title: Photostability enhancement of the pentacene derivative having two nitronyl nitroxide radical substituents.
abstract: Pentacene derivatives possessing nitronyl nitroxide radical substituents (1a and 1b) were synthesized, and their photochemical properties were evaluated. 1a with two radical substituents showed a remarkable enhancement of photostability compared with pentacene, 6,13-bis(triisopropylsilylethynyl)pentacene and the monoradical, 1b. This is understood due to the presence of the multiple deactivation pathways in the photoexcited states.
authors.affiliation: Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan. teki@sci.osaka-cu.ac.jp.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Shimizu
authors.affiliation: Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan. teki@sci.osaka-cu.ac.jp.
authors.forename: Akitaka
authors.initials: A
authors.lastname: Ito
authors.affiliation: Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan. teki@sci.osaka-cu.ac.jp.
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Teki
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D009279:Naphthacenes / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry*; D055668:Photochemical Processes
chemical_list: D009279:Naphthacenes; D009589:Nitrogen Oxides; C523499:pentacene; C039900:nitroxyl