磷光寿命法研究无保护流体室温磷光的重原子效应和发光动力学参数

Study on the Determination of Photophysical Parameters of the Non Protected Fluid Room Temperature Phosphorescence by Lifetime Method

以两种卤代萘为模型化合物 ,基于磷光寿命的定义τ =τ0 e-kc、τ0 =1/kp和其与各速率常数的关系 ,导出了一种类似于Stern Volmer方程的线性方程 :τ0 /τ=(kp+kic) /kp =1+kic/kp =1+KSV·c。通过测定不同重原子微扰剂浓度时的磷光寿命 ,探讨了从两种途径计算流体室温磷光发射相关动力学参数的可行性和方法 ,通过这些参数对比讨论了KI和TlNO3 两种重原子微扰剂对这两种卤代萘无保护流体室温磷光发射的重原子效应的差异。

The heavy atom pertuber (HAP) can promote the intersystem crossing and the rates of radiative and nonradiative processes of triplet state, thus shortens the phosphorescence lifetime. The determination of kinetic parameters for luminescence process is very importance to understand luminescence process and the mechanisms of the heavy atom effects. In this paper, 1-chloronaphthalene and 1-bromo-naphthalene were selected as the modal compounds, the possibility of determination of photophysical parameters for emission of nonprotected fluid mom temperature phosphorescence (NP-RTP) by RTP lifetime method was studied based on the definition on the phosphorescence lifetime and relation with the concentration of HAP. The results obtained by two ways prove that the RT? lifetime method can be used to determine photophysical parameters for RTP emission.