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Two 8-Hydroxyquinolinate Based Supramolecular Coordination Compounds: Synthesis, Structures and Spectral Properties

School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
Department of Polymer Science and Engineering, University of Science & Technology of China, Jinzhai Rd. 96, Hefei 230026, China
Authors to whom correspondence should be addressed.
Academic Editor: Vance Williams
Materials 2017, 10(3), 313;
Received: 9 February 2017 / Revised: 3 March 2017 / Accepted: 16 March 2017 / Published: 18 March 2017
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Two new Cr(III) complexes based on 2-substituted 8-hydroxyquinoline ligands, namely [Cr(L1)3] (1), (HL1=(E)-2-[2-(4-nitro-phenyl)-vinyl]-8-hydroxy-quinoline) and [Cr(L2)3] (2), (HL2=(E)-2-[2-(4-chloro-phenyl)vinyl]-8-hydroxy-quinoline), were prepared by a facile hydrothermal method and characterized thoroughly by single crystal X-ray diffraction, powder X-ray diffraction, FTIR, TGA, ESI-MS, UV-Visible absorption spectra and fluorescence emission spectra. Single crystal X-ray diffraction analyses showed that the two compounds featured 3D supramolecular architectures constructed from noncovalent interactions, such as π···π stacking, C-H···π, C-H···O, C-Cl···π, C-H···Cl interactions. The thermogravimetric analysis and ESI-MS study of compounds 1 and 2 suggested that the Cr(III) complexes possessed good stability both in solid and solution. In addition, the ultraviolet and fluorescence response of the HL1 and HL2 shown marked changes upon their complexation with Cr(III) ion, which indicated that the two 8-hydroxyquinolinate based ligand are promising heavy metal chelating agent for Cr3+. View Full-Text
Keywords: 8-hydroxyquinoline; chromium (III) complex; supramolecular coordination compound 8-hydroxyquinoline; chromium (III) complex; supramolecular coordination compound

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhu, C.; Wang, Y.; Mao, Q.; Li, F.; Li, Y.; Chen, C. Two 8-Hydroxyquinolinate Based Supramolecular Coordination Compounds: Synthesis, Structures and Spectral Properties. Materials 2017, 10, 313.

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