Tanaka Kazuo, Kitamura Narufumi, Inafuku Kenichi, Chujo Yoshiki
Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan.
Nucleic Acids Symp Ser (Oxf). 2009(53):183-4. doi: 10.1093/nass/nrp092.
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.
我们报道了一种荧光聚合物复合物，其在水性介质中，在520nm激发下可在380nm处发射荧光。这种基于三重态-三重态湮灭的光子上转换能够通过作为敏化剂的钌配合物与捕获到水溶性网络聚合物中的作为发射体的蒽分子之间的分子间能量转移有效地发生。我们在聚合物复合物存在下，通过可见光照射进行了核黄素对2'-脱氧鸟苷的氧化反应。结果清楚地表明，基于三重态-三重态湮灭的上转换产生的紫外光可加速氧化分解。
