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Crystals 2017, 7(3), 92; doi:10.3390/cryst7030092

Two Organic Cation Salts Containing Tetra(isothiocyanate)cobaltate(II): Synthesis, Crystal Structures, Spectroscopic, Optical and Magnetic Properties

1
Department of Materials Science and Engineering, School of Aeronautics and Astronautics, Central South University, Changsha 410012, China
2
College of Materials and Energy, Institute of Biomaterial, South China Agricultural University, Guangzhou 510642, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Sławomir J. Grabowski
Received: 13 January 2017 / Revised: 17 March 2017 / Accepted: 17 March 2017 / Published: 22 March 2017
(This article belongs to the Section Interactions in Crystal Structures)
View Full-Text   |   Download PDF [3457 KB, uploaded 22 March 2017]   |  

Abstract

Single crystals of two hybrid organic-inorganic molecular solids, benzyl pyridinium tetra(isothiocyanate)cobalt ([BzPy]2[Co(NCS)4]) (1) and benzyl quinolinium tetra(isothiocyanate)cobalt ([BzQl]2[Co(NCS)4]) (2), were grown using a slow evaporation growth technique at room temperature and their IR, UV-Vis, X-ray crystal structures, luminescence, and magnetism were reported. The crystal structural analysis revealed that two molecular solids crystallize in the monoclinic space group P21/c of 1 and P21/n of 2. The cations form a dimer through weak C–H···π/π···π interactions in 1 and 2, and the adjacent cation (containing N(6) atom) in 2 forms a columnar structure through π···π weak interactions between the quinoline and benzene rings, while the anions in 1 form a layer structure via short S···Co interactions. The anions (A) and cations (C) are arranged alternatively into a column in the sequence of ···A–CC–A–CC–A··· for 1, while the two anions and cationic dimer in 2 form an alliance by the C–H···π, C–H···S and C–H···N hydrogen bonds. A weak S···π interaction was found in 1 and 2. The two molecular solids show a broad fluorescence emission around 400 nm in the solid state at room temperature, and weak antiferromagnetic coupling behavior when the temperature is lowered. View Full-Text
Keywords: tetra(isothiocyanate)cobalt(II) anion; spectra; crystal structure; fluorescence; magnetic properties tetra(isothiocyanate)cobalt(II) anion; spectra; crystal structure; fluorescence; magnetic properties
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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).

Supplementary materials

  • Supplementary File 1:

    PDF-Document (PDF, 716 KB)

  • Externally hosted supplementary file 1
    Doi: CCDC-1409786 and 1409787
    Link: http://www.ccdc.cam.ac.uk
    Description: CCDC-1409786 and 1409787 contain the supplementary crystallographic data for [BzPy]2[Co(NCS)4] and [BzQl]2[Co(NCS)4].

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MDPI and ACS Style

Zhang, Z.; Xu, J.; Yan, S.; Chen, Y.; Wang, Y.; Chen, Z.; Ni, C. Two Organic Cation Salts Containing Tetra(isothiocyanate)cobaltate(II): Synthesis, Crystal Structures, Spectroscopic, Optical and Magnetic Properties. Crystals 2017, 7, 92.

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