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A new bis-pyrazole derivative, 2,6-bis-(5-phenyl-1H-pyrazol-3-yl) pyridine (H2BPPP), and two d10 metal complexes [Zn(H2BPPP)Cl2](DMF)2 (1), [Cd(H2BPPP)Cl2](DMF)2 (2) have been synthesized and characterized. There is a tautomeric equilibrium of the bis-pyrazole compound in solution and the H atom of pyrazolyl NH can transfer to the adjacent N atoms. X-ray structure analyses reveal the H atom is on the 2-position of pyrazolyl ring in donor solvents, while the H atom is on the 1-position of pyrazolyl ring in metal complexes. The luminescence of the ligand and complexes have been investigated. [ABSTRACT FROM AUTHOR]

Two metal-organic coordination polymers, [Cd(HIDC)(pytpy)] (1) and [Zn(HIDC)(pytpy)] · (H2O) (2), have been synthesized by reactions of 4'-(3-pyridyl)-2,2' : 6',2''-terpyridine (pytpy), 4,5-imidazoledicarboxylic acid (H3IDC) with CdCl2 · 2.5H2O and ZnCl2, respectively, in the presence of base. Compound 1 is a one-dimensional (1-D) helical chain with the chains extended into a three-dimensional supramolecular network through two different π ··· π interactions from pytpy ligands. Compound 2 is also a 1-D helical chain and adjacent chains are packed into a 2-D layer through π ··· π interactions between terminal pyridyl and pendant pyridyl rings from pytpy ligands. The photoluminescent properties of the two compounds are also investigated. [ABSTRACT FROM AUTHOR]