Synthesis, crystal structures and photoluminescence of three new Mn(II) coordination polymers assembled from 2,4'-diphenic acid.

Guo, Feng; Zhu, Baoyong; Song, Yulan; Zhang, Xiuling

Three new metal coordination polymers, [Mn(Hdpa)2(4,4'-bipy)2]n (1), [Mn(dpa)(1,10-phen)(H2O)]n (2), and [Mn(dpa)(2,2'-bipy)]n (3) (H2dpa = 2,4'-biphenyl-dicarboxylic acid, 4,4'-bipy = 4,4'-bipyridine, 1,10-phen = 1,10-phenanthroline, and 2,2'-bipy = 2,2'-bipyridine), have been synthesized and characterized by elemental analysis, IR, and X-ray diffraction. Single-crystal X-ray analyses reveal that 2,4'-diphenic acid is a bridging ligand, exhibiting three coordination modes to link metal ions: μ1-η1: η1/μ0-η0: η0; μ2-η2: η0/μ1-η1: η0; and μ2-η1: η1/μ2-η1: η1. Intermolecular hydrogen bonds in 1 lead to a zigzag chain. In 2, the 2-D supramolecular arrays extended along b-axis through π-π interactions between 1,10-phen. The dinuclear paddle-wheel second building units (SBUs) constructed by four dpa2- ligands in 3 are linked by dpa2- into double-strand chains. The fluorescence of H2dpa and 1-3 are also determined.

COORDINATION compounds; COORDINATION polymers; PHOTOLUMINESCENCE; SOLUTION (Chemistry); LIGANDS (Chemistry); HYDROGEN bonding

Journal of Coordination Chemistry, 2010, Vol 63, Issue 8, p1304

0095-8972

Academic Journal

10.1080/00958971003782590