Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
Articles by U. N. Tripathi
Total Records ( 4 ) for U. N. Tripathi
  Jeeven S. Solanki , U. N. Tripathi , Arpan Bhardwaj and T. R. Thapak
  Dichlorobismuth(III) pyrazolinates and chlorobismuth(III) dipyrazolinates of the type BiCl2(C15H12N2OX) and BiCl(C15H12N2OX)2 have been synthesized in dry benzene by reaction of BiCl3 and the sodium salt of pyrazoline in 1 : 1 and 1 : 2 molar ratios at elevated temperature [C15H12N2OX = 3(2`-hydroxyphenyl)-5-(4-X-substituted phenyl) pyrazoline and X = H in compounds 1, 5, CH3 in 2, 6, OCH3 in 3, 7 and Cl in 4, 8, respectively]. These newly synthesized derivatives have been characterized by elemental analysis (C, H, N, Cl and Bi), molecular weight measurements and spectral (IR, 1H NMR, 13C NMR) studies. Selected compounds screened against different bacteria and fungi show potential antibacterial and antifungal activities.
  U. N. Tripathi , Jeevan S. Solanki , Mohd Safi Ahmad and Arpan Bhardwaj
  Dichloroantimony(III) pyrazolinates and chloroantimony(III) dipyrazolinates of the type SbCl 2(C 15H 12N 2OX) and SbCl(C 15H 12N 2OX)2 [where C15H 12N 2OX = 3(2′-hydroxyphenyl)-5-(4-X-phenyl)pyrazoline, X=H in 1 and 5;-CH 3 in 2 and 6;-OCH 3 in 3 and 7 and-Cl in 4 and 8] have been synthesized by reaction of SbCl 3 and sodium salt of pyrazolines in 1 : 1 and 1 : 2 molar ratio in anhydrous benzene at elevated temperature. These newly synthesized derivatives have been characterized by elemental analysis (C, H, N, Cl and Sb), molecular weight measurement and spectral studies [IR and 1H and 13C NMR]. The free pyrazoline and some dichloroantimony(III) pyrazolinates and chloroantimony(III) dipyrazolinates have been screened for antibacterial and antifungal activities, with some dichloroantimony(III) pyrazolinates and chloroantimony(III) dipyrazolinates exhibiting higher antibacterial and antifungal effects than free pyrazoline and some antibiotics.
  K. V. Sharma , Vandana Sharma and U. N. Tripathi
  A number of complexes of nickel(II) with 5(2′-hydroxyphenyl)-3-(4-X-phenyl)pyrazolines of the type (C15H12N2O ··· X)2Ni [where X = H, Cl, CH3 and OCH3] were synthesized by the reaction of anhydrous nickel(II) chloride with sodium salts of pyrazoline in 1 : 2 molar ratio. Their addition complexes with 2,2′-bipyridine, 1,10-phenanthroline and triphenylphosphine were prepared in 1 : 1 molar ratio. These complexes were characterized by elemental analyses, molecular weight, magnetic, conductivity, IR, electronic, 1H, 13C, 31P NMR and FAB mass spectral data. All complexes are amorphous. Square planar geometry around nickel confirms the presence of two bidentate pyrazoline ligands in nickel(II)5(2′-hydroxyphenyl)-3-(4-X-phenyl)pyrazolinates. In the addition complexes pyrazoline is monodentate. Bidentate and monodentate pyrazoline was confirmed by IR, 1H, 13C and 31P NMR spectral data. All the metal complexes exhibit very good antibacterial and antifungal activity. Coordination of metal ion has pronounced effect on the microbial activities of the ligand. The brine shrimp bioassay was also carried out to study their in vitro cytotoxic properties; all complexes and adducts display potent cytotoxic activity against Artemia salina.
  U. N. Tripathi , Afshan Siddiqui , Mohd. Safi Ahmad and Kajal Singh
  Complexes of iron(III) with ethylene glycol and 3(2’ -hydroxyphenyl)-5-(4’ -substituted phenyl) pyrazolines, [Fe(OCH2CH2O)(C15H12N2OX)]mnH2O and [Fe(C15H12N2OX)2(OCH2CH2OH)] (where OCH2CH2O and OCH2CH2OH = ethylene glycol moiety; C15H12N2OX = 3(2’ -hydroxyphenyl)-5-(4-X-phenyl)pyrazoline; X = H, CH3, OCH3, or Cl; m = 2-3 and n = 2-3) have been synthesized and characterized by elemental analysis (C, H, N, Cl, and Fe), molecular weight measurement, magnetic moment data, thermogravimetric analysis, molar conductance, spectral (UV-Vis, IR, and FAB mass), scanning electron microscopy, and X-ray diffraction studies. Bonding of ethylene glycol and pyrazolines in these complexes and the particle size of iron(III) complexes are discussed. Antibacterial and antifungal potential of free pyrazoline and some iron(III) complexes are also discussed.
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility