Crystal structure and luminescence spectrum of a one-dimensional nickel(II) coordination polymer incorporating 1,4-bis-[(2-methyl-imidazol-1-yl)meth-yl]benzene and adamantane-1,3-di-carboxyl-ate co-ligands.

An Ni coordination polymer, namely, poly[(μ-adamantane-1,3-di-carboxyl-ato-κ , : , )[μ-1,4-bis-(2-methyl-imidazol-1-ylmeth-yl)benzene-κ : ]nickel(II)], [Ni(CHO)(CHN)] or [Ni(adc)(bmib)], (I) [adc = adamantane-1,3-di-carboxyl-ate, CHO and bmib = 1,4-bis-(2-methyl-imidazol-1-ylmeth-yl)benzene, CHN] was synthesized and characterized. It exhibits a one-dimensional extended structure built up from alternating [Ni(bmib)] 26-membered rings and [Ni(adc)] 16-membered rings. The nickel atom lies on a crystallographic twofold axis and both ligands are completed by mirror symmetry. The solid-state luminescence spectra of (I) and the bmib ligand show strong emissions at 442 and 410 nm, respectively.