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Distinct chiral units from an axially prochiral ligand in a photoluminescent zinc(II)–organic complex

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The asymmetric unit of the title compound, poly[(dimethylamine‐κN)[μ3‐(E)‐2,6‐dimethyl‐4‐styrylpyridine‐3,5‐dicarboxylato‐κ3 O 3:O 3′:O 5]zinc(II)], [Zn(C17H13NO4)(C2H7N)] n , consists of one crystallographically independent distorted tetrahedral ZnII cation, one (E)‐2,6‐dimethyl‐4‐styrylpyridine‐3,5‐dicarboxylate (mspda2−) ligand and one coordinated dimethylamine molecule. Two S‐ and R‐type chiral units are generated from the axially prochiral mspda2− 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 λmax = 432 nm upon excitation at 365 nm.
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Document Type: Research Article

Publication date: April 15, 2012

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