流体室温磷光法研究紫精衍生物与萘之间光诱导电子转移

在室温下以276 nm的光激发,紫精衍生物能够强烈猝灭萘的室温磷光.利用Sterner-Vohmer方程线性回归分析了实验结果,获得了不同猝灭剂紫精衍生物对萘室温磷光的猝灭常数KSV,在1.59×106~6.60×106L/mol之间.同时紫精衍生物的取代基碳链越长,其对萘室温磷光的猝灭常数越小.分析表明,导致萘室温磷光猝灭的原因是从萘到紫精衍生物的三重态电子转移过程.

Study of the Photoinduced Electron Transfer from Naphthalene to Viologen Derivative Based on Fluid Room Temperature Phosphorimetry

In this work,the results revealed that viologen derivative significantly quenches the phosphorescence of naphthalene in aqueous solution at room temperature. The static Stern-Volmer quenching constants of 1.59×10^6- 6.60×10^6 L/tool, which were found higher as the shorter of carbon chain length of viologen derivative, were determined from steady-state phosphorescence quenching experiments using Stern-Volmer analysis. Excitation with 276 nm light results in a triplet electron transfer between naphthalene and viologen derivative, so that there was a strong phosphorescence destroy in these systems.