Spectroscopic and biological approach of Ni(II) and Cu(II) complexes of 2-pyridinecarboxaldehyde thiosemicarbazoneSulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 69:816-21. 2008
..The ligand and its metal complexes were screened against phytopathogenic fungi and bacteria in vitro...
- EPR, IR and electronic spectral studies on Ni(II) and Cu(II) complexes with N-donor tetradentate [N4] macrocyclic ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 70:1001-5. 2008
..On the basis of IR, electronic and EPR spectral studies an octahedral geometry has been assigned for Ni(II) and tetragonal geometry for Cu(II) complexes...
Synthesis, spectroscopic characterization, molecular modeling and antimicrobial activities of Mn(II), Co(II), Ni(II), Cu(II) complexes containing the tetradentate aza Schiff base ligandSulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110 002, India Electronic address
Spectrochim Acta A Mol Biomol Spectrosc 103:338-48. 2013
..The antimicrobial activities and LD(50) values of the ligand and its complexes, as growth inhibiting agents, have been screened in vitro against two different species of bacteria and plant pathogenic fungi...
- Spectral, thermal and morphological studies of chromium nanoparticles
Sulekh Chandra
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, J L N Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 102:250-5. 2013
..TEM showed nearly uniform distribution of particles in methanol which was confirmed by QELS. Cr(0) nanoparticles can be synthesized easily by reducing agent and are quite stable too...
- Modulation of synthetic parameters of cobalt nanoparticles: TEM, EDS, spectral and thermal studies
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L N Marg, New Delhi 110 002, India Electronic address
Spectrochim Acta A Mol Biomol Spectrosc 98:23-6. 2012
..Crystalline size was 20nm determined from the sharp peak at 2θ=25°C from the powder XRD. TEM images of cobalt nanoparticles without reducing agent having the diameter 20nm with spherical shape and black color...
- Modulation of synthetic parameters of novel zinc nanoparticles and reducing agent: powder X-ray diffraction, transmission electron microscopy and spectral studies
Sulekh Chandra
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, J L N Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 97:935-41. 2012
..The results show that nanoparticles of zinc are of high purity and 20 nm in size...
- New hexadentate macrocyclic ligand and their copper(II) and nickel(II) complexes: Spectral, magnetic, electrochemical, thermal, molecular modeling and antimicrobial studies
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 94:312-7. 2012
..The antimicrobial activities and LD(50) values of the ligand and its complexes, as growth inhibiting agents, have been screened in vitro against two different species of bacteria and plant pathogenic fungi...
- Synthesis of Al nanoparticles: transmission electron microscopy, thermal and spectral studies
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, JLN Marg, New Delhi, India
Spectrochim Acta A Mol Biomol Spectrosc 92:392-7. 2012
..TEM showed nearly uniform distribution of the particles in methanol and it was confirmed by QELS. Al(0) nanoparticles can be synthesized easily by reducing agent and are quite stable too...
- Spectroscopic characterization of chromium(III), manganese(II) and nickel(II) complexes with a nitrogen donor tetradentate, 12-membered azamacrocyclic ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 69:1-7. 2008
..On the basis of IR, electronic and EPR spectral studies, an octahedral geometry has been assigned for these complexes except sulphato complexes which are of five coordinated geometry...
- Spectroscopic evaluation of Co(II), Ni(II) and Cu(II) complexes derived from thiosemicarbazone and semicarbazone
Sulekh Chandra
Department of Chemistry, Zakir Husain College, JLN Marg, New Delhi, India
Spectrochim Acta A Mol Biomol Spectrosc 68:1410-5. 2007
..On the basis of different spectral studies six coordinated geometry may be assigned for all the complexes except Co(L)(2)(SO(4)) and Cu(L)(2)(SO(4)) [where L=L(1) and L(2)] which are of five coordinated square pyramidal geometry...
