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对近期有机分子三重激发态调控的研究进展进行了总结评述。控制分子的三重激发态性质,可以制备多种具有新颖性质的分子,如用于可激活光动力治疗(PDT)的光敏剂、磷光分子探针与生物标识试剂,以及可控的三重态湮灭上转换等。但目前对三重态控制方面的研究相对较少,其中的规律也很不明确。近期有文献陆续报道了使用超分子方法和共价修饰法进行的三重态调控,利用的光物理过程有单重态能量转移、三重态能量转移、电子转移等等。现有研究结果表明,三重态的调控规律与单重态的调控规律有所不同,例如:发色团的单重激发态(荧光)往往可以被光诱导电子转移(PET)所猝灭,但是在多个例子中已发现,相同发色团的三重态并不能被PET所猝灭。本文总结的研究结果及所作的分析,将对该领域的分子结构设计及后续研究起到一定的促进作用。
Recent research progress on the regulation of triplet excitation of organic molecules is summarized. Controlling the triplet excited state properties of molecules enables the preparation of a variety of molecules with novel properties such as photosensitizers for activatable photodynamic therapy (PDT), phosphorescent molecular probes and bioassay reagents, and controlled triplet annihilation Conversion and so on. However, the current research on triplet control is relatively few, and the law is not clear. Recent literature has reported the use of supramolecular methods and covalent modification of the triplet regulation, the use of the optical physical processes have singlet energy transfer, triplet energy transfer, electron transfer and so on. The existing research results show that the rules of triplet regulation are different from those of singlet states. For example, the singlet excited state (fluorescence) of a chromophore can often be quenched by photo-induced electron transfer (PET) It has been found in many examples that the triplet state of the same chromophore can not be quenched by PET. This article summarizes the results of the research and analysis made, it will play a certain role in promoting the molecular structure design and follow-up research in this field.