Publication Date:
2015-08-08
Description:
Two new coordination polymers (CPs) formed from 5-iodobenzene-1,3-dicarboxylic acid (H 2 iip) in the presence of the flexible 1,4-bis(1 H -imidazol-1-yl)butane (bimb) auxiliary ligand, namely poly[[μ 2 -1,4-bis(1 H -imidazol-1-yl)butane-κ 2 N 3 : N 3′ ](μ 3 -5-iodobenzene-1,3-dicarboxylato-κ 4 O 1 , O 1′ : O 3 : O 3′ )cobalt(II)], [Co(C 8 H 3 IO 4 )(C 10 H 14 N 4 )] n or [Co(iip)(bimb)] n , (1), and poly[[[μ 2 -1,4-bis(1 H -imidazol-1-yl)butane-κ 2 N 3 : N 3′ ](μ 2 -5-iodobenzene-1,3-dicarboxylato-κ 2 O 1 : O 3 )zinc(II)] trihydrate], {[Zn(C 8 H 3 IO 4 )(C 10 H 14 N 4 )]·3H 2 O} n or {[Zn(iip)(bimb)]·3H 2 O} n , (2), were synthesized and characterized by FT–IR spectroscopy, thermogravimetric analysis (TGA), solid-state UV–Vis spectroscopy, single-crystal X-ray diffraction analysis and powder X-ray diffraction analysis (PXRD). The iip 2− ligand in (1) adopts the (κ 1 ,κ 1 -μ 2 )(κ 1 , κ 1 -μ 1 )-μ 3 coordination mode, linking adjacent secondary building units into a ladder-like chain. These chains are further connected by the flexible bimb ligand in a trans – trans – trans conformation. As a result, a twofold three-dimensional interpenetrating α-Po network is formed. Complex (2) exhibits a two-dimensional (4,4) topological network architecture in which the iip 2− ligand shows the (κ 1 )(κ 1 )-μ 2 coordination mode. The solid-state UV–Vis spectra of (1) and (2) were investigated, together with the fluorescence properties of (2) in the solid state.
Print ISSN:
0108-2701
Electronic ISSN:
1600-5759
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
