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荧光锌双水杨醛缩乙二胺配合物在系统结构修饰后发射效率和波长的变化

Variation of the Emission Efficiency and Wavelength from Fluorescent Zinc Salen Complexes upon Systematic Structural Modifications.

作者信息

Kurahashi Takuya

机构信息

Department of Nutrition Science, Faculty of Nursing and Nutrition, University of Nagasaki, Siebold, Manabino, Nagayo, Nagasaki 851-2195, Japan.

出版信息

ACS Omega. 2022 Aug 17;7(34):30642-30654. doi: 10.1021/acsomega.2c04714. eCollection 2022 Aug 30.

DOI:10.1021/acsomega.2c04714
PMID:36061697
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9435038/
Abstract

Understanding the photophysical properties of metal salen complexes is not straightforward because the emission efficiency is altered irregularly upon structural modifications. The present study prepared zinc salen complexes with systematic structural variations to pinpoint critical factors to determine the emission efficiency. One of the important experimental observations is the regiochemistry of a phenolate substituent affecting emission efficiency from a salicylidene fluorophore, which is nicely assigned as arising from the photoexcited electronic structure of metal salen complexes. Another significant finding is the thermal fluctuation of a salen ligand arising from the mismatched ligand-metal interaction, which has a significant impact on fluorescence lifetime. The present study sheds light on hidden factors that alter photophysical properties of a metal salen complex, which provide valuable insights into designing new photoactive salen ligands.

摘要

理解金属双水杨醛缩邻苯二胺配合物的光物理性质并非易事,因为结构修饰会不规则地改变其发射效率。本研究制备了具有系统结构变化的锌双水杨醛缩邻苯二胺配合物,以确定决定发射效率的关键因素。重要的实验观察结果之一是酚盐取代基的区域化学影响水杨醛荧光团的发射效率,这很好地归因于金属双水杨醛缩邻苯二胺配合物的光激发电子结构。另一个重要发现是由于配体 - 金属相互作用不匹配而导致的双水杨醛缩邻苯二胺配体的热波动,这对荧光寿命有重大影响。本研究揭示了改变金属双水杨醛缩邻苯二胺配合物光物理性质的隐藏因素,为设计新型光活性双水杨醛缩邻苯二胺配体提供了有价值的见解。

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