Understanding ligand-centred photoluminescence through flexibility and bonding of anthraquinone inorganic–organic frameworks?

Journal of Materials Chemistry Pub Date: 2011-03-31 DOI: 10.1039/C0JM03907A

Abstract

Five novel inorganic–organic framework compounds containing the organic chromophore ligand anthraquinone-2,3-dicarboxylic acid (abbreviated H2AQDC) and calcium (CaAQDC), zinc (ZnAQDC), cadmium (CdAQDC), manganese (MnAQDC), and nickel (NiAQDC), respectively, have been synthesized. The photoluminescence of these materials is only visible at low temperatures and this behaviour has been evaluated in terms of ligand rigidity. It is proposed that the 2,3 position bonding sites result in luminescence-quenching ligand motion, as supported by X-ray diffraction and temperature-dependent luminescence studies.

Graphical abstract: Understanding ligand-centred photoluminescence through flexibility and bonding of anthraquinone inorganic–organic frameworks
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