, H.
    ChemPhysChem 2016, 17, 4033–4036.
    "Room-Temperature Phosphorescence of Crystalline Metal-free Organoboron Complex" [Link]
  7. Sekiguchi, R.; Kudo, S.; Kawakami, J.; Sakai, A.; Ikeda, H.; Nakamura, H.; Ohta, K.; Ito, S.
    Bull. Chem. Soc. Jpn. 2016, 89, 1260–1275.
    "Preparation of a Cyclic Polyphenylene Array for a Chiral-Type Carbon Nanotube Segment" [Link]
  8. Kojima, T.; Kawajiri, I.; Nishida, J.-i.; Kitamura, C.; Kurata, H.; Tanaka, M.; Ikeda, H.; Kawase, T.
    Bull. Chem. Soc. Jpn. 2016, 89, 931–940.
    "2,3-Diphenylphenanthro[9,10-b]furan Derivatives as New Blue Fluorophores" [Link]

2015

  1. Ohta, E.; Kobayashi, H.; Sakai, A.; Matsui, Y.; Sato, H.; Ikeda, H.
    Rapid Commun. Photosci. 2015, 4, 31–33.
    "Fluorescence Behavior Associated with a Possible Intercolumnar Charge-transfer Interaction in the Crystalline State of a Dyad Consisting of Mesitylene and 1,4-Dicyano-2-methylnaphthalene Subunits" [Link]
  2. Yamamura, M.; Yazaki, S.; Seki, M.; Matsui, Y.; Ikeda, H.; Nabeshima, T.
    Org. Biomol. Chem. 2015, 13, 2574–2581.
    "A Facile and High-yield Formation of Dipyrrin–Boronic Acid Dyads and Triads: A Light-harvesting System in the Visible Region Based on the Efficient Energy Transfer" [Link]
  3. Sekiguchi, R.; Takahashi, K.; Kawakami, J.; Sakai, A.; Ikeda, H.; Ishikawa, A.; Ohta, K.; Ito, S.
    J. Org. Chem. 2015, 80, 5092–5110.
    "Preparation of a Cyclic Polyphenylene Array for a Zigzag-type Carbon Nanotube Segment" [Link]
  4. Natori, K.; Iwayama, T.; Yamabe, O.; Kitamoto, Y.; Ikeda, H.; Sakamoto, K.; Hattori, T.; Miyano, S.
    Chirality 2015, 27, 479–486.
    "Photoracemization of Blestriarene C and Its Analogs" [Link]
  5. Sakai, A.; Ohta, E.; Yoshimoto, Y.; Tanaka, M.; Matsui, Y.; Mizuno, K.; Ikeda, H.
    Chem. Eur. J. 2015, 21, 18128–18137. (selected as a "Hot Paper")
    "New Fluorescence Domain “Excited Multimer” Formed upon Photoexcitation of Continuously Stacked Diaroylmethanatoboron Difluoride Molecules with Fused π-Orbital in Crystals" [Link]
  6. Toyao, T.; Ueno, N.; Miyahara, K.; Matsui, Y.; Kim, T.-H.; Horiuchi, Y.; Ikeda, H.; Matsuoka, M.
    Chem. Commun. 2015, 51, 16103–16106.
    "Visible-light, Photoredox Catalyzed, Oxidative Hydroxylation of Arylboronic Acids Using a Metal-organic Framework Containing Tetrkis(carboxyphenyl)porphyrin Groups" [Link]

2014

  1. Kuramoto, Y.; Matsui, Y.; Ohta, E.; Sato, H.; Ikeda, H.
    Tetrahedron Lett. 2014, 55, 4366–4369.
    "Unexpected Formation of a Phenonium Ion-containing Salt by Single Electron-transfer Oxidation of a Cage Compound Possessing Triphenylamine Moieties" [Link]
  2. Ogaki, T.; Ohta, E.; Yamamoto, A.; Sato, H.; Mizuno, K.; Ikeda, H.
    Tetrahedron Lett. 2014, 55, 4269–4273.
    "One-pot Photochemical Synthesis of Novel Thienobis[1]benzothiophene with an Angularly-fused Structure that Promotes Unique Intermolecular S•••S Contacts in the Crystalline State" [Link]
  3. Mizuno, K.; Negoro, N.; Nagayama, Y.; Maeda, H.; Ikeda, H.
    Photochem. Photobiol. Sci. 2014, 13, 145–148.
    "Formation of a New Benzotriquinane Skeleton via Intramolecular Photocycloaddition Reactions of a Phenylethynes Moiety to a 1-Cyanonaphthalene Ring System" [Link]
  4. Aoki, Y.; Matsuki, N.; Mori, T.; Ikeda, H.; Inoue, Y.
    Org. Lett. 2014, 16, 4888–4891.
