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Supramolecular compounds constructed from Keggin anions and metal–organic complex cations of 3-aminopyrazine-2-carboxylic acid

  • Wei Dong
  • Feng Yao
  • Ya-Guang Chen
  • Qun Tang
Original Article

Abstract

Three new supramolecular compounds based on Keggin-type polyoxometalate (POM) and transition metal complexes, [M(Hapca)2(H2O)2]2[SiW12O40]·nH2O, (M = NiII(1), ZnII(2), n = 12; CoII (3), n = 15; Hapca = 3-aminopyrazine-2-carboxylic acid), have been synthesized in aqueous solution and characterized by single-crystal X-ray diffraction, elemental analysis, TG analyses, IR and fluorescence spectroscopy. The X-ray structrual analysis reveals that three compounds are isostructural with a P21/c space group. [M(Hapca)2(H2O)2] 2 4+ are linked together via O···N hydrogen-bonding interaction to give birth to 2D layer with rectangle grids. Anions [SiW12O40]4− are located in the cavities and link the 2D layers into 3D supramolecular architecture via hydrogen bonds. The compounds represent the first examples of self-assembly of 2D metal–Hapca complex supramolecular “host” networks formed by hydrogen bonding interactions and “guest” polyoxoanion species. In addition, solid-state luminescence properties of compounds 2 and 3 have been studied at room temperature.

Keywords

Polyoxometalates 3-aminopyrazine-2-carboxylic acid Supramolecular compounds Fluorescence spectroscopy 

Notes

Acknowledgments

This work was supported by the Natural Science Foundation of Jilin Province (No. 201115002).

Supplementary material

10847_2013_310_MOESM1_ESM.doc (229 kb)
Supplementary material Crystallographic data (excluding structure factors) for the structures reported in this paper have been deposited with the Cambridge Crystallographic Data Centre, CCDC, 12 Union Road, Cambridge CB2 1EZ, UK. Copies of the data can be obtained free of charge on quoting the depository numbers CCDC-845668, 870787 and 710214. (Tel: +44 (0)1223-762-911; E-Mail: deposit@ccdc.cam.ac.uk, http://www.ccdc.cam.ac.uk). Supporting information of Table S1-S3 is included. (DOC 229 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Key Laboratory of Polyoxometalate Science of Ministry of Education, College of ChemistryNortheast Normal UniversityChangchunPeople’s Republic of China

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