A Study of Excited -State-Proton-Transfer Reaction

激发态质子转移反应的研究

基本信息

批准号：
09640610
负责人：
NAGAOKA Shin-ichi
金额：
$ 1.98万
依托单位：
Ehime University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640610/
关键词：
Excited State Proton Transfer Salicylaldehyde Vitamin E Excited-State Dependence Node Intramolecular Hydrogen Bond Antioxidant Reaction 置換基効果

项目摘要

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.

质子转移是一个非常简单的化学过程，可以轻松访问准确的测量和定量理论分析。我们已经构建了一个简单的理论模型，该模型是基于波函数的节点模式的模型。在这个项目中，我们研究了我们的节点平面模型在以下三个问题中的应用1。 O-羟基苯甲酰甲基氢的激发状态 - 分子 - 普罗顿转移（ESIPT）中的取代效应和电子状态依赖性。2。 2-（o-羟基苯二胺）苯甲唑的ESIPT的取代位置效果：尽管两种2-（2-羟基-3-芳基）苯甲唑和2-（1-羟基-2-芳基）苯甲酰苯二甲酸苯基苯基苯基苯基基团由芳基基团体组成，但苯并唑-2-基团组成，它们的物体是非常不同的，但它们是非常不同的。 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维生素E.有趣的是，微观电子行为可以在宏观的生命功能中表现出来。尽管我们的节点平面模型是定性的，但它使我们能够立即识别ESIPT的重要特征，并提供有关反应机制的有用信息。我们的节点平面模型适用于各种分子的各种激发态的光化学反应。许多化学家都引用了它，我们的解释的有用性得到了许多研究人员的认可。