Zhang Ming-Xing, Chen Xin, Huang Kun-Lin, Zhu Yi, Yang Shan-Shan
College of Chemistry, Chongqing Normal University, Chongqing 400047, People's Republic of China.
Acta Crystallogr C. 2012 Apr;68(Pt 4):m90-3. doi: 10.1107/S0108270112006051. Epub 2012 Mar 3.
The asymmetric unit of the title compound, poly[(dimethylamine-κN)[μ(3)-(E)-2,6-dimethyl-4-styrylpyridine-3,5-dicarboxylato-κ(3)O(3):O(3'):O(5)]zinc(II)], Zn(C(17)H(13)NO(4))(C(2)H(7)N), consists of one crystallographically independent distorted tetrahedral Zn(II) cation, one (E)-2,6-dimethyl-4-styrylpyridine-3,5-dicarboxylate (mspda(2-)) ligand and one coordinated dimethylamine molecule. Two S- and R-type chiral units are generated from the axially prochiral mspda(2-) ligand through C-H...O hydrogen bonds. The R-type chiral units assemble a left-handed (M) Zn-mspda helical chain, while the right-handed (P) Zn-mspda helical chain is constructed from neighbouring S-type chiral units. The P- and M-type helical chains are interlinked by carboxylate O atoms to form a one-dimensional ladder. Interchain N-H...O hydrogen bonds extend these one-dimensional ladders into a two-dimensional supramolecular architecture. The title compound exhibits luminescence at λ(max) = 432 nm upon excitation at 365 nm.
标题化合物聚[（二甲胺-κN）[μ（3）-（E）-2,6-二甲基-4-苯乙烯基吡啶-3,5-二羧酸根-κ（3）O（3）：O（3′）：O（5）]锌（II）]，[Zn（C₁₇H₁₃NO₄）（C₂H₇N）]ₙ的不对称单元由一个晶体学独立的扭曲四面体Zn（II）阳离子、一个（E）-2,6-二甲基-4-苯乙烯基吡啶-3,5-二羧酸根（mspda²⁻）配体和一个配位的二甲胺分子组成。通过C-H...O氢键，轴向手性前体mspda²⁻配体产生两个S型和R型手性单元。R型手性单元组装成左手（M）型Zn-mspda螺旋链，而右手（P）型Zn-mspda螺旋链由相邻的S型手性单元构成。P型和M型螺旋链通过羧酸根O原子相互连接形成一维梯子状结构。链间N-H...O氢键将这些一维梯子状结构扩展为二维超分子结构。标题化合物在365 nm激发下在λ（max） = 432 nm处表现出发光。
