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Issue 44, 2010
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Fluorescent metal–organic polymers of zinc and cadmium from hydrothermal in situ acylation reaction

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Abstract

A series of metal–organic complexes based on d10 metals and the ligand H4bbh (H4bbh = benzene-1, 2, 4, 5-biformhydrazide), formed through hydrothermal in situ acylate reaction of H4bta (H4bta = benzene-1, 2, 4, 5-tetracarboxylic acid) with hydrazine hydrate (N2H4·H2O), have been prepared and structurally characterized by single-crystal X-ray diffraction. Compounds [Zn(μ2-H2bbh)(phen)(H2O)]2 (1) (phen = 1, 10-phenanthroline) and [Zn(μ2-H2bbh)(2, 2′-bpy)]2 (2) (2, 2′-bpy = 2, 2′-bipyridine) are both dinuclear complexes in which bridging ligands H2bbh2− display different μ2- coordination modes. [Zn(μ2-H2bbh)1/22-H2bbh)1/2(H2O)]n (3) exhibits a two-dimensional (2-D) layer structure containing simultaneously two kinds of different coordination modes of H2bbh2−: μ2-bidentate and μ4-tetradentate. [Cd(μ3-H2bbh)(phen)]n (4) consists of one-dimensional (1-D) double-metal chains. The crystal structures of these compounds are stabilized by hydrogen bonds and π⋯π interactions, forming three-dimensional supramolecular networks. All of the compounds were characterized by IR, UV-vis spectra and elemental analysis and they show good fluorescence properties in the solid state at room temperature. In order to understand the emission mechanism, we carried out TDDFT calculations on the excited electronic states of compound 2.

Graphical abstract: Fluorescent metal–organic polymers of zinc and cadmium from hydrothermal in situ acylation reaction

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Publication details

The article was received on 11 Feb 2010, accepted on 02 Aug 2010 and first published on 30 Sep 2010


Article type: Paper
DOI: 10.1039/C002946G
Citation: Dalton Trans., 2010,39, 10617-10625
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    Fluorescent metal–organic polymers of zinc and cadmium from hydrothermal in situ acylation reaction

    X. Yu, L. Ye, X. Zhang, X. Cui, J. Zhang, J. Xu, Q. Hou and T. Wang, Dalton Trans., 2010, 39, 10617
    DOI: 10.1039/C002946G

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