Author
P. Indrasenan
Bio: P. Indrasenan is an academic researcher from University of Kerala. The author has contributed to research in topics: Denticity & Lanthanide. The author has an hindex of 5, co-authored 7 publications receiving 123 citations.
Topics: Denticity, Lanthanide, Schiff base, Ligand, Nitrate
Papers
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TL;DR: In this article, new complexes of lanthanide nitrates with 4N-(2′-hydroxy benzylidene)-aminoantipyrine (HBAAP) having the general formula [Ln(HBAPA) 2 (NO 3 ) 3 ] (where Ln = La, Pr, Nd, Sm, Gd, Tb, Dy, Ho and Y) have been prepared and characterized.
71 citations
TL;DR: In this article, ten new complexes of thorium(IV) nitrate with some schiff bases derived from 4-aminoantipyrine and certain carbonyl compounds such as benzaldehyde, 2-nitrobenzaldehyde, 3-naphthaldehyde, 4-methyl benzaldehyde and 4-N,N-dimethylaminobenzaldehyde have been synthesized and characterized by elemental analysis, molecular weight determination, and spectral and conductance studies.
22 citations
TL;DR: The physicochemical studies indicate that the five ligands and one of the perchlorates are coordinated to the metal ion in a monodentate fashion to give approximately octahedral geometries for the complexes as discussed by the authors.
12 citations
TL;DR: In this article, nine complexes of lanthanide nitrates with 4-benzoyl-3-methyl-1-phenylpyrazol-5-one (BMPP) having the general formula [Ln(bmpP)2(NO3)3] (where Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy and Y) were synthesized and their IR spectra obtained.
8 citations
TL;DR: In this paper, ten new thorium(IV) and dioxouranium(VI) complexes of some Schiff bases derived from pyridine-2-carboxaldehyde and certain amino compounds have been synthesized and characterized.
7 citations
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764 citations
TL;DR: In this article, structural properties and biological studies of transition metal complexes derived from 4-aminoantipyrine are discussed. But the most important results of extensive studies (syntheses, spectral, magnetic, redox, structural characteristics, antimicrobial and DNA cleavage) of the metal complexes with heterocyclic Schiff bases of 4-AMINOANTipyrines with some aldehydes and oximes are reviewed.
Abstract: The survey highlights structural properties and biological studies of transition metal complexes derived from 4-aminoantipyrine. The most important results of extensive studies (syntheses, spectral, magnetic, redox, structural characteristics, antimicrobial and DNA cleavage) of the metal complexes with heterocyclic Schiff bases of 4-aminoantipyrine with some aldehydes and oximes are reviewed.
180 citations
TL;DR: A novel series of Schiff bases is synthesized by condensation of 4-aminoantipyrine and various aromatic aldehydes followed by reaction with thiosemicarbazide, which are potential ligands toward transition metal ions.
Abstract: We have synthesized a novel series of Schiff bases by condensation of 4-aminoantipyrine and various aromatic aldehydes followed by reaction with thiosemicarbazide. These thiosemicarbazones are potential ligands toward transition metal ions. The reaction of copper(II) salts with 4[N-(benzalidene)amino]antipyrinethiosemicarbazone (BAAPTS), 4[N-(4′-methoxybenzalidene) amino] antipyrinethiosemicarbozone (MBAAPTS), 4[N-(4′-dimethylamino benzalidene) amino] antipyrinethiosemicarbazone (DABAAPTS), and 4[N-(cinnamalidene) amino] antipyrinethiosemicarbazone (CAAPTS) resulted in the formation of solid complexes with the general composition CuX2 · (H2O)(L)(X = Cl, Br,NO3,NCS, or CH3COO; L = BAAPTS, MBAAPTS, DABAAPTS, or CAAPTS). These complexes were characterized through elemental analysis, molecular weight, electrical conductance, infrared, electronic spectra, and magnetic susceptibilities at room temperature. Copper(II) complexes with BAAPTS and MBAAPTS were screened for antibacterial and antifungal properties and have exhibited potential activity. Thermal stabilities of two representative complexes were also investigated.
70 citations
TL;DR: In this article, neutral complexes of Cu(II, Ni(II), Co(I), Mn(II) and VO(IV) have been synthesized from the Schiff bases derived from salicylidene-4-aminoantipyrine and 2-aminophenol/2-aminothiophenol.
Abstract: Neutral complexes of Cu(II), Ni(II), Co(II), Mn(II), VO(IV) and Zn(II) have been synthesised from the Schiff bases derived from salicylidene-4-aminoantipyrine and 2-aminophenol/2-aminothiophenol. The structural features have been arrived at from their microanalytical, IR, UV-Vis., 1H NMR and ESR spectral data. All of the complexes exhibit square-planar geometry except the Mn(II) and VO(IV) complexes. The Mn(II) chelates show an octahedral environment and the VO(IV) chelates exist in a square-pyramidal geometry. The non-electrolytic and monomeric nature of the complexes are evidenced by their magnetic susceptibility and low conductance data. The electrochemical behaviour of the Cu(II), Mn(II) and VO(IV) complexes in DMSO at 300 °K were studied. [CuL1] complex shows an irreversible peak for the copper(II)/copper(I) couple at Epc1 = 0.16 V and Epa = 0.53V referenced to Ag/AgCl. The cyclic voltammogram of the [CuL2] complex in MeCN at 300°K shows a quasi-reversible peak for the couples copper(II)/copper(III) ...
62 citations
TL;DR: In this article, a quadridentate, N2O2-type Schiff base, synthesised from 1-phenyl-2,3-dimethyl-4-aminopyrazol-5-one (4-aminoantipyrine) and benzil, forms stable complexes with transition metal ions such as Cu(II), Ni(II) and VO(IV) in ethanol.
Abstract: A novel quadridentate, N2O2-type Schiff base, synthesised from 1-phenyl-2,3-dimethyl-4-aminopyrazol-5-one (4-aminoantipyrine) and benzil, forms stable complexes with transition metal ions such as Cu(II), Ni(II), Co(II), Mn(II), Zn(II) and VO(IV) in ethanol. Microanalytical data, magnetic susceptibility, IR, UV-Vis., 1H NMR, ESR and mass spectral techniques were used to confirm the structures. Electronic absorption and IR spectra of the complexes suggest an octahedral geometry around the central metal ion, except for the VO(IV)complex which has a square pyramidal geometry. The non-electrolytic behaviour of the chelates was assessed from the low conductance data, except for the vanadyl complex and the dipyridinyl adducts of the copper complexes which show a higher conductance, supporting an electrolytic nature of these complexes. The monomeric nature of the chelates was confirmed by their magnetic susceptibility values. Cyclic voltammograms of the [CuLCl2] and [CuL(OAc)2] complexes in DMSO solution...
57 citations