Synthesis and fluorescence of multi-dimensional structures of two cobalt (II) complexes between 2,2′-bipyridine and different chain length of aliphatic dicarboxylic, succinic or glutaric acid
✍ Scribed by Tanwawan Duangthongyou; Chaveng Phakawatchai; Sutatip Siripaisarnpipat
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 938 KB
- Volume
- 987
- Category
- Article
- ISSN
- 0022-2860
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✦ Synopsis
Two coordination polymers [Co(l-succinato)(H 2 O) 2 (2,2 0 -bipy)] 1 and [Co 2 (l-H 2 O)(l-glutarato) 2 (2,2 0bipy) 2 ] 2 have been synthesized and characterized by single crystal X-ray diffraction, IR, thermal analysis (TGA) and fluorescence measurement. The crystallographic analysis reveals that these two compounds exhibit different in structures. Compound 1, cobalt (II) complex with succinic acid shows 1-D helical chain whereas compound 2, cobalt (II) complex with glutaric acid shows 1-D dinuclear polymeric chain. In compound 1, hydrogen bond are formed between water of crystalline, coordination water and uncoordinated carboxyl group of succinate ligand with adjacent chain extended 1-D chain into 2-D layer and also weak p-p interaction extend 2-D layer into 3-D network. Compound 2, p-p interaction between 2,2 0 -bipyridine in adjacent chain are formed resulting in 2-D layer. Each 2-D layer form Van der Waals interaction to each other building 3-D framework. In addition, these two compounds exhibit strong fluorescence at room temperature in the solid state.