- Spectral, IR and magnetic studies of Mn(II), Co(II), Ni(II) and Cu(II) complexes with pyrrole-2-carboxyaldehyde thiosemicarbazone (L)
Sulekh Chandra
Department of Chemistry, Zakir Husain College, JLN Marg, New Delhi, India
Spectrochim Acta A Mol Biomol Spectrosc 68:469-73. 2007
..A tetragonal geometry may be suggested for Cu(II) complexes...
- Spectral studies of cobalt(II) complexes of 12-membered macrocyclic ligands having thiosemicarbazone moieties
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JL Nehru Marg, New Delhi, India
Spectrochim Acta A Mol Biomol Spectrosc 68:883-90. 2007
..All the complexes are of high spin type showing magnetic moment corresponding to three unpaired electrons. All the complexes were also screened against bacteria and pathogenic fungi in vitro...
- Electronic, epr and magnetic studies of Co(II), Ni(II) and Cu(II) complexes with thiosemicarbazone (L1) and semicarbazone (L2) derived from pyrole-2-carboxyaldehyde
Sulekh Chandra
Department of Chemistry, Zakir Husain College, J L N Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 67:697-701. 2007
..A tetragonal geometry may be suggested for Cu(II) complexes...
- Spectral studies on Co(II), Ni(II) and Cu(II) complexes with thiosemicarbazone (L1) and semicarbazone (L2) derived from 2-acetyl furan
Sulekh Chandra
Department of Chemistry, Zakir Husain College, J L N Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 66:1347-51. 2007
..On the basis of spectral studies an octahedral geometry may be assigned for Co(II) and Ni(II) complexes except nitrato complexes of Ni(II) which is of tetrahedral geometry, whereas tetragonal geometry for Cu(II) complexes...
- Spectroscopic studies, cyclic voltammetry and synthesis of nickel(II) complexes with N(4), N(2)O(2) and N(4)S(2) donor macrocyclic ligands
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, Jawahar Lal Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:518-25. 2005
..Various ligand field parameters have been calculated and discussed...
- Spectroscopic studies of transition metal complexes with a N-donor tetradentate(N4) 12-membered macrocylic ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L N Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 71:458-64. 2008
..All complexes were of the high-spin type and found to have six-coordinate octahedral geometry except the Pd(II) and Pt(II) complexes which were four coordinate, square planar and diamagnetic...
- Structural and spectral studies of palladium(II) and platinum(II) complexes derived from N,N,N,N-tetradentate macrocyclic ligands
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 71:720-4. 2008
..All the complexes were found to be diamagnetic. The structures consist of monomeric units in which the Pd(II) and Pt(II) atoms exhibit square planar geometry...
- EPR, mass, electronic, IR spectroscopic and thermal studies of bimetallic copper(II) complexes with tetradentate ligand, 1,4-diformyl piperazine bis(carbohydrazone)
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 71:1712-9. 2009
..The values of covalency measurements, i.e., in-plane sigma-bonding alpha(2), in-plane pi-bonding beta(2) and orbital reduction factor k indicate the covalent nature of complexes...
- Coordination modes of a schiff base pentadentate derivative of 4-aminoantipyrine with cobalt(II), nickel(II) and copper(II) metal ions: synthesis, spectroscopic and antimicrobial studies
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, New Delhi, India
Molecules 14:174-90. 2009
..e. Alternaria brassicae, Aspergillus niger and Fusarium oxysporum and two bacteria, i.e. Xanthomonas compestris and Pseudomonas aeruginosa...
- Applications of several spectral techniques to characterize coordination compounds derived from 2,6-diacetylpyridine derivative
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JL Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 74:271-6. 2009
..The studies reveal that the complexes possess monomeric compositions with six coordinated octahedral geometry (Cr(III) and Mn(II) complexes) and six coordinated tetragonal geometry (Co(II) complexes)...
- Lanthanide complexes derived from hexadentate macrocyclic ligand: synthesis, spectroscopic and thermal investigation
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JL Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 75:835-40. 2010
..These parameters suggest the metal-ligand covalent bonding. In the present study, the complexes were found to have coordination number nine...