    "Exciplex Ensemble Modulated by Excitation Mode in Intramolecular Charge-transfer Dyad: Effects of Temperature, Solvent Polarity, and Wavelength on Photochemistry and Photophysics of Tethered Naphthalene–Dicyanoethene System" [Link]
  5. Ohta, E.; Ogaki, T.; Aoki, T.; Ikeda, H.
    Chem. Lett. 2014, 43, 755–757.
    "Theoretical Study Demonstrating that Silylene Bridging Brings about LUMO Energy Lowering without Increasing the Reorganization Energy for Single Electron Transfer" [Link]
  6. Kojima, T.; Yokota, R.; Kitamura, C.; Kurata, H.; Tanaka, M.; Ikeda, H.; Kawase, T.
    Chem. Lett. 2014, 43, 696–698.
    "Pyreno[4,5-b]furan and -[4,5-b:9,10-b']difuran Derivatives as New Blue Fluorophores: Synthesis, Structure, and Electronic Properties" [Link]
  7. Matsui, Y.; Kido, T.; Ohta, E.; Ikeda, H.
    Chem. Commun. 2014, 50, 13963–13966.
    "The “Excited State C–C Bond Cleavage—Luminescence” Phenomenon of a Biphenyl-substituted Methylenecyclopropane Triggered by Intermolecular Energy Transfer from Triplet Benzophenone" [Link]

2013

  1. Tanaka, M.; Ohta, E.; Sakai, A.; Yoshimoto, Y.; Mizuno, K.; Ikeda, H.
    Tetrahedron Lett. 2013, 54, 4380–4384.
    "Remarkable Difference in Fluorescence Lifetimes of the Crystalline States of Dibenzoylmethanatoboron Difluoride and Its Diisopropyl Derivative" [Link]
  2. Yamamoto, A.; Ohta, E.; Kishigami, N.; Tsukahara, N.; Tomiyori, Y.; Sato, H.; Matsui, Y.; Kano, Y.; Mizuno, K.; Ikeda, H.
    Tetrahedron Lett. 2013, 54, 4049–4053.
    "Synthesis and Basic Properties of Tetrathieno[2,3-a:3′,2′-c:2″,3″-f:3‴,2‴-h]naphthalene: A New π-Conjugated System Obtained by Photoinduced Electrocyclization–Dehydrogenation Reactions of Tetra(3-thienyl)ethene" [Link]
  3. Matsui, Y.; Kawahara, D.; Ohta, E.; Ikeda, H.
    Phys. Chem. Chem. Phys. 2013, 15, 7064–7069.
    "The Lifetime and Efficiency of Triplet–Triplet Fluorescence from the Excited State of a TMM Biradical Determined Using Transient Emission Spectroscopy on Two-color Two-laser Flash Photolysis" [Link]
  4. Rahman, M. J.; Shimizu, H.; Araki, Y.; Ikeda, H.; Iyoda, M.
    Chem. Commun. 2013, 49, 9251–9253.
    "Synthesis of Pentadecaphenylenes, Their Inclusion Properties, and Nanostructure Formation with C60" [Link]
  5. Ueda, Y.; Tanigawa, Y.; Kitamura, C.; Ikeda, H.; Yoshimoto, Y.; Tanaka, M.; Mizuno, K.; Kurata, H.; Kawase, T.
    Chem. Asian J. 2013, 8, 392–399.
    "3,14-Bis(p-nitrophenyl)-17,17-dipentyltetrabenzo[a,c,g,i]-fluorene: A New Fluorophore Displaying Both Remarkable Solvatochromism and Crystalline-induced Emission" [Link]

2012

  1. Sakai, A.; Tanaka, M.; Ohta, E.; Yoshimoto, Y.; Mizuno, K.; Ikeda, H.
    Tetrahedron Lett. 2012, 53, 4138–4141.
    "White Light Emission from a Single Component System: Remarkable Concentration Effects on the Fluorescence of 1,3-Diaroylmethanatoboron Difluoride" [Link]
  2. Kano, Y.; Tanaka, F.; Ohta, E.; Mizuno, K.; Ikeda, H.
    Tetrahedron 2012, 68, 5564–5571.
    "DFT Studies of Unique Stereoelectronic Effects of Substituents on Divergent Reaction Pathways of Methylenecyclobutanone Radical Cations" (full paper) [Link]

2011

  1. Kano, Y.; Mizuno, K.; Ikeda, H.
    J. Phys. Org. Chem. 2011, 24, 921–928.
    "Density Functional Theory Study of Silole-fused Tetramethyleneethane Biradicals with Orbital Interactions" (invited full paper) [Link]
  2. Imoto, M.; Matsui, Y.; Takeda, M.; Tamaki, A.; Taniguchi, H.; Mizuno, K.; Ikeda, H.
    J. Org. Chem. 2011, 76, 6356–6361.
    "A Probable Hydrogen-bonded Meisenheimer Complex: An Unusually High SNAr Reactivity of Nitroaniline Derivatives with Hydroxide Ion in Aqueous Media" (full paper) [Link]
  3. Matsui, Y.; Namai, H.; Akimoto, I.; Kan'no, K.-i.; Mizuno, K.; Ikeda, H.
    Tetrahedron 2011, 67, 7431–7439.
