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Assembly of four 8-quinolinate-based multinuclear complexes: the effect of substituents on core structures and photoluminescence properties

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Abstract

Four multinuclear Cd(II) complexes, namely [Cd2(L1)2I2·2DMSO] (1), [Cd3(L2)6] (2), [Cd4(L3)6Br2] (3) and [Cd4(L4)6Br2·2DMF] (4), were prepared by the solvothermal reactions of Cd(II) salts with four 8-hydroxyquinoline ligands containing different substituent groups, respectively. The self-assembly behaviors of the cadmium salts and ligands were subsequently investigated using ultraviolet and fluorescence spectra. In the solid state, single-crystal X-ray diffraction analysis showed that complexes 1–4 exhibit an unprecedented structural diversification, and show one binuclear, one trinuclear and two tetranuclear Cd(II) building units, which can be attributed to the different substituent groups in 8-quinolinate ligands. As a result, the four Cd(II) complexes exhibit disparate photoluminescence properties (emission bands, fluorescence lifetimes and quantum yields). This unique capability may provide a useful strategy to tune the structures and optical properties of multinuclear materials, which could be exploited as important components for optoelectronic devices.

Graphical abstract: Assembly of four 8-quinolinate-based multinuclear complexes: the effect of substituents on core structures and photoluminescence properties

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Publication details

The article was received on 10 Feb 2017, accepted on 24 Feb 2017 and first published on 27 Feb 2017


Article type: Research Article
DOI: 10.1039/C7QI00082K
Citation: Inorg. Chem. Front., 2017, Advance Article
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    Assembly of four 8-quinolinate-based multinuclear complexes: the effect of substituents on core structures and photoluminescence properties

    G. Yuan, Q. Zhang, Z. Wang, K. Song, X. Yuan, Y. Wang and L. Zhang, Inorg. Chem. Front., 2017, Advance Article , DOI: 10.1039/C7QI00082K

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