title: Acceleration of guanine oxidation under visible light irradiation by photon upconversion based on triplet-triplet annihilation.
abstract: We report the fluorescent polymer complex which can show fluorescence emission at 380 nm with the excitation of 520 nm in aqueous media. This photon upconversion based on triplet-triplet annihilation can efficiently take place via inter-molecular energy transfers between the Ru complex as a sensitizer and anthracene molecules as an emitter captured into the water-soluble network polymers. We performed the oxidation reaction of 2'-deoxyguanosine by riboflavin in the presence of the polymer complex with the visible light irradiation. It was clearly indicated that oxidative decomposition can be accelerated by UV light generation via upconversion based on triplet-triplet annihilation.
authors.affiliation: Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tanaka
authors.forename: Narufumi
authors.initials: N
authors.lastname: Kitamura
authors.forename: Kenichi
authors.initials: K
authors.lastname: Inafuku
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Chujo
mesh_terms: D003849:Deoxyguanosine / Q000737:chemistry* / Q000528:radiation effects; D006147:Guanine / Q000737:chemistry; D008027:Light; D010084:Oxidation-Reduction; D017785:Photons; D012256:Riboflavin / Q000737:chemistry
chemical_list: D006147:Guanine; D003849:Deoxyguanosine; D012256:Riboflavin