    "Twisted Molecular Geometry and Localized Electronic Structure of the Triplet Excited gem-Diphenyltrimethylenemethane Biradical: Substituent Effects on Thermoluminescence and Related Theoretical Calculations" (full paper) [Link]
  4. Ikeda, H.; Matsuo, K.; Matsui, Y.; Matsuoka, M.; Mizuno, K.
    Bull. Chem. Soc. Jpn. 2011, 84, 537–543.
    "Design, Generation, and Characterization of a 1,5-Hexadiene Bearing Two Lophyl Radicals as a Probe of the Stepwise Mechanism for the Cope Rearrangement" (full paper) [Link]

2010年以前

  1. Ikeda, H.; Matsui, Y.; Akimoto, I.; Kan'no, K.-i.; Mizuno, K.
    Aust. J. Chem. 2010, 63, 1342–1347.
    "X-Ray-triggered Thermoluminescence and DFT Characterization of gem-Diphenyltrimethylenemethane Biradical" (Invited full paper) [Link]
  2. Imoto, M.; Ikeda, H.; Ohashi, M.; Takeda, M.; Tamaki, A.; Taniguchi, H.; Mizuno, K.
    Tetrahedron Lett. 2010, 51, 5877–5880.
    "Control of the CT Interaction between Electron-donor and -acceptor Moieties of a 1,4-Dicyanonaphthalene—Arene Dyad for Intermolecular Exciplex or Excimer Formation in Crystals" [Link]
  3. Imoto, M.; Ikeda, H.; Fujii, T.; Taniguchi, H.; Tamaki, A.; Takeda, M.; Mizuno, K.
    Org. Lett. 2010, 12, 1940–1943.
    "Contrasting Intermolecular and Intramolecular Exciplex Formation of a 1,4-Dicyano-2-methylnaphthalene—N,N-Dimethyl-p-toluidine Dyad" [Link]
  4. Hirano, T.; Sekiguchi, T.; Hashizume, D.; Ikeda, H.; Maki, S.; Niwa, H.
    Tetrahedron 2010, 66, 3842–3848.
    "Colorimetric and Fluorometric Sensing of the Lewis Acidity of a Metal Ion by Metal-ion Complexation of Imidazo[1,2-a]pyrazin-3(7H)-ones" (full paper) [Link]
  5. Ohashi, M.; Kano, Y.; Ikeda, H.; Mizuno, K.
    Tetrahedron 2010, 66, 3770–3774.
    "Effects of Magnesium Salts on Photoinduced Electron Transfer Reaction between Ammonia, 2,5-Dimethyl-2,4-hexadiene, and 9-Cyanoanthracene" (full paper) [Link]
  6. Ikeda, H.; Kawabe, A.; Sakai, A.; Namai, H.; Mizuno, K.
    Res. Chem. Intermed. 2009, 35, 893–908.
    "Photochromic Behavior of Tetrathienylethene in Condensed Systems. Attempts to Control 1,2-Dyotropic Rearrangement of the Closed Isomer" (Invited full paper) [Link]
  7. Barth, I.; Hege, H.-C.; Ikeda, H.; Kenfack, A.; Koppitz, M.; Manz, J.; Marquardt, F.; Paramonov, G. K.
    Chem. Phys. Lett. 2009, 481, 118–123.
    "Concerted Quantum Effects of Electronic and Nuclear Fluxes in Molecules" [Link]
  8. Suzuki, T.; Ishigaki, Y.; Iwai, T.; Kawai, H.; Fujiwara, K.; Ikeda, H.; Kano, Y.; Mizuno, K.
    Chem. Eur. J. 2009, 15, 9434–9441.
    "Multi-input/Multi-output Molecular Response System Based on the Dynamic Redox Behavior of 3,3,4,4-Tetraaryldihydro[5]helicene Derivatives: Reversible Formation/Destruction of Chiral Fluorophore and Modulation of Chiroptical Properties by Solvent Polarity" (full paper) [Link]
  9. Kudoh, M.; Satoh, T.; Ikeda, H.; Nakazawa, T.; Miyashi, T.; Katagiri, S.; Sudoh, S.
    Bull. Chem. Soc. Jpn. 2009, 82, 70–75.
    "Experimental and Computational Studies on the Dipole Moments of Annulated-tropones and 1,4-Polyacenequinones" (full paper) [Link]
  10. Hirano, T.; Takahashi, Y.; Kondo, H.; Maki, S.; Kojima, S.; Ikeda, H.; Niwa, H.
    Photochem. Photobiol. Sci. 2008, 7, 197–207.
