Two new pyridine-2,3-dicarboxylate coordination polymers prepared from zerovalent metal precursor: Syntheses, luminescent and magnetic properties

Two new K+/Cu(II) and Zn(II) coordination polymers with pyridine-2,3-dicarboxylate (pydc), {K2[Cu(μ-pydc)2]·3H2O}n (1) and {[Zn(µ-pydc)(H2O)(4-mim)]·H2O}n (2) (4-mim=4-methylimidazole) have been synthesized from zerovalent metal and characterized by IR, EPR spectroscopy, thermal analysis and single crystal X-ray diffraction techniques. The water soluble {K2[Cu(μ-pydc)2]·3H2O}n shows three dimensional a rare 3,4,5-connected network with the point symbol of {42.6}2{42.84}{43.6.86}2. The temperature dependent magnetic property of complex 1 has been studied. Complex 2 exhibits unusual yellow luminescence in the solid state at room temperature.