A Study of Excited -State-Proton-Transfer Reaction

质子转移是一个非常简单的化学过程，易于精确测量和定量理论分析。我们已经建立了一个简单的理论模型的激发态质子转移，模型的波函数的节图案的基础上。在这个项目中，我们研究了我们的平面模型在以下三个问题中的应用.邻羟基苯甲醛激发态分子内质子转移（ESIPT）中的取代基效应和电子态依赖性。2-（邻羟基芳基）苯并唑ESIPT的取代基位置效应：虽然2-（2-羟基-3-芳基）苯并唑和2-（1-羟基-2-芳基）苯并唑都由芳基、苯并唑基和油基组成，但它们的发光性质有很大的不同.氨基蒽醌ESIPT中的取代基和溶剂效应：质子转移形式的单重态-三重态能隙远小于标准形式的单重态-三重态能隙.对上述三个问题的实验结果都有力地支持了我们的双平面模型.此外，我们还合成了一个维生素E和醌的桥联分子，有趣的是，微观电子行为可以体现在宏观的生命函数中。虽然我们的电子-平面模型是定性的，它使我们能够立即认识到ESIPT的重要特征，并提供有关反应机理的有用信息。我们的平面模型适用于各种分子在各种激发态下的光化学反应。许多化学家都引用了它，我们的解释的有用性也得到了许多研究人员的认可。

Proton transfer is a very simple chemical process readily accessible to both accurate measurement and quantitative theoretical analysis. We have constructed a simple theoretical model of the excited-state-proton-transfer, a model based on the nodal pattern of the wave function. In this project we have studied the application of our nodal-plane model to the following three problems.1. The substituent effect and the electronic-state dependence in the excited-state-intramolecular-proton-transfer (ESIPT) of o-hydroxybenzladehydes.2. The substituent-position effect in ESIPT of 2-(o-hydroxyaryl)benzazoles : Although both 2-(2-hydroxy- 3-aryl)benzazole and 2-(1-hydroxy- 2-aryl)benzazole consist of an aryl moiety, a benzazol-2-yl group, and an Oil group, their emission properties are very different.3. The substituent and solvent effects in ESIPT of aminoanthraquinones : The singlet-triplet energy-gap of the proton-transferred form is much less than that in the normal form.The experimental results obtained on the above three problems strongly support our nodal-plane model.Furthermore, we synthesized a bridged molecule of vitamin E and quinones, and studied the radical scavenging reaction of vitamin E.It is interesting that the microscopic electron behavior could manifest itself in the macroscopic vital-function.Although our nodal-plane model is a qualitative one, it allows us to recognize the important features of ESIPT immediately and provides useful information about the reaction mechanisms. Our nodal-plane model is applicable to photochemical reactions in various excited states of various molecules. Many chemists have cited it, and the usefulness of our explanation is recognized by many researchers.