    "The Reaction Mechanism for the High Quantum Yield of the Cypridina (Vargula) Bioluminescence Supported by Chemiluminescence of 6-Aryl-2-methylimidazo[1,2-a]pyrazin-3(7H)-ones (Cypridina Luciferin Analogues)" (full paper) [Link]
  11. Ikeda, H.; Sakai, A.; Kawabe, A.; Namai, H.; Mizuno, K.
    Tetrahedron Lett. 2008, 49, 4972–4976.
    "Photochromic Properties of Tetrakis(2-methylthien-3-yl)ethene and its Tetrakis(methylthio) Derivative" [Link]
  12. Ikeda, T.; Ikeda, H.; Takahashi, Y.; Yamada, M.; Mizuno, K.; Tero-Kubota, S.; Yamauchi, S.
    J. Am. Chem. Soc. 2008, 130, 2466–2472.
    "The Facile Generation of a Tetramethyleneethane Type Radical Cation and Biradical Utilizing a 3,4-Di(α-styryl)furan and a Photoinduced ET and Back ET Sequence" (full paper) [Link]
  13. Ikeda, H.; Sakai, A.; Namai, H.; Kawabe, A.; Mizuno, K.
    Tetrahedron Lett. 2007, 48, 8338–8342.
    "Synthesis, X-Ray Crystallographic Analysis, and Theoretical Structure Analysis of Tetrathienylethenes Designed for Photo- and Electrochromism" [Link]
  14. Ikeda, H.; Hoshi, Y.; Namai, H.; Tanaka, F.; Goodman, J. L.; Mizuno, K.
    Chem. Eur. J. 2007, 13, 9207–9215.
    "Evidence for Significant Through-space and Through-bond Electronic Coupling in the 1,4-Diphenylcyclohexane-1,4-diyl Radical Cation Gained by Absorption Spectroscopy and DFT Calculations" (full paper) [Link]
  15. Namai, H.; Ikeda, H.; Hoshi, Y.; Mizuno, K.
    Angew. Chem. Int. Ed. 2007, 46, 7396–7398.
    "Thermoluminescence Originating from the Singlet Excited State of 1,4-Diarylcyclohexane-1,4-diyls: A Potentially General Strategy for the Observation of Short-lived Biradicals" [Link]
  16. Namai, H.; Ikeda, H.; Hirano, T.; Ishii, H.; Mizuno, K.
    J. Phys. Chem. A 2007, 111, 7898–7905.
    "Spectroscopic and Density Functional Theory Studies of the Molecular Geometry and Electronic Structure of Classical and Nonclassical Radical Ions Derived from 7-Benzhydrylidenenorbornene Analogues" (full paper) [Link]
  17. Namai, H.; Ikeda, H.; Hoshi, Y.; Kato, N.; Morishita, Y.; Mizuno, K.
    J. Am. Chem. Soc. 2007, 129, 9032–9036.
    "Thermoluminescence and a New Organic Light-emitting Diode (OLED) Based on Triplet—Triplet Fluorescence of the Trimethylenemethane (TMM) Biradical" (full paper) [Link]
  18. Namai, H.; Ikeda, H.; Kato, N.; Mizuno, K.
    J. Phys. Chem. A 2007, 111, 4436–4442.
    "Substituent Effects on the Energies of the Electronic Transitions of Geminally Diphenyl-substituted Trimethylenemethane (TMM) Radical Cations. Experimental and Theoretical Evidence for a Twisted Molecular and Localized Electronic Structure" (full paper) [Link]
  19. Takahashi, Y.; Kondo, H.; Maki, S.; Niwa, H.; Ikeda, H.; Hirano, T.
    Tetrahedron Lett. 2006, 47, 6057–6061.
    "Chemiluminescence of 6-Aryl-2-methylimidazo[1,2-a]pyrazin-3(7H)-ones in DMSO/TMG and in Diglyme/acetate Buffer: Support for the Chemiexcitation Process to Generate the Singlet-excited State of Neutral Oxyluciferin in a High Quantum Yield in the Cypridina (Vargula) Bioluminescence Mechanism" [Link]
  20. Hasegawa, E.; Takizawa, S.; Seida, T.; Yamaguchi, A.; Yamaguchi, N.; Chiba, N.; Takahashi, T.; Ikeda, H.; Akiyama, K.
    Tetrahedron 2006, 62, 6581–6588.
    "Photoinduced Electron-transfer Systems Consisting of Electron-donating Pyrenes or Anthracenes and Benzimidazolines for Reductive Transformation of Carbonyl Compounds" (full paper) [Link]
  21. Mori, K.; Maki, S.; Niwa, H.; Ikeda, H.; Hirano, T.
    Tetrahedron 2006, 62, 6272–6288.
