5,10,15-三(五氟苯基)Corrole及其相似卟啉化合物的光物理特性  

Photophysical Properties of 5,10,15-Tris(Pentafluorophenyl) Corrole and Its Porphyrin Analogue

作　　者：张燕伟[1] 史蕾[2] 沈涵[1] 张国良[1] 游丽莉[1] 文锦辉[1] 刘海洋[2] 王惠[1] 计亮年[1,3] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广东广州510275 [2]华南理工大学化学系,广东广州510641 [3]中山大学化学与化工学院,广东广州510275

出　　处：《光学学报》2008年第12期2375-2378,共4页Acta Optica Sinica

基　　金：国家自然科学基金(60478013;20571089;20771039);广东省自然科学基金重点项目(05101819)资助课题

摘　　要：采用稳态和时间分辨的瞬态光谱技术对比研究了一种Corrole化合物5,10,15-三(五氟苯基)Corrole(F15TPC)和一种卟啉化合物5,10,15,20-四(五氟苯基)卟啉(F20TPP)的光物理特性。结果表明:F15TPC的B带吸收峰较宽而F20TPP的强而窄,F15TPC的Q带有两个吸收峰而F20TPP有四个。F15TPC的荧光量子产率为0.15,荧光寿命为4.8ns,F20TPP的荧光量子产率为0.05,荧光寿命为11.1ns;与F20TPP相比F15TPC具有发光效率高、荧光寿命短的特点。F15TPC具有较大的发光速率常数和无辐射跃迁速率常数,这可能是由于F15TPC少了一个氟代苯基,致使其发色团本身的电子结构发生变化所致。另外空间结构的不对称性和非共面性也对其光物理性质有影响。The photophysical properties of 5,10,15-Tris （pentafluorophenyl） corrole （F15 TPC） and its porphyrin analogue 5,10,15,20-Tetra（pentafluorophenyl）porphyrin （F20 TPP） were investigated through the steady-state and the time-resolved transient spectroscopy. The results show a wide B band absorption peak for F15 TPC, and a sharp peak for Fz0TPP. The Q band of F15 TPC has two absorption peaks, while the F20 TPP has four. The luminescence quantum yield and fluorescence life time for F15 TPC and F20 TPP are 0.15, 4.8 ns and 0.05, 11.1 ns, respectively. The F15 TPC is characterized by high luminescence quantum yield and short fluorescence life time compared with F20 TPP. The calculation results show that the F15 TPC has large emission rate constant and nonemission rate constant. These may be ascribed to the changed electronic structure of the F15 TPC chromophore for the lack of a fluorophenyl and its unsymmetrical and non-planar spatial structure.

关 键 词：超快光谱学 光物理特性 CORROLE 卟啉 

分 类 号：O644.1[理学—物理化学]