期刊
JOURNAL OF COORDINATION CHEMISTRY
卷 74, 期 4-6, 页码 563-574出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2021.1873959
关键词
Copper-phosphole complexes; bis(quinolyl)phosphole; photophysical properties; fluorescent Cu complexes; PBEPBE/def2svp scan
资金
- Instituto Venezolano de Investigaciones Cientificas [1082, 1210]
A new phosphole derivative was synthesized with high yield, along with the synthesis of two new copper-phosphole complexes. The compounds were characterized by various techniques and their photophysical properties were analyzed.
A new phosphole derivative, 2,5-di(2-quinolyl)-1-phenylphosphole (1), was synthesized by using the Fagan-Nugent method. Phosphole 1 was obtained as an air-stable solid in high yield (73%). Additionally, two new copper-phosphole complexes, [CuX(Phosphole)(2)] (X = Cl (2a), I (2b), Phosphole=1), have been synthesized by reaction of CuX (X = Cl, I) and 1. All compounds were characterized by NMR, ESI-MS, UV-Vis, and fluorescence spectroscopy. The photophysical properties of all compounds were analyzed. UV-Vis spectra of 2a-b show pi-pi* transitions with shifts very similar to the free phosphole due to that their symmetrical structures inhibiting an efficient intraligand charge transfer, ILCT. Compounds 1, 2a-b exhibit fluorescence between 460 and 583 nm with quantum yields of phi(f) =0.04 - 0.11. The emission energy of 2b is higher than 2a, suggesting that lambda(max) is affected by the ligand-field strength of the halide in the complexes (I-\bar < Cl-\bar). The suggested structures of 2a-b were analyzed computationally at the PBEPBE/def2svp level of theory. The rotation barrier of the quinolyl group was analyzed by a scan analysis. Then, the 3 D structures of 2a-b were obtained in good agreement with the experimental results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据