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本文研究了不同结构的受阻胺氮氧自由基对不同能态的光敏剂激发态的淬灭,并讨论了影响淬灭效果的各种因素.受阻胺氮氧自由基对光敏剂激发态的淬灭过程可分为如下情况:1.对于芳烃化合物激发态的淬灭过程,随淬灭剂分子结构的不同可以有能量转移和电子转移两种方式.此外,扩散因子在淬灭过程中起到重要作用.2.对于染料化合物激发态的淬灭过程是和染料光解生成自由基有关.受阻胺氮氧自由基的存在与染料自由基间发生自由基重合反应,导致染料褪色,发生“淬灭”.氢转移反应可促使染料自由基之生成,从而使“淬灭”的程度加剧.
In this paper, we studied the quenching of excited states of photosensitizers with different states by hindered amine nitroxides with different structures, and discussed various factors that affect the quenching effect.The hindered amine nitroxides quench the excited state of photosensitizers The process of quenching can be divided into the following conditions: 1. For the quenching process of the excited state of aromatic compounds, there are two ways of energy transfer and electron transfer with the different molecular structure of quencher. In addition, the diffusion factor plays a role in the quenching process An important role.2 for the quenching of the excited state of the dye compound and the dye photolysis free radicals related to the presence of hindered amine nitroxide and free radical radical recombination reaction between the dye, resulting in dye fading occurs Quench “Hydrogen transfer reaction can promote the formation of dye free radicals, so that ” quenching "degree of exacerbation.