- Synthesis, molecular modeling and spectroscopic characterization of nickel(II), copper(II), complexes of new 16-membered mixed-donor macrocyclic schiff base ligand incorporating a pendant alcohol function
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 79:1326-30. 2011
..All the complexes are non-electrolyte in nature. On the basis of spectral studies, an octahedral geometry has been assigned for Ni(II) complexes and a tetragonal geometry for Cu(II) complexes...
- Nickel(II) and copper(II) complexes with Schiff base ligand 2,6-diacetylpyridine bis(carbohydrazone): synthesis and IR, mass, (1)H NMR, electronic and EPR spectral studies
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, India
Spectrochim Acta A Mol Biomol Spectrosc 72:851-7. 2009
..0023. The value of covalency factor beta and orbital reduction factor k accounts for the covalent nature of the complexes...
- Modern spectroscopic techniques in the characterization of Schiff base macrocyclic ligand and its complexes with transition metals
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:307-12. 2005
..Macrocyclic ligand and its complexes have also been screened against pathogenic bacteria and fungi in vitro as growth inhibiting agent...
- Spectroscopic, cyclic voltammetric and biological studies of transition metal complexes with mixed nitrogen-sulphur (NS) donor macrocyclic ligand derived from thiosemicarbazide
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:453-60. 2005
..Most of the complexes have higher activity than that of the metal free ligand...
- Spectral and magnetic studies on manganese(II), cobalt(II) and nickel(II) complexes with Schiff bases
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 61:219-24. 2005
..Various physico-chemical techniques suggest an octahedral geometry for all the complexes...
- Mass, IR, electronic and EPR spectral studies on transition metal complexes with a new tetradentate 12-membered new macrocyclic ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College, JL Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:3079-85. 2004
..The ligand (L) and its soluble transition metal complexes have also been screened against different bacteria and plant pathogenic fungi in vitro...
- Spectroscopic characterization of copper(II) complexes of indoxyl N(4)-methyl thiosemicarbazone
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:2825-9. 2004
..Cyclic voltammetry measurements show quasi-reversible Cu2+/Cu1+ couple. Various physico-chemical techniques suggest a tetragonal structure for these copper(II) complexes...
- Spectroscopic evaluation of manganese(II) complexes derived from semicarbazones and thiosemicarbazones
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 61:2549-54. 2005
..All the complexes show magnetic moments corresponding to five unpaired electrons. The possible geometries of the complexes were assigned on the basis of EPR, electronic and infrared spectral studies...
- Novel copper(II) homobinuclear macrocyclic complexes: cyclic voltammetry, biological properties and spectral studies
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 63:587-93. 2006
..The macrocyclic complexes show more anti-bacterial than controlled one. The anti-bacterial activities of the compounds were tested against Streptococcus fecalis and Escherichia coli with different concentrations...
- Mass, EPR, IR and electronic spectroscopic studies on newly synthesized macrocyclic ligand and its transition metal complexes
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:1125-30. 2005
..The ligand and its complexes were also evaluated against the growth of bacteria and pathogenic fungi in vitro...
- Spectroscopic studies on Co(II), Ni(II) and Cu(II) complexes with a new macrocyclic ligand: 2,9-dipropyl-3,10-dimethyl-1,4,8,11-tetraaza-5,7:12,14-dibenzocyclotetradeca-1,3,8,10-tetraene
Sulekh Chandra
Department of Chemistry, Zakir Husain College, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 61:1181-8. 2005
..The ligand and its metal complexes were also screened against the growth of some bacteria and plant pathogenic fungi in vitro...
- Spectroscopic characterization of tetradentate macrocyclic ligand: its transition metal complexes
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:2767-74. 2004
..The ligand and its complexes were also evaluated against the growth of bacteria and pathogenic fungi in vitro...
- Electronic, EPR, magnetic and mass spectral studies of mono and homo-binuclear Co(II) and Cu(II) complexes with a novel macrocyclic ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:1102-6. 2005
..The mononuclear complexes of the type [ML]X2 have been found to have distorted octahedral geometry and the binuclear complexes [M2LX2]X2 were found to possess square planar configuration around the central metal ion...
