Crystal structure and luminescence spectrum of a one-dimensional nickel(II) coordination polymer incorporating 1,4-bis­[(2-methyl­imidazol-1-yl)meth­yl]benzene and adamantane-1,3-di­carboxyl­ate co-ligands

An Ni(II) coordination polymer, namely, poly[(μ(2)-adamantane-1,3-di­carboxyl­ato-κ(4) O (1),O (1′):O (3),O (3′))[μ(2)-1,4-bis­(2-methyl-imidazol-1-ylmeth­yl)benzene-κ(2) N (3):N (3′)]nickel(II)], [Ni(C(12)H(14)O(4))(C(16)H(18)N(4))]( n ) or [Ni(adc)(bmib)]( n ), (I) [adc = adamantane-1,3-di­carboxyl­ate, C(12)H(14)O(4) (2–) and bmib = 1,4-bis­(2-methyl-imidazol-1-ylmeth­yl)benzene, C(16)H(18)N(4)] was synthesized and characterized. It exhibits a one-dimensional extended structure built up from alternating [Ni(2)(bmib)(2)] 26-membered rings and [Ni(2)(adc)(2)] 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.