TRANSIENT EFFECT IN FLUORESCENCE QUENCHING BY ELECTRON TRANSFER. 4. LONG-RANGE ELECTRON TRANSFER IN A NONPOLAR SOLVENT
TRANSIENT EFFECT IN FLUORESCENCE QUENCHING BY ELECTRON TRANSFER. 4. LONG-RANGE ELECTRON TRANSFER IN A NONPOLAR SOLVENT
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电子转移荧光淬灭的瞬态效应。
DOI：
10.1021/jp991087h
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发表时间：
1999
影响因子：
2.9
通讯作者：
M. Tachiya
中科院分区：
文献类型：
--
作者：
L. Burel;M. Mostafavi;and Shigeo Murata;M. Tachiya
为了研究电子转移荧光在粘性非极性溶剂液体石蜡中猝灭的机理，对荧光猝灭的瞬态效应进行了测量和分析。分析方法与以往文献类似(J. Phys。化学，1995,99,5354；在极性溶剂中研究电子转移。与之前方法的不同之处在于，使用a exp[−b(r−r0)]形式的函数代替Marcus方程作为电子传递速率常数k(r)，除了分析高猝灭剂浓度（≥50 mM）下的荧光衰减外，还分析了稳态荧光强度与猝灭剂浓度的依赖关系。通过这些分析确定了参数A和b以及扩散系数D。利用这些参数值计算了淬火距离的分布。分布表明，淬火发生在距离大于接触点的地方。
The transient effect in fluorescence quenching observed in a viscous nonpolar solvent, liquid paraffin, was measured and analyzed in order to study the mechanism of electron transfer fluorescence quenching in such solvents. The method of analysis is similar to that adopted in previous papers (J. Phys. Chem. 1995, 99, 5354; 1996, 100, 4064) to study electron transfer in polar solvents. The difference from the previous method is that a function of the form A exp[−b(r − r0)] was used as the electron transfer rate constant k(r) instead of the Marcus equation and that the dependence of the steady-state fluorescence intensity on the quencher concentration was also analyzed in addition to the fluorescence decay at high quencher concentrations (≥50 mM). The parameters A and b and the diffusion coefficient D were determined from these analyses. The distribution of quenching distance was calculated using these parameter values. The distribution shows that the quenching occurs at distances longer than the contact di...