1. Seven novel coordination polymers constructed by rigid 4-(4-carboxyphenyl)-terpyridine ligands: synthesis, structural diversity, luminescence and magnetic properties.
- Author
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Peng Yang, Meng-Si Wang, Jin-Jin Shen, Ming-Xing Li, Zhao-Xi Wang, Min Shao, and Xiang He
- Subjects
POLYMERS ,PYRIDINE ,LUMINESCENCE ,MAGNETIC properties ,ORGANOMETALLIC compounds - Abstract
Seven coordination polymers, namely [Mn(4-cptpy)
2 ]n (1), [Co(4-cptpy)2 ]n (2), [Mn3 (4-cptpy)6 (H2 O)]n . 2nH2 O (3), [Co(4-cptpy)(HCOO)(H2 O)]n 'nDMF (4), [Zn2 (4-Hcptpy)2Cl4 ]n .2nC2 H5 OH.nH2 O (5), [Co4 - (3-cptpy)4 (HCOO)4 (H2 O)2 ]n (6), and [Mn(3-cptpy)2 ]n (7) (4-Hcptpy = 4-(4-carboxyphenyl)-4,2':6',4"-terpyridine; 3-Hcptpy = 4-(4-carboxyphenyl)-3,2':6',3"-terpyridine), have been synthesized under hydro- (solvo)thermal conditions and structurally characterized. A general solvothermal method is proposed for preparing carboxylate complexes in DMF solution without any basic additive. 1 and 2 possess isostructural 3D metal-organic frameworks containing nanosized cavities. 3 is a beautiful 2D coordination polymer assembled by flower-like Mn3(4-cptpy)6 (H2 O) subunits. 4 and 6 both display 2D polymeric networks constructed from 4/3-cptpy- ligands, in which the formate ligands originate from the hydrolysis of DMF. 5 is a 1D 21 helical chain polymer. 7 shows a 2D network with a (3.6) two-nodal kgd topology. 4/3-Hcptpy ligands display seven types of coordination modes. The zinc complex 5 emits strong violet luminescence. 1 and 2 are both thermally stable below 440 °C and exhibit antiferromagnetic interactions. [ABSTRACT FROM AUTHOR]- Published
- 2014
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