Monoanionic Dipyrrin–Pyridine Ligands: Synthesis, Structure and Photophysical Properties
作者:Clémence Ducloiset、Pauline Jouin、Elisa Paredes、Régis Guillot、Marie Sircoglou、Maylis Orio、Winfried Leibl、Ally Aukauloo
DOI:10.1002/ejic.201500783
日期:2015.11
A novel monoanionic tetradentate N4 ligand (F5DPPy) based on a dipyrromethene skeleton as a molecular platform and decorated with pyridine rings at the 1- and 9-positions of the dipyrrin motif has been prepared and characterized. Interestingly, although this ligand is weakly fluorescent, it presents a chelation-enhanced fluorescence effect of around 150 times upon coordination to Zn II . Time-dependent
已经制备并表征了一种新型单阴离子四齿 N4 配体 (F5DPPy),其基于二吡咯亚甲基骨架作为分子平台,并在二吡喃基序的 1 位和 9 位用吡啶环装饰。有趣的是,虽然该配体的荧光较弱,但与 Zn II 配位后,它呈现出约 150 倍的螯合增强荧光效应。时间相关 (TD) DFT 计算很好地再现了配体和配合物的光谱特征,并且对激发态电子密度重新分布的分析表明,与 F 相比,F 5 DPPyZnCl 中 HOMO 和 LUMO 的轨道重叠更好5 DPPy 负责在前一个系统中观察到的更强烈的转变。因此,这种配体为比率传感器的设计开辟了有趣的前景。