- Spectroscopic and biological studies on newly synthesized nickel(II) complexes of semicarbazones and thiosemicarbazones
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:1089-94. 2005
..The possible geometries of the complexes were assigned on the basis of electronic and infrared spectral studies. Newly synthesized ligand and its nickel(II) complexes have been screened against different bacterial and fungal growth...
- Spectral studies, cyclic voltammetry and synthesis of cobalt(II) and ruthenium(III) complexes with symmetric and asymmetric ring containing membered N2S2, N4, and N5 donor macrocyclic ligands
Sulekh Chandra
Department of Chemistry, Zakir Husain College Delhi University, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:1050-7. 2005
..These novelties are usually attributed to pi-bonding effects for ligands such as carbon monoxide, solvent effects, or a change in mechanism...
- EPR, magnetic and spectral studies of copper(II) and nickel(II) complexes of schiff base macrocyclic ligand derived from thiosemicarbazide and glyoxal
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, J L Nehru Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:147-53. 2004
..The complexes from H(2)L(4) show different stoichiometry ratio and with a variable grade of deprotonation in the ligand, depending upon the salt used and working conditions...
- EPR and electronic spectral studies on Co(II), Ni(II) and Cu(II) complexes with a new tetradentate [N4] macrocyclic ligand and their biological activity
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:1563-71. 2004
..This ligand and its complexes were also screened against bacteria and pathogenic fungi in vitro...
- EPR, IR and electronic spectral studies on Mn(II), Co(II), Ni(II) and Cu(II) complexes with a new 22-membered azamacrocyclic [N4] ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:1751-61. 2004
..The biological actions of the ligand and complexes have been screened in vitro against many bacteria and pathogenic fungi to study their comparative capacity to inhibit the growth...
- Spectroscopic, redox and biological activities of transition metal complexes with ons donor macrocyclic ligand derived from semicarbazide and thiodiglycolic acid
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:2153-62. 2004
..niger, A. alternata and P. variotii. Most of the complexes have higher activities than that of free ligand...
- Spectroscopic studies on Mn(II), Co(II), Ni(II), and Cu(II) complexes with N-donor tetradentate (N4) macrocyclic ligand derived from ethylcinnamate moiety
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 60:2411-7. 2004
..The ligand and its complexes were also evaluated against the growth of bacteria and pathogenic fungi in vitro...
- EPR, mass, IR, electronic, and magnetic studies on copper(II) complexes of semicarbazones and thiosemicarbazones
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 61:269-75. 2005
..All the complexes were found to have magnetic moments corresponding to one unpaired electrons. The possible geometries of the complexes were assigned on the basis of EPR, electronic, and infrared spectral studies...
- Complexation of nitrogen and sulphur donor Schiff's base ligand to Cr(III) and Ni(II) metal ions: synthesis, spectroscopic and antipathogenic studies
Amit Kumar Sharma
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 78:337-42. 2011
..A. niger causes the diseases Apergillosis and Otomycosis in humans...
- Electronic, cyclic voltammetry, IR and EPR spectral studies of copper(II) complexes with 12-membered N4, N2O2 and N2S2 donor macrocyclic ligands
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 61:437-46. 2005
..Whereas the sulfato and nitrato complexes are found to have five-coordinate square-pyramidal and four-coordinate square-planar geometry, respectively...
- Spectroscopic and mycological studies of Co(II), Ni(II) and Cu(II) complexes with 4-aminoantipyrine derivative
Amit Kumar Sharma
Department of Chemistry, Ramjas College, University of Delhi, University Enclave, Delhi 110007, India
Spectrochim Acta A Mol Biomol Spectrosc 81:424-30. 2011
..The mycological studies of the compounds were examined against the several opportunistic pathogens, i.e., Alternaria brassicae, Aspergillus niger and Fusarium oxysporum. The Cu(II) complexes were found to have most fungicidal behavior...
