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Synthesis, structure, luminescence properties, quantum chemistry and cytotoxic effects of two vanadium(IV) complexes with polypyrazolylborates, HB(pz)3VO(acac) and HB(3,5-Me2pz)3VO(acac)·CH3CN (pz = pyrazole)

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Abstract

The reaction of VO(acac)2 (acac = acetylacetonate) with NaHB(pz)3 (pz = pyrazole) or NaHB(3,5-Me2pz)3 in methanol gave vanadium(IV) complexes HB(pz)3VO(acac) (1) or HB(3,5-Me2pz)3VO(acac)·CH3CN (2), respectively. The complexes 1 and 2 were characterized by elemental analysis, IR, UV-vis, NMR and X-ray diffraction crystallography methods. Complex 1 crystallizes in space group P21/c, a = 7.641(2) Å, b = 17.008(4) Å, c = 13.362(2) Å; β = 92.092(17)°, V = 1735.5(7) Å3, Z = 4. Complex 2 crystallizes in space group P21/c, a = 17.410(13) Å, b = 8.076(16) Å, c = 19.300(13) Å; β = 101.75(5)°, V = 2657(6) Å3, Z = 4. X-ray structure analyses have shown that the complexes 1 and 2 are monomeric with a similar coordination environment of the vanadium atom. Luminescence properties and cytotoxic effects of the complexes are discussed. On CBRH-7919 cells, the complexes 1 and 2 caused a slight stimulation of growth at low doses (1–10 µM) and a significant cytotoxic effect at higher doses (100–1000 µM). The electronic structure and the bonding characters of the two complexes were analyzed with ab initio calculations.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Liaoning Normal University, China

    Y. H. Xing

  2. College of Life Science, Liaoning Normal University, China

    W. Zou & J. Song

  3. Institute of Chemistry, Chinese Academy of Sciences, Beijing, China

    Z. Sun & M. F. Ge

  4. Department of Materials Science, Toyohashi University of Technology, Toyohashi, Japan

    K. Aoki

Authors
  1. Y. H. Xing
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  2. Z. Sun
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  3. W. Zou
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  4. J. Song
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  5. K. Aoki
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  6. M. F. Ge
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Original Russian Text Copyright © 2006 by Y. H. Xing, Z. Sun, W. Zou, J. Song, K. Aoki, and M. F. Ge

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Translated from Zhurnal Strukturnoi Khimii, Vol. 47, No. 5, pp. 924–932, September–October, 2006.

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Xing, Y.H., Sun, Z., Zou, W. et al. Synthesis, structure, luminescence properties, quantum chemistry and cytotoxic effects of two vanadium(IV) complexes with polypyrazolylborates, HB(pz)3VO(acac) and HB(3,5-Me2pz)3VO(acac)·CH3CN (pz = pyrazole). J Struct Chem 47, 913–922 (2006). https://doi.org/10.1007/s10947-006-0408-3

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  • DOI: https://doi.org/10.1007/s10947-006-0408-3

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