title: A novel one-dimensional tubular cadmium(II) coordination polymer based on 5-(carboxylatomethoxy)benzene-1,3-dicarboxylate containing 4-aminopyridinium ions.
abstract: A novel coordination polymer, poly[4-aminopyridinium [diaqua[μ3-5-(carboxylatomethoxy)benzene-1,3-dicarboxylato]cadmium(II)] dihydrate], {(C5H7N2)[Cd(C10H5O7)(H2O)2]·2H2O}n or {(HpAPy)[Cd(OABDC)(H2O)2]·2H2O}n [HpAPy is 4-aminopyridinium and H3OABDC is 5-(carboxymethoxy)benzene-1,3-dicarboxylic acid], was synthesized under hydrothermal conditions. Single-crystal analysis revealed that the anionic complex has a centrosymmetric one-dimensional tubular arrangement. The pyridine N atom of the 4-aminopyridine molecule is protonated and this cation balances the charge of the tubular anionic coordination polymer. Neighbouring tubes are crosslinked into a three-dimensional framework through multiple hydrogen bonds involving solvent water molecules and OABDC(3-) ligands.
authors.affiliation: College of Chemical and Environmental Engineering, Shandong University of Science and Technology, 579 Qianwangang Road, Economic & Technical Development Zone, Qingdao, Shandong Province 266590, People's Republic of China.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Kou
keywords: 4-aminopyridinium; 5-(carboxylatomethoxy)benzene-1,3-dicarboxylate; cadmium(II) coordination polymers; crystal structure; tubular anionic coordination polymer