Cao Yilin, Takasaki Tomoe, Yamashita Satoshi, Mizutani Yasuhisa, Harada Akira, Yamaguchi Hiroyasu
Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka 560-0043, Osaka, Japan.
Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka 560-0043, Osaka, Japan.
Polymers (Basel). 2022 Mar 16;14(6):1191. doi: 10.3390/polym14061191.
Inspired by the natural photosynthetic system in which proteins control the electron transfer from electron donors to acceptors, in this research, artificial polymers were tried to achieve this control effect. Polyvinylpyrrolidone (PVP) was found to form complex with pigments 5,10,15,20-tetrakis-(4-sulfonatophenyl) porphyrin (TPPS) and its zinc complex (ZnTPPS) quantitatively through different interactions (hydrogen bonds and coordination bonds, respectively). These complex formations hinder the interaction between ground-state TPPS or ZnTPPS and an electron acceptor (methyl viologen, MV) and could control the photoinduced electron transfer from TPPS or ZnTPPS to MV, giving more electron transfer products methyl viologen cationic radical (MV). Other polymers such as PEG did not show similar results, indicating that PVP plays an important role in controlling the photoinduced electron transfer.
受蛋白质控制电子从供体向受体转移的天然光合系统的启发，在本研究中，尝试用人工聚合物实现这种控制效果。发现聚乙烯吡咯烷酮（PVP）通过不同的相互作用（分别为氢键和配位键）与色素5,10,15,20-四（4-磺基苯基）卟啉（TPPS）及其锌配合物（ZnTPPS）定量形成复合物。这些复合物的形成阻碍了基态TPPS或ZnTPPS与电子受体（甲基紫精，MV）之间的相互作用，并能控制光诱导的电子从TPPS或ZnTPPS向MV的转移，产生更多的电子转移产物甲基紫精阳离子自由基（MV）。其他聚合物如聚乙二醇（PEG）未显示出类似结果，这表明PVP在控制光诱导电子转移中起重要作用。
