Four 1D and 2D Cadmium(II) Complexes Based on Different Anions and Two Modified Bipyridyl Ligands: Syntheses,Structures, Thermogravimetric,and Fluorescent Properties |
| |
| Authors: | Dr. Linke Li Jingjing Zhao Changhong Wang Sisi Yang Dr. Hongwei Hou |
| |
| Affiliation: | Department of Chemistry, Zhengzhou University, Henan 450001, P. R. China |
| |
| Abstract: | A series of cadmium(II) coordination polymers constructed from 1, 3‐bis(pyridine‐3‐carbonyl)imidazolidin‐2‐thioxo (3‐bpit) and 1, 3‐bis(pyridine‐4‐carbonyl)imidazolidin‐2‐thioxo (4‐bpit), namely,{[Cd(SCN)2(3‐bpit)2] · 2(CH3OH)}n ( 1 ), {[Cd(NO3)2(3‐bpit)2] · 2(CH3OH)}n( 2 ), [CdI2(4‐bpit)]n ( 3 ), and [CdCl2(4‐bpit)4]n ( 4 ) were prepared and characterized by single‐crystal X‐ray diffraction. Complexes 1 and 2 display different types of infinite 1D helical chain structures, both of which contain 24‐membered metallocyclic rings. Complex 3 is composed of 1D zigzag chains, which further form a 3D supramolecular architecture by weak C–H ··· S and S ··· I interactions. Complex 4 also features a 3D supramolecular network assembled from 2D rhombus‐shaped layer through intermolecular hydrogen bonding. These structures indicate that the conformation of the ligand and the diverse anions take important roles in the formation of different frameworks. Thermogravimetric and fluorescent properties over complexes are also discussed. |
| |
| Keywords: | Cadmium Crystal structure Bipyridyl ligands Anions Thermogravimetric properties Fluorescent properties |
|
|
