Unusual temperature dependence of excited state proton transfer rates in alcohols
Unusual temperature dependence of excited state proton transfer rates in alcohols
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DOI：
10.1021/jp9932416
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发表时间：
2000-03-30
影响因子：
2.9
通讯作者：
Huppert, D
中科院分区：
文献类型：
--
作者：
Cohen, B;Huppert, D
研究了光酸在醇中的可逆质子解离和成对复合随温度的变化。为此目的，我们使用了能够将质子转移到醇的强光酸5，8-二氰基-2-萘酚（DCN 2）（pK（a）* 类似于水中的~ 4.5）。实验数据进行了分析的Debye-Smoluchowski方程数值求解的边界条件，占反应的可逆性。我们提出了一个定性的模型来描述不寻常的温度依赖性的质子转移速率常数在醇在液相中。
The reversible proton dissociation and geminate recombination of photoacids is studied as a function of temperature in alcohols. For this purpose we used a strong photoacid 5,8-dicyano-2-naphthol (DCN2) (pK(a)* similar to -4.5 in water) that is capable to transfer a proton to alcohols. The experimental data are analyzed by the Debye-Smoluchowski equation solved numerically with boundary conditions to account for the reversibility of the reaction. We propose a qualitative model to describe the unusual temperature dependence of the proton-transfer rate constant in alcohols in the liquid phase.