- Spectroscopic approach in characterization of chromium(III), manganese(II), iron(III) and copper(II) complexes with a nitrogen donor tetradentate, 14-membered azamacrocyclic ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 61:2139-44. 2005
..On the basis of IR, electronic and EPR spectral studies an octahedral geometry has been assigned for Cr(III), Mn(II) and Fe(III) and a tetragonal geometry for Cu(II) complexes...
- The Spectroscopy: a modern technology in the characterization of novel macrocyclic ligand and its homo-bi-nuclear cobalt (II) complexes
Lokesh Kumar Gupta
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi, India
Spectrochim Acta A Mol Biomol Spectrosc 68:839-44. 2007
..The antimicrobial activities of the ligand and its complexes, as growth inhibiting agents, have been screened in vitro against several species of bacteria and plant pathogenic fungi...
- Synthesis, structural, spectral, thermal and antimicrobial studies of palladium(II), platinum(II), ruthenium(III) and iridium(III) complexes derived from N,N,N,N-tetradentate macrocyclic ligand
Soni Rani
Department of Chemistry, Zakir Husain College University of Delhi, New Delhi, India
Spectrochim Acta A Mol Biomol Spectrosc 78:1507-14. 2011
..The macrocyclic ligand and all its metal complexes were also evaluated in vitro against some plant pathogenic fungi and bacteria to assess their biocidal properties...
- Nickel(II) complexes with different chromospheres containing macrocyclic ligands: spectroscopic and electrochemical studies
Sulekh Chandra
Department of Chemistry, Zakir Husain College, JL Nehru Marg, University of Delhi, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 65:215-20. 2006
..The Ni(II) complexes displayed Ni(II)/Ni(I) couples irreversible waves associated with Ni(III)/Ni(II) process...
- Spectroscopic approach in the characterization of the copper(II) complexes of isatin-3,2'-quinolyl-hydrazones and their adducts
Lokesh Kumar Gupta
Department of Chemistry, Zakir Husain College University of Delhi, JLN Marg, New Delhi 110 002, India
Spectrochim Acta A Mol Biomol Spectrosc 65:463-6. 2006
..On the basis of spectral studies a four coordinated square planer geometry is assigned for Cu(L)X type complexes whereas the adducts (Cu(L)X.2Y were found to have a six coordinated octahedral geometry...
- Spectroscopic techniques and cyclic voltammetry with synthesis: manganese(II) coordination stability and its ligand field parameters effect on macrocyclic ligands
Rajiv Kumar
Department of Chemistry, University of Delhi, New Delhi 110007, India
Spectrochim Acta A Mol Biomol Spectrosc 67:188-95. 2007
..Cyclic voltammetric studies indicate that complexes with all ligands undergoes one electron oxidation from manganese(II) to manganese(III) followed by a further oxidation to manganese(IV) at a significantly more positive potential...
- Spectroscopic studies on chromium(III), manganese(II), cobalt(II), nickel(II) and copper(II) complexes with hexadentate nitrogen-sulfur donor [N(2)S(4)] macrocyclic ligand
Deepak Shukla
Department of Chemistry, Zakir Husain College University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 71:746-50. 2008
..All of the complexes were found to possess six-coordinated geometry and are of high spin type...
- Spectroscopy: the study of DNA cleavage by newly synthesized polydentate macrocyclic ligand and its copper(II) complexes
Lokesh Kumar Gupta
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 71:496-501. 2008
..All the experimental results suggest that the complexes bind to DNA and also promote the cleavage plasmid pBR 322, in the presence of H2O2 and ascorbic acid...
- Spectral studies of coordination compounds of cobalt(II) with thiosemicarbazone of heterocyclic ketone
Sulekh Chandra
Department of Chemistry, Zakir Husain College, University of Delhi, J.L. Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:940-4. 2005
..Whereas sulfato complex was found to have five coordinate trigonal-bipyramidal geometry. All the complexes are of high spin type showing magnetic moment corresponding to three unpaired electrons...
