title: Seven novel coordination polymers constructed by rigid 4-(4-carboxyphenyl)-terpyridine ligands: synthesis, structural diversity, luminescence and magnetic properties.
abstract: Seven coordination polymers, namely [Mn(4-cptpy)2]n (1), [Co(4-cptpy)2]n (2), [Mn3(4-cptpy)6(H2O)]n·2nH2O (3), [Co(4-cptpy)(HCOO)(H2O)]n·nDMF (4), [Zn2(4-Hcptpy)2Cl4]n·2nC2H5OH·nH2O (5), [Co4(3-cptpy)4(HCOO)4(H2O)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(H2O) 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 2(1) 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.
authors.affiliation: Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China. mx_li@mail.shu.edu.cn hxiang@shu.edu.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Yang
authors.forename: Meng-Si
authors.initials: MS
authors.lastname: Wang
authors.forename: Jin-Jin
authors.initials: JJ
authors.lastname: Shen
authors.forename: Ming-Xing
authors.initials: MX
authors.lastname: Li
authors.forename: Zhao-Xi
authors.initials: ZX
authors.lastname: Wang
authors.forename: Min
authors.initials: M
authors.lastname: Shao
authors.forename: Xiang
authors.initials: X
authors.lastname: He