    "Real Light Emitter in the Bioluminescence of the Calcium-activated Photoproteins Aequorin and Obelin: Light Emission from the Singlet-excited State of Coelenteramide Phenolate Anion in a Contact Ion Pair" (full paper) [Link]
  22. Inada, T.; Funasaka, Y.; Kikuchi, K.; Takahashi, Y.; Ikeda, H.
    J. Phys. Chem. A 2006, 110, 2595–2600.
    "Electron-Transfer Fluorescence Quenching of Aromatic Hydrocarbons by Europium and Ytterbium Ions in Acetonitrile" (full paper) [Link]
  23. Ikeda, H.; Namai, H.; Kato, N.; Ikeda, T.
    Tetrahedron Lett. 2006, 47, 1857–1860.
    "Matrix Isolation and DFT Calculations for the TMM Radical Cation Generated via the Single Electron Oxidation of a Methylenecyclopropane" [Link]
  24. Ikeda, H.; Namai, H.; Kato, N.; Ikeda, T.
    Tetrahedron Lett. 2006, 47, 1501–1504.
    "The First Observation in an Organic Medium and DFT Calculation of the TMM Radical Anion Generated via a Single Electron Reduction of a Methylenecyclopropane" [Link]
  25. Hasegawa, E.; Seida, T.; Chiba, N.; Takahashi, T.; Ikeda, H.
    J. Org. Chem. 2005, 70, 9632–9635.
    "Contrastive Photoreduction Pathways of Benzophenones Governed by Regiospecific Deprotonation of Imidazoline Radical Cations and Additive Effects" [Link]
  26. Kondo, H.; Igarashi, T.; Maki, S.; Niwa, H.; Ikeda, H.; Hirano, T.
    Tetrahedron Lett. 2005, 46, 7701–7704.
    "Substituent Effects on the Kinetics for the Chemiluminescence Reaction of 6-Arylimidazo[1,2-a]pyrazin-3(7H)-ones (Cypridina Luciferin Analogues): Support for the Single Electron Transfer (SET)-Oxygenation Mechanism with Triplet Molecular Oxygen" [Link]
  27. Ikeda, H.; Namai, H.; Hirano, T.
    Tetrahedron Lett. 2005, 46, 7631–7635.
    "Spectroscopic and DFT Studies of Nonclassical and Classical Radical Cations of 7-Benzhydrylidenenorbornene Analogues: Contrasting Molecular Geometry and Electronic Structures Originating from the Different Patterns of Electronic Coupling" [Link]
  28. Ikeda, H.; Nomura, T.; Akiyama, K.; Oshima, M.; Roth, H. D.; Tero-Kubota, S.; Miyashi, T.
    J. Am. Chem. Soc. 2005, 127, 14497–14504.
    "Divergent Oxidative Rearrangements in Solution and in a Zeolite: Distal vs Proximal Bond Cleavage of Methylenecyclopropanes" (full paper) [Link]
  29. Takamuki, Y.; Maki, S.; Niwa, H.; Ikeda, H.; Hirano, T.
    Tetrahedron 2005, 61, 10073–10080.
    "Substituent Effects on the Spectroscopic Properties of Solvatochromic 2-Phenylimidazo[1,2-a]pyrazin-3(7H)-ones: An Effective Control for the Colorimetric Sensor Properties" (full paper) [Link]
  30. Ikeda, H.; Namai, H.; Taki, H.; Miyashi, T.
    J. Org. Chem. 2005, 70, 3806–3813.
    "An Evolved Explanation for the Molecular Geometry and Electronic Structure of Diphenyl-substituted Cyclic Trimethylenemethane (TMM): A Nearly Planar Conformation with a Considerably Localized Electronic State" (full paper) [Link]
  31. Ikeda, H.; Namai, H.; Hirano, T.
    Tetrahedron Lett. 2005, 46, 3917–3921.
    "Spectroscopic and DFT Evidence for a Nonclassical Radical Cation Derived from 7-Benzhydrylidenenorbornene" [Link]
  32. Ikeda, H.; Tanaka, F.; Kabuto, C.
    Tetrahedron Lett. 2005, 46, 3863–3866.
    "Significant Solvent Effects and Unusual Additions of p-Chloranil in the Photoinduced Electron-transfer Reaction of 2,2-Dianisyl-4-isopropylidene-3,3-dimethylcyclobutanone" [Link]
  33. Ikeda, H.; Tanaka, F.; Kabuto, C.
    Tetrahedron Lett. 2005, 46, 2663–2667.
    "Chemical Capture of an Unprecedented Oxatetramethyleneethane Radical Cation with a Through-space Electronic Coupling" [Link]
  34. Ikeda, H.; Ikeda, T.; Akagi, M.; Namai, H.; Miyashi, T.; Takahashi, Y.; Kamata, M.
    Tetrahedron Lett. 2005, 46, 1831–1835.
