Structures and luminescent properties of four compounds based on binuclear metal-terpyridine building blocks.

Four new coordination polymers, [Cd(3-TPTP)Cl]2(3-HTPTP = 4′-(3-tetrazolylphenyl)2,2′:6′2′′-terpyridine,1),{[Cd(3-TPTP)(pBDC)0.5]∙4H2O}n(pH2BDC = 1,4-benzenedicarboxylic acid,2), {[Mn(3-TPTP)(mBDC)0.5]∙5H2O}n(mH2BDC = 1,3-benzenedicarboxylic acid,3), and [Pb(3-TPTP)(H2O)2]∙OH (4), were obtained. Compounds1–3are composed of binuclear [M2(3-TPTP)2] ring as building unit. In1, the binuclear rings pack into a 3-D supramolecular framework via various hydrogen bonds. In2and3, the binuclear rings are connected bymBDC2−andpBDC2−, respectively, resulting in two types of 1-D chains. In4, the mononuclear [Pb(3-TPTP)] units are connected by Pb⋯N weak interactions, giving a chiral 1-D coordination chain, which is further connected by O–H⋯N interaction to form a chiral 3-D supramolecular framework. The phase purity of1–4and luminescence properties of1,2, and4were also investigated. [ABSTRACT FROM PUBLISHER]