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Russian Journal of Coordination Chemistry

, Volume 44, Issue 12, pp 779–785 | Cite as

Syntheses, Crystal Structures, and Antimicrobial Activities of Oxovanadium(V) Complexes with Tridentate Schiff base Ligand

  • X. Y. QiuEmail author
  • S. J. Liu
  • D. Z. Xu
Article
  • 9 Downloads

Abstract

Two structurally similar new oxovanadium complexes, [VO(L)(L1)] (I) and [VO(L)(L2)] (II), where L is the dianionic form of 3-((3-bromo-2-hydroxyphenyl)-{[1-(3-bromo-2-hydroxyphenyl)methylidene]amino}methyl)pentane-2,4-dione (H2L), L1 is the deprotonated form of 8-hydroxyquinoline, L2 is 2,2'-bipyridine, were prepared and characterized by spectroscopic and single crystal X-ray diffraction (СIF files CCDC nos. 1566824 (I), 1566825 (II)). Complex I crystallizes as the monoclinic space group P21/c with unit cell dimensions a = 11.265(1), b = 18.179(2), c = 13.461(2) Å, β = 103.376(3)°, V = 2681.8(5) Å3, Z = 4, R1 = 0.0659, wR2 = 0.1318, GOOF = 1.003. Complex II crystallizes as the orthorhombic space group Pbca with unit cell dimensions a = 19.958(1), b = 13.600(1), c = 22.8713(2) Å, V = 6192.3(8) Å3, Z = 8, R1 = 0.0550, wR2 = 0.1008, GOOF = 1.074. X-ray analysis indicates that the complexes are mononuclear oxovanadium(V) species with the V atoms in octahedral coordination. The complexes were evaluated for their antibacterial (Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Pseudomonas fluorescence) and antifungal (Candida albicans and Aspergillus niger) activities by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) method. Interestingly, complex II has strong activity against S. aureus.

Keywords:

Schiff base vanadium complex mononuclear complex crystal structure antimicrobial activity 

Notes

ACKNOWLEDGMENTS

This work was financially supported by K.C. Wong Magna Fund in Ningbo University, Ningbo natural science fund (project no. 201701HJ-B01019) and College students of science and technology innovation projects in Zhejiang province and Ningbo city (project nos. 2017R405008 and 2017YZD001).

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.College of Science and Technology, Ningbo UniversityNingboP.R. China

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