    "Direct Observation and Kinetic Characterization of o-Quinodimethane and Its Radical Cation Variant Generated in a Photoinduced Electron-transfer Reaction of 1,2-Bis(α-styryl)benzene" [Link]
  35. Ikeda, H.; Minegishi, T.; Miyashi, T.; Lakkaraju, P. S.; Sauers, R. R.; Roth, H. D.
    J. Phys. Chem. B 2005, 109, 2504–2511.
    "Incorporation of 2-Arylhexa-1,5-diene into Pentasil Zeolite: A Distorted 1-Arylcyclohexane-1,4-diyl Radical Cation at Room Temperature" (full paper) [Link]
  36. Takamuki, Y.; Maki, S.; Niwa, H.; Ikeda, H.; Hirano, T.
    Chem. Lett. 2004, 33, 1484–1485.
    "Substituent Effects on the Solvatochromism of 2-Phenylimidazopyrazinones: Effective Control of the Color Variation Range and Sensitivity toward Indication of the Proton Donor Ability of Solvents by an Electron-withdrawing Group Substitution" [Link]
  37. Fujio, S.; Hashizume, D.; Takamuki, Y.; Yasui, M.; Iwasaki, F.; Maki, S.; Niwa, H.; Ikeda, H.; Hirano, T.
    Tetrahedron Lett. 2004, 45, 8531–8534.
    "Regioselective Phenyl-substitution Effects on the Solvatochromism of 2-Phenylimidazo[1,2-a]pyrazin-3(7H)-one Derivatives: Expansion of the Color Variation Range of a Visible Indicator for the Proton Donor Ability of Solvents" [Link]
  38. Ikeda, H.; Tanaka, F.; Miyashi, T.; Akiyama, K.; Tero-Kubota, S.
    Eur. J. Org. Chem. 2004, 2004, 1500–1508.
    "Photoinduced Electron-transfer, Pyrolyses, and Direct Irradiation Reactions of 2-Methylenecyclobutanones: Regioselective Bond Cleavage Depends on the Substituents and Method of Activation" (full paper) [Link]
  39. Ikeda, H.; Hoshi, Y.; Kikuchi, Y.;Tanaka, F.; Miyashi, T.
    Org. Lett. 2004, 6, 1029–1032.
    "Photoinduced Electron-transfer Bicyclopropenyl-benzene Rearrangements of 2,2',3,3'-Tetraphenylbicyclopropenyls: A New Mechanism via Dewar Benzene" [Link]
  40. Ikeda, H.; Tanaka, F.; Akiyama, K.; Tero-Kubota, S.; Miyashi, T.
    J. Am. Chem. Soc. 2004, 126, 414–415.
    "Rearrangement of a 2-Methylenecyclobutan-1-one Derivative Triggered by Photoinduced Electron Transfer: An Unprecedented Oxa Analogue of the Tetramethyleneethane Radical Cation" [Link]
  41. Sekiguchi, T.; Maki, S.; Niwa, H.; Ikeda, H.; Hirano, T.
    Tetrahedron Lett. 2004, 45, 1065–1069.
    "Metal-ion Complexation of Imidazo[1,2-a]pyrazin-3(7H)-ones: Continuous Changes in Absorption Spectra of Complexes Depending on the Lewis Acidity of the Metal Ion" [Link]
  42. Ikeda, H.; Akiyama, K.; Takahashi, Y.; Nakamura, T.; Ishizaki, S.; Shiratori, Y.; Ohaku, H.; Goodman, J. L.; Houmam, A.; Wayner, D. D. M.; Tero-Kubota, S.; Miyashi, T.
    J. Am. Chem. Soc. 2003, 125, 9147–9157.
    "Spectroscopic and Calorimetric Studies on the Mechanism of Methylenecyclopropane Rearrangements Triggered by Photoinduced Electron Transfer" (full paper) [Link]
  43. Inada, T.; Kikuchi, K.; Takahashi, Y.; Ikeda, H.; Miyashi, T.
    J. Phys. Chem. A 2002, 106, 4345–4349.
    "Electron-transfer (ET) Fluorescence Quenching in Benzonitrile. Evidence of an Intermolecular ET with ΔG < –0.5 eV being a Diffusion-controlled Process" (full paper) [Link]
  44. Ikeda, H.; Hoshi, Y.; Miyashi, T.
    Tetrahedron Lett. 2001, 42, 8485–8488.
    "1,3-Bis(4-methoxyphenyl)cyclohexane-1,3-diyl Cation Radical: Change of Reactivity Depending upon One-electron Oxidation Conditions" [Link]
  45. Ikeda, H.; Aburakawa, N.; Tanaka, F.; Fukushima, T.; Miyashi, T.
    Eur. J. Org. Chem. 2001, 2001, 3445–3452.
    "Photosensitized Electron-transfer Reactions of 1-Isopropylidene-2-methylene-3,3-diphenylcyclobutane — [4+4] Cycloaddition and Cyclodimerization Initiated by a Buta-1,3-diene Radical Cation Functionality" (full paper) [Link]
  46. Inada, T. N.; Kikuchi, K.; Takahashi, Y.; Ikeda, H.; Miyashi, T.
    J. Photochem. Photobiol. A. Chem. 2000, 137, 93–97.
    "A Comparative Study on Electron-transfer Fluorescence Quenching by Aliphatic and Aromatic Amines" (full paper) [Link]
  47. Inada, T. N.; Miyazawa, C. S.; Kikuchi, K.; Yamauchi, M.; Nagata, T.; Takahashi, Y.; Ikeda, H.; Miyashi, T.
    J. Am. Chem. Soc. 1999, 121, 7211–7219.
    "Effects of Molecular Charge on Photoinduced Electron-transfer Reactions" (full paper) [Link]
  48. Ikeda, H.; Takasaki, T.; Takahashi, Y.; Konno, A.; Matsumoto, M.; Hoshi, Y.; Aoki, T.; Suzuki, T.; Goodman, J. L.; Miyashi, T.
    J. Org. Chem. 1999, 64, 1640–1649.
    "Photoinduced Electron-transfer Cope Rearrangements of 3,6-Diaryl-2,6-octadienes and 2,5-Diaryl-3,4-dimethyl-1,5-hexadienes: Stereospecificity and an Unexpected Formation of the Bicyclo[2.2.0]hexane Derivatives" (full paper) [Link]
  49. Ikeda, H.; Nakamura, T.; Miyashi, T.; Goodman, J. L.; Akiyama, K.; Tero-Kubota, S.; Houmam, A.; Wayner, D. D. M.
    J. Am. Chem. Soc. 1998, 120, 5832–5833.
    "Direct Observation of Two Different Types of TMM Intermediates in the Photoinduced Electron-transfer Degenerate Methylenecyclopropane Rearrangement" [Link]
  50. Ikeda, H.; Minegishi, T.; Abe, H.; Konno, A.; Goodman, J. L.; Miyashi, T.
    J. Am. Chem. Soc. 1998, 120, 87–95.
    "Photoinduced Electron-transfer Degenerate Cope Rearrangement of 2,5-Diaryl-1,5-hexadienes: A Cation-radical Cyclization—Diradical Cleavage Mechanism" (full paper) [Link]
  51. Sato, C.; Kikuchi, K.; Ishikawa, H.; Iwahashi, M.; Ikeda, H.; Takahashi, Y.; Miyashi, T.
    Chem. Phys. Lett. 1997, 276, 210–216.
    "Fluorescence Quenching of Aromatic Molecules by SCN in Acetonitrile: Effect of Molecular Size on Electron Transfer Fluorescence Quenching" [Link]
  52. Ikeda, H.; Ishida, A.; Takasaki, T.; Tojo, S.; Takamuku, S.; Miyashi, T.
    J. Chem. Soc., Perkin Trans. 2 1997, 849–850.
    "The Kinetically-controlled Cope Rearrangement of 2,5-Bis(4-methoxyphenyl)hexa-1,5-dienes Induced by Photosensitised Electron Transfer" [Link]
  53. Takahashi, Y.; Ohaku, H.; Nishioka, N.; Ikeda, H.; Miyashi, T.; Gormin, D. A.; Hilinski, E. F.
    J. Chem. Soc., Perkin Trans. 2 1997, 303–308.
    "Charge-transfer Excitation of Electron—Donor—Acceptor Complexes of Arylcyclopropanes" [Link]
  54. Takahashi, Y.; Miyamoto, K.; Sakai, K.; Ikeda, H.; Miyashi, T.; Ito, Y.; Tabohashi, K.
    Tetrahedron Lett. 1996, 37, 5547–5550.
    "Electrocycloreversion of Benzocyclobutenols Promoted by Photoinduced Electron Transfer" [Link]
  55. Ikeda, H.; Minegishi, T.; Takahashi, Y.; Miyashi, T.
    Tetrahedron Lett. 1996, 37, 4377–4380.
    "Phenyl Substitution Effects on Rate Acceleration of Cation Radical Deazetation of 2,3-Diazabicyclo[2.2.2]oct-2-enes" [Link]
  56. Takahashi, Y.; Nishioka, N.; Endoh, F.; Ikeda, H.; Miyashi, T.
    Tetrahedron Lett. 1996, 37, 1841–1844.
