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Z. Naturforsch. 2013,
68b, 345 – 350
doi:10.5560/ZNB.2013-3028
Hydrothermal Synthesis and Crystal Structure of a Meso-Helical Chain Based on Lindqvist Polyoxometalates
1 College of Pharmaceutical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, P. R. China
2 Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, China
Reprint requests to Hui-Yuan Ma. Tel.: 86-0451-86392716. Fax: 86-0451-86392716. E-mail:
mahy017@163.com or Hai-Jun Pang. Tel.: 86-0451-88060623. Fax: 86-0451-88060085.
panghj116@163.com
Received January 28, 2013 / published online April 19, 2013
A new Lindqvist polyoxometalate-based hybrid compound with a helical chain structure, [Cu(bipy)2][W6O19] (1), (bipy = 2, 2′-bipyridine), has been hydrothermally synthesized and characterized by elemental analysis, infrared spectroscopy, thermogravimetry, and single-crystal X-ray diffraction. The compound crystallizes in the space group C2/c of the monoclinic system. In 1, the [W6O19]2− anions are connected alternately with [Cu(bipy)2]2+ subunits to form a meso-helical chain. To our knowledge, this structure represents the first example of a helical chain structure consisting of the hexatungstate anion [W6O19]2−. The electrochemical properties of the title compound have been studied.
Key words: Polyoxometalate, Lindqvist, Helical Structure, Hydrothermal Synthesis