锌酞菁类染料荧光寿命的非瞬态实验估算

合成了一系列的锌酞菁染料。用循环伏安法测定了它们的氧化还原电位, 并测定了用典型的电子受体猝灭它们的荧光动力学数据。按电子转移模式确定了各染料-电子受体对的荧光猝灭速率常数κ_q对电子从染料向受体转移的自由能变化⊿G函数关系。根据测得的氧化还原电位和光谱数据计算出⊿G, 根据函数关系计算出κ_q, 代入到猝灭动力学数据κ_qτ。这样,就用非瞬态的实验估算出染料的荧光寿命r。与已知的实测文献值进行比较, r的大致范围是可信的。

EVALUATION OF FLUORESCENCE LIFETIME OF ZINC PHTHALOCYANINES BY NON-TRANSIENT EXPERIMENTS

A series of zinc phthalocyanines was synthesized. Their redox potentials, E_(ox) and E_R were measured by means of cyclic voltammetry. Their kinetic datum, κ_qτ of fluorescence quenching by typical electron acceptor was determined. The theoretical relation of the fluorescence quenching rate constant, κ_q vs. the electron transfer free enthalpy change, △G was calculated from redox potential and spectral datum, and κ_q was calculated from the theoretical relation between κ_q and △G. By substituting κ_q into κ_qτ, the lifetime of dye's fluorescence can be evaluated by non-transient experiments and simple calculations. In comparing with data in literature, the average fluorescence lifetime of the dye obtained is receivable.