Synthesis of novel luminescent cyclometallated platinum (IV) complexes with a quinoline Schiff bases ligand and their photophysical properties
作者:G. Sathya Priyadarshini、Ramesh Subramani、S. Elakkiya、Selvi Gopal
DOI:10.1080/24701556.2022.2068593
日期:——
eight cyclometallated platinum (IV) complexes 6a–6d and 7a–7d derived from quinoline Schiff base ligands are reported. Spectral studies revealed that nonparticipation of nitrogen atom and participation of carbon atom of the quinoline ring in the bond formation through [NN′C] mode of coordination for complex 6, whereas [N S O] mode of coordination with octahedral geometry for complex 7. The absorption and
摘要 报道了衍生自喹啉席夫碱配体的八种环金属化铂 (IV) 配合物6a–6d和7a–7d的合成、表征、电学和光物理性质。光谱研究表明,对于络合物6,通过 [NN'C] 配位模式参与氮原子和喹啉环碳原子的键形成,而对于配合物 7,[NSO] 八面体几何配位模式. 室温下在乙腈介质中研究的吸收和发射光谱表明,喹啉席夫碱配体中的配体电荷跃迁具有金属配体电荷转移 (MLCT) 特征。出现在 460-502 nm 范围内的宽带归因于环金属化铂 (IV) 化合物的较高发射强度。通过密度泛函理论 (DFT) 发现合成配合物的 HOMO、LUMO 和能隙分别为 - 2.60 eV、-4.75 eV 和 2.15 eV。