Synthesis, structure, photophysical properties and DFT investigation of novel Zn(II) complexes bearing π-extended 8-hydroxyquinoline-derived ligands
作者:Nguyen Hien、Nguyen Hoang Ninh、Le Minh Hieu、Nguyen Thi Bang Linh、Van Thong Pham、Tran Ngoc Dung、Luc Van Meervelt、Nguyen Thi Thanh Chi、Le Thi Hong Hai
DOI:10.1016/j.molstruc.2024.138464
日期:2024.4
ESI-MS, H NMR spectra and SC XRD. The analysis of NMR and XRD results revealed that all the complex geometries are tetrahedral in which the ligands coordinated with Zn(II) via the N and O atoms. The investigation of photophysical properties showed that the ligands themself are non-fluorescent, while the complexes displayed a strong emission at 597–628 nm, characterized by a fluorescence quantum yield
由 2,4-二芳基-8-羟基喹啉衍生物 (HQ1–HQ6) 合成了六种新的 Zn(II) 配合物 (Zn1–Zn6),并通过 ESI-MS、1H NMR 谱和 SC XRD 进行了结构表征。 NMR和XRD结果分析表明,所有复杂的几何形状都是四面体,其中配体通过N和O原子与Zn(II)配位。光物理性质的研究表明,配体本身不荧光,而配合物在597-628 nm处表现出强发射,其荧光量子产率为0.36-0.98,斯托克斯位移为174-202 nm,除了络合物Zn2。值得注意的是,在给电子取代基存在的情况下,溶剂中配合物的量子产率和固态下的发射强度往往会增加。进行量子化学计算以研究化合物的电子结构和光学特性,得到与实验观察结果一致的结果。