    "Phenylcyclopropane Cation Radical Revisited: Generation, Direct Observation and Determination of the Rates of Nucleophilic Capture" [Link]
  57. Takahashi, Y.; Ohaku, H.; Morishima, S.-i.; Suzuki, T.; Ikeda, H.; Miyashi, T.
    J. Chem. Soc., Perkin Trans. 1 1996, 319–325.
    "Photoinduced Skeletal Rearrangement of 1,1-Diarylspiropentanes" [Link]
  58. Takahashi, Y.; Ohya, Y.; Ikeda, H.; Miyashi, T.
    J. Chem. Soc., Chem. Commun. 1995, 1749–1750.
    "Generation of an o-Xylylene: Electrocyclization of 1,2-Bis(1-phenylvinyl)benzene Promoted by Photoinduced Electron Transfer" [Link]
  59. Ikeda, H.; Minegishi, T.; Miyashi, T.
    J. Chem. Soc., Chem. Commun. 1994, 297–298.
    "Striking Contrast between Photoinduced and Non-photoinduced Electron-transfer Reactions of 1,4-Diphenyl-2,3-diazabicyclo[2.2.2]oct-2-ene" [Link]
  60. Kikuchi, K.; Sato, C.; Watanabe, M.; Ikeda, H.; Takahashi, Y.; Miyashi, T.
    J. Am. Chem. Soc. 1993, 115, 5180–5184.
    "New Aspects on Fluorescence Quenching by Molecular Oxygen" (full paper) [Link]
  61. Kikuchi, K.; Niwa, T.; Takahashi, Y.; Ikeda, H.; Miyashi, T.
    J. Phys. Chem. 1993, 97, 5070–5073.
    "Quenching Mechanism in a Highly Exothermic Region of the Rehm–Weller Relationship for Electron-transfer Fluorescence Quenching" (full paper) [Link]
  62. Ikeda, H.; Oikawa, T.; Miyashi, T.
    Tetrahedron Lett. 1993, 34, 2323–2326.
    "Substitution Effects on Regioselective Cyclizations of 1,5- and 2,4-Diphenyl-1,5-hexadiene Cation Radicals Generated by the Electron-transfer Photosensitizations" [Link]
  63. Ikeda, H.; Takasaki, T.; Takahashi, Y.; Miyashi, T.
    J. Chem. Soc., Chem. Commun. 1993, 367–369.
    "The Cation-radical Cope Rearrangement of 2,5-Diphenylhexa-1,5-dienes under Electron Ionization" [Link]
  64. Kikuchi, K.; Katagiri, T.; Niwa, T.; Takahashi, Y.; Suzuki, T.; Ikeda, H.; Miyashi, T.
    Chem. Phys. Lett. 1992, 193, 155–160.
    "Evidence for Generation of Electronically Excited Radical Ion in Very Exothermic Electron-transfer Fluorescence Quenching" [Link]
  65. Hasegawa, E.; Okada, K.; Ikeda, H.; Yamashita, Y.; Mukai, T.
    J. Org. Chem. 1991, 56, 2170–2178.
    "Photosensitized [2+2] Cycloreversion Reaction of Arylated Cage Compounds in Nonpolar Solvents. Highly Efficient Adiabatic Exciplex Isomerization" (full paper) [Link]
  66. Miyashi, T.; Takahashi, Y.; Ohaku, H.; Ikeda, H.; Morishima, S.-i.
    Pure Appl. Chem. 1991, 63, 223–230.
    "Electron-transfer Photoreactions of Small-ring Compounds: Nature and Role of Cation Radical Intermediates" [Link]
  67. Miyashi, T.; Ikeda, H.; Konno, A.; Okitsu, O.; Takahashi, Y.
    Pure Appl. Chem. 1990, 62, 1531–1538.
    "Photoinduced Electron-transfer Reactions of the Cope and Related Systems" [Link]
  68. Kikuchi, K.; Niwa, T.; Takahashi, Y.; Ikeda, H.; Miyashi, T.; Hoshi, M.
    Chem. Phys. Lett. 1990, 173, 421–424.
    "Evidence of Exciplex Formation in Acetonitrile" [Link]
  69. Kikuchi, K.; Takahashi, Y.; Koike, K.; Wakamatsu, K.; Ikeda, H.; Miyashi, T.
    Z. Phys. Chem. NF (Munich) 1990, 167, 27–39.
    "The Free Enthalpy Dependence of Rate Constants of Return Electron Transfer within Photoproduced Geminate Radical Ion Pairs" (full paper) [Link]
  70. Ikeda, H.; Yamashita, Y.; Kabuto, C.; Miyashi, T.
    Tetrahedron Lett. 1988, 29, 5779–5782.
    "Unusual Cycloaddition of a Cage Ketone with Tetracyanoethylene by Irradiation of the Electron Donor—Acceptor Complex" [Link]
  71. Ikeda, H.; Yamashita, Y.; Kabuto, C.; Miyashi, T.
    Chem. Lett. 1988, 17, 1333–1336.
    "Interception of 1,4-Radical Cations Derived from a Cage Ketone with Molecular Oxygen" [Link]
  72. Yamashita, Y.; Ikeda, H.; Mukai, T.
    J. Am. Chem. Soc. 1987, 109, 6682–6687.
    "Photoinduced Electron-transfer Reactions of Cage Compounds. Novel Pericyclic Reactions Involving a Chain Process" (full paper) [Link]