Photoinduced Electron Transfer within Porphyrin-Anthra-quinone Dyads Connected by Hamilton Hydrogen Bonding
作者:Xin Zhao、Jinping Chen、Yi Zeng、Yingying Li、Yongbin Han、Yi Li
DOI:10.1002/cjoc.201090268
日期:2010.9
porphyrin chromophores results in an electron transfer between TPP‐CA/ZnTPP‐CA and AQ‐H within the supramolecular assemblies, leading to an efficient quenching of the TPP‐CA/ZnTPP‐CA fluorescence. The singlet electron transfer from porphyrin/ zinc‐porphyrin to anthraquinone proceeds mainly via a 'through space' mechanism with efficiencies of 43%, 58%, and rate constants of 7.6×107, 7.0×108 s−1, respectively
合成了卟啉或锌卟啉氰尿酸结合剂(TPP-CA或ZnTPP-CA)和与已知的“汉密尔顿受体”(AQ-H)连接的蒽醌。通过AQ‐H和TPP‐CA / ZnTPP‐CA构建的超分子二元组具有六个氢键,这些氢键提供的缔合常数K APP约为(2.8±0.3)×10 3 mol -1·L在甲苯中。卟啉/锌卟啉发色团的选择性激发导致超分子组件内TPP-CA / ZnTPP-CA和AQ-H之间的电子转移,从而有效地淬灭了TPP-CA / ZnTPP-CA荧光。从卟啉/锌卟啉单重电子转移至蒽醌主要进行经由与的43%,58%的效率a“到空间”机制,速率常数为7.6×10 7,7.0×10 8小号-1,分别。