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Issue 12, 2018
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Some boron compounds of semicarbazones: antimicrobial activity and precursor for the sol–gel transformation to nanosized boron oxide

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Abstract

Few new boron derivatives of the type [(4-C6H4R)C(CH3)N[upper bond 1 start]N:C(NH2)O[upper bond 1 end][lower bond 1 start]B(OC6H4O[lower bond 1 end])] were synthesized by the reaction of O[upper bond 1 start]C6H4OB[upper bond 1 end]OPri and LH [LH = (OH)C(NH2)NN:C(CH3)(4-C6H4R)], [where R = H(L1H); CH3(L2H); OCH3(L3H); Cl(L4H); Br(L5H)] in a 1 : 1 molar ratio under toluene reflux. All these newly synthesized complexes were characterized using elemental analysis, and their probable structures were proposed on the basis of IR, 1H, 13C and 11B spectral data and EI mass spectrometry. Antimicrobial activities of the semicarbazone ligands and their boron derivatives were investigated against E. coli and P. aeruginosa bacteria and A. niger and P. peniculosum fungi. B(OPri)3 and the boron semicarbazone derivative [(4-C6H4Cl)C(CH3)N[upper bond 1 start]N:C(NH2)OB[upper bond 1 end][lower bond 1 start](OC6H4O[lower bond 1 end])] were used as precursors to synthesize nanosized cubic B2O3 (A and B) and orthorhombic B7O (C), respectively, by sol–gel transformation. The average particle sizes of B2O3 (A) and (B) and B7O (C) are ∼9.41 nm, ∼14.87 and ∼16.81 nm, respectively.

Graphical abstract: Some boron compounds of semicarbazones: antimicrobial activity and precursor for the sol–gel transformation to nanosized boron oxide

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Publication details

The article was received on 08 Feb 2018, accepted on 07 May 2018 and first published on 08 May 2018


Article type: Paper
DOI: 10.1039/C8NJ00683K
Citation: New J. Chem., 2018,42, 10376-10385
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    Some boron compounds of semicarbazones: antimicrobial activity and precursor for the sol–gel transformation to nanosized boron oxide

    J. Bhomia, J. Sharma, R. A. Sharma and Y. Singh, New J. Chem., 2018, 42, 10376
    DOI: 10.1039/C8NJ00683K

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