Syntheses, structures and properties of zinc(II) and cadmium(II) coordination polymers with mixed organic ligands.

Three new coordination polymers [Zn(tib)(BPDS)] ( 1 ), [Zn(tib) (BPDS) (H 2 O)]·6H 2 O ( 2 ) and [Zn 2 (tib) (TPDC-4CH 3 ) 2 ]·DMF·10H 2 O ( 3 ) (DMF = N, N-dimethylformamide), and a previously reported one [Cd(tib) 2 ]·2NO 3 ·4DMF ( 4 ) were synthesized by hydro/solvothermal reactions of corresponding metal salt with mixed organic ligands of 1, 3, 5-tris(1-imidazolyl)benzene (tib) and 4, 4'-biphenyldisulfonic acid (H 2 BPDS)/2′, 3′, 5′, 6′-tetramethylterphenyl-4, 4″-dicarboxylic acid (H 2 TPDC-4CH 3 ). The complexes were characterized by elemental, thermogravimetric analyses, IR, single crystal and powder X-ray diffractions. 1 and 2 are 2D networks with {4·8 2 } and {6 3 } topologies, which are further assembled into 3D architectures through hydrogen bonding interactions. In 3 , both tib and TPDC-4CH 3 2− act as bidentate bridging ligands and link Zn(II) centers to form a 3-fold interpenetrating 3D framework, while 4 is a (3, 6)-connected binodal 3D net with the Schläfli symbol of {4·6 2 } 2 {4 2 ·6 10 ·8 3 }. Gas and dye sorption and photoluminescence properties of the complexes were investigated. [ABSTRACT FROM AUTHOR]