Effects of Different Amount of Crystalline Solvate Molecules on Solid Structures and Photophysical Properties of a Platinum(II) Moiety with 4,4′‐Dibromo‐2,2′‐Bipyridine Ligand |
| |
| Authors: | Xu‐Qiao Gai Xiao‐Xin Zhang Jia‐Jia Kang Liang Xu Jian‐Jun Zhang Jun Ni |
| |
| Institution: | 1. College of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China;2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Materials, Chinese Academy of Sciences, Fuzhou 350002, P. R. China |
| |
| Abstract: | A platinum(II) complex Pt(DiBrbpy)Cl2 ( 1 ) based on 4,4′‐dibromo‐2,2′‐bipyridine ligand was synthesized and characterized. Interestingly, two solvated phases of 1 with different amounts of crystalline CH2Cl2 molecules, 1· 1/3(CH2Cl2) (yellow) and 1· 3/2(CH2Cl2) (red), were obtained. In the solid state, 1· 1/3(CH2Cl2) exhibits a 3D supramolecular structure based on Pt(DiBrbpy)Cl2 monomer and emits a weak yellow luminescence at 541 nm (579, sh). In contrast, 1· 3/2(CH2Cl2) displays a 2D layer structure based on Pt(DiBrbpy)Cl2 dimeric units and has a strong red luminescence centered at 624 nm. The results show that crystalline solvate molecule amount can not only influence the packing structures but also photophysical properties of the platinum moiety in solid state. Furthermore, the absorption and luminescence spectra of both phases were studied by TD‐DFT calculations. |
| |
| Keywords: | Solvate molecules Platinum Luminescence Pt– Pt contact Packing structure |
|
|