- EPR, UV-vis, magnetic, spectral studies and electrochemical behaviour of mononuclear transition metal complexes derived from novel hexa-aza-macrotricyclic ligand
Sulekh Chandra
Department of Chemistry, Zakir Husain College (University of Delhi, J.L. Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 62:552-6. 2005
..Spectroscopic, and chemical characterizations of these systems are presented in this article. For Ni(II) complexes results on electron transfer processes measured by cyclic voltammetry and colourimetry have been studied...
- Synthesis, spectral and biological studies of nitrogen-sulphur donor macrocyclic ligands and their transition metals complexes
Shweta Verma
Department of Chemistry, Zakir Husain College University of Delhi, J L N Marg, New Delhi 110002, India shweta
Spectrochim Acta A Mol Biomol Spectrosc 74:370-4. 2009
..The ligands and their complexes were also screened in vitro against two pathogenic fungi (F. moniliformae and R. solani) to assess their growth inhibiting potential...
- Coordination stability between metal/ligands interaction by modern spectroscopic studies: IR, electronic, EPR and cyclic voltammetry of cobalt(II) complexes with organic skeleton containing cyclic ligands
Sulekh Chandra
Department of Chemistry, Zakir Husain College (University of Delhi, Jawahar Lal Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 65:852-8. 2006
..Also, the ratio between the cathodic peak current and square root of the scan rate is practically constant for the studied complexes...
- Spectral studies with coordination behaviour of (NO3) and (NCS) anions and EPR parameters of chromium(III) complexes which have different chromospheres macrocyclic ligands: synthesis and electronic spectroscopy
Sulekh Chandra
Department of Chemistry, Zakir Husain College University of Delhi Jawahar Lal Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 66:74-80. 2007
..lambda values indicate that the complexes under study have substantial covalent character and their g-values have also been calculated by using spin-orbital coupling constant (lambda)...
- Spectroscopic and physicochemical studies on nickel(II) complexes of isatin-3,2'-quinolyl-hydrazones and their adducts
Lokesh Kumar Gupta
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 66:972-5. 2007
..On the basis of spectral studies a four coordinated tetrahedral geometry is assigned for Ni(L)X type complexes whereas the adducts (Ni(L)X.2Y) were found to have a six coordinated distorted octahedral geometry...
- Spectroscopic characterization and EPR spectral studies on transition metal complexes with a novel tetradentate, 12-membered macrocyclic ligand
Lokesh Kumar Gupta
Department of Chemistry, Zakir Husain College, University of Delhi, JLN Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 65:792-6. 2006
..The complexes are of high spin type and possess four coordinate tetrahedral five coordinate square pyramidal and six coordinated octahedral/tetragonal geometry...
- Mössbauer and electronic spectral studies of iron(III) complexes of oximes
Sulekh Chandra
Department of Chemistry, Zakir Hussain College, University of Delhi, J L Nehru Marg, New Delhi 110002, India
Spectrochim Acta A Mol Biomol Spectrosc 59:755-60. 2003
..e. 5.92 BM. It may be due to the antiferromagnetic interaction between Fe(III) centers...
- Synthesis, structural and fungicidal studies of hydrazone based coordination compounds
Amit Kumar Sharma
Department of Chemistry, Ramjas College, University of Delhi, University Enclave, Delhi 110 007, India Department of Chemistry, Zakir Husain College, University of Delhi, J L Nehru Marg, New Delhi 110 002, India Electronic address
Spectrochim Acta A Mol Biomol Spectrosc 103:96-100. 2013
..e., Alternaria brassicae, Aspergillus niger and Fusarium oxysporum. The partial covalent character of metal-ligand bond is supported by the orbital reduction factor k (0.62-0.92) and nephalauxetic parameter β (0.55-0.57)...
- Magnetic, electronic and electrochemical studies of mono and binuclear Cu(II) complexes using novel macrocyclic ligands
Nidhi Gupta
National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi-110012, India
Spectrochim Acta A Mol Biomol Spectrosc 61:1175-80. 2005
..10-2.11. The room temperature magnetic moment values for the mononuclear complexes are in the range [mu(eff) = 1.70-1.72BM] and for the binuclear complexes the range is [mu(eff) = 1.46-1.59BM]...
