Metallo-supramolecular assemblies of dinuclear Zn(II) and Mn(II) secondary building units (SBUs) and a bent silicon dicarboxylate ligand

Two metallo-supramolecular polymers {[Zn-2(L)(4)(DMF)(2)]center dot 0.8DMF}(n) (1) and {[Mn2L2(DMSO)(4)]center dot 2DMSO}(n) (2) (H2L = bis(p-carboxyphenyl)diphenylsilane) have been synthesized by the reaction of Zn(NO3)(2)center dot 6H(2)O and Mn (NO3)(2)center dot 4H(2)O respectively, with the above mentioned acid as ligand under solvothermal conditions. Both coordination polymers were structurally characterized by single crystal X-ray diffraction, elemental analysis, FTIR and UV-Vis spectroscopy. Single crystal X-ray diffraction analysis reveals dinuclear Zn(II) and Mn(II) nodes bridged by mono or double deprotonated ligand molecules coordinated in syn-syn bidentate mode. Thermal and moisture stability and photophysical properties of the resulting coordination polymers were studied and correlated with their structure.