Three naphthoate-based cadmium(II) complexes with discrete binuclear, cyclic tetranuclear, and polymeric double-chain motifs

Three naphthoate-based cadmium(II) complexes with discrete binuclear, cyclic tetranuclear, and... Three new naphthoate-based cadmium(II) complexes, [Cd2(Phen)2(NA)4] (I), [Cd4(H2O)2(2,2′-Bipy)2(NA)8] (II), and [Cd3(4,4′-Bipy)2(NA)6] n (III) (NA− = 1-naphthoate, Phen = 1,10-phenanthroline, 2,2′-Bipy = 2,2′-bipyridine, and 4,4′-Bipy = 4,4′-bipyridine), were hydrothermally synthesized by varying the N-heterocyclic coligands and characterized by X-ray single-crystal structure analysis (CIF files CCDC nos. 971968 (I), 971969 (II) and 971970 (III)). Structural analyses reveal that the former two samples are carboxylate aggregated oligomers with centrosymmetric binuclear and cyclic tetranuclear motifs. By contrast, complex III exhibits a polymeric one-dimensional double-chain with linear {Cd3(NA)6} subunits periodically extended by pairs of ditopic 4,4′-Bipy connectors. Obviously, the mixed ligands of the self-assemble system play different roles with the core-aggregation for carboxylate group and the extension/termination of the subunit for N-heterocyclic coligand. Furthermore, all the three entities with higher thermal stability display strong fluorescent emissions at room temperature resulting from the NA−-based intraligand and/or ligand-to-metal charge transfer, suggesting their hopeful use as fluorescent materials. Russian Journal of Coordination Chemistry Springer Journals

Three naphthoate-based cadmium(II) complexes with discrete binuclear, cyclic tetranuclear, and polymeric double-chain motifs

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Pleiades Publishing
Copyright © 2015 by Pleiades Publishing, Ltd.
Chemistry; Physical Chemistry; Inorganic Chemistry
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