Syntheses and Characterizations of 2,2-Dimethylglutarate Complexes with a Flexible 1,4-bis(imidazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene

Five new coordination polymers, {[Co2(μ-dmg)2(μ-p-tmbix)2]·H2On (1), [Co2(μ-dmg)2(μ-p-tmbix)2]n (2), [Zn2(μ-dmg)2(μ-p-tmbix)2]n (3), [Cd2(μ-dmg)2(μ-p-tmbix)2]n (4) and [Cd(μ-dmg)(μ-p-tmbix)]×H2O}n (5) were successfully synthesized by using H2dmg and p-tmbix ligands under hydrothermal conditions (p-tmbix = 1,4-bis(imidazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene, H2dmg = 2,2-dimethylglutaric acid). Their structures were characterized by single crystal X-ray diffraction, elemental analyses, IR spectroscopy, powder X-ray diffraction (PXRD). Single crystal X-ray diffraction analysis reveals that compounds 1-3 and 4 display 3D frameworks and 2D network, respectively, while compound 5 exhibits two-fold interpenetrated 3D structures with 66-dia topology. Furthermore, luminescence properties and thermal analysis (TG, DTA and DTA) of the complexes have been investigated