Electron Paramagnetic Resonance, double resonance, Nuclear Magnetic Resonance, optical, electrochemical and molecular orbital studies of organic radicalsand transition metal complexes. Additional research interests include 2D NMR techniques.
"Extended Diaryl Diselenide Radical Cations in Pentasil Zeolite Studied by EPR and DR", P. S. Lakkaraju, K. Shen, H. D. Roth H. Garcia, submitted to Chemical Communications
"Oxidative Ring Contraction of 2-Phenyl-1,3-dithine in ZSM-5. Restricted Mobility of 1,2-Dithiolane Radical Cation in Zeoite Channels", H. D. Roth, K. Shen, P. S. Lakkaraju, L. Fernandez, Chemical Communications, 1998, 2447
"Oxidative Cyclization of Diphenyl Disulfide in a Pentasil Zeolite: An EPR Study", P. S. Lakkaraju, D. Zhou, H. D. Roth, Journal of the Chemical Society, Perkin Transactions 2, 1998, 1119
"Medium- and Sentizer- Dependent Radical Cation Reactions: Deprotonation in Fluid Solution and Solid Matrices", H. D. Roth, H. Weng, D. Zhou, P.S. Lakkaraju, Acta Chemica Scandinavica, 1997, 51, 626
"Oxidation and Dehydrogenation of a Phenol ether in a Pentasil Zeolite (NaZSM-5): An EPR Study", P. S. Lakkaraju, D. Zhou, H.D. Roth, Chemical Communications, 1996, 2605
"Generation and EPR of Hexamethyl(Dewar)benzeneRadical Cation at Room Temperature", H. D. Roth, P. S. Lakkaraju, J. J. Zheng, Journal of the Chemical Society, Chemical Communications, 1994, 1969
"Homoconjuction in radical Cations of 7-Substituted Quadricyclane and norbornadiene", H. D. Roth, X. -M. Du, H. Weng, P. S. Lakkaraju, C. J. Albelt, Journal of the American Chemical Society, 1994, 116, 7744
"EPR of Iminoxyl Radicals in Restricted Media: Direct Evidence for the Assignment Z- and E- Isomers", P. S. Lakkaraju, J. Zhang, H. D. Roth, Journal of Physical Chemistry, 1994, 98, 2722
“Generation and EPR of Iminoxyl Radicals in a Pentasil Zeolite”, P. S. Lakkaraju, J. Zhang, H. D. Roth, Journal of the Chemical Society Perkin Transactions, 1993, 2319.
"Ab-initio Studies of Radical Cations Derived from Hexa-1,5-diene Systems – Semibullvalene”, H. D. Roth, P. S. Lakkaraju, Journal of Physical Chemistry, 1993, 13403.
“Studies on Gold(II) Complexes with Hard and Soft Donor Ligands. IV. A Reactivity Study in Solution Using EPR Spectroscopy”, A. P. Koley, P.S. Lakkaraju, P.T. Manoharan, S. Ghosh, Inorganic Chimica Acta, 1992, 194, 219.
“Studies on Gold (II) Complexes with Hard and Soft Donor Ligands. III. Complexes with N-(2-Pyridylmethyl)-2-mercaptoaniline”, A. P. Koley, R. Nirmala, P. S. Lakkaraju, S. Ghosh, P.T. Manoharan, Inorganic Chemitry, 1992, 31, 1764.
“Studies on Gold(II) Complexes with Hard and Soft Donor Lligands. II. Complexes o-(methylthio)aniline and 1,2-bis((aminophenyl)thio)ethane”, A. P. Koley, S. Purohit, P. S. Lakkaraju, S. Ghosh, P. T. Manoharan, Inorganic Chemistry, 1992, 31, 305.
“Chemistry of Molybdenum with Hard and Soft Donor Ligands 2. Complexes with Molydenum(VI), -(V), and (IV) oxo complexes with tridentate schiff base ligands”, S. Purohit, A. P. Koley, P. S. Lakkaraju, P. T. Manoharan, Inorganic Chemistry, 1989, 28, 3875.
"Studies on Gold(II) Complexes with Hard and Soft Donor Ligands. I. Complexes with o-Aminobenzenethiol”, A. P. Koley, S. Purohit, S. Ghosh, P. S. Lakkaraju, P. T. Manoharan, Journal of the Chemical Society, Dalton Transactions, 1988, 2607. Corrections to this manuscript were published ibid, 1989, 555.
“EPR Study of Radical Cations of Short Chain Polyenes”, P. S. Lakkaraju, R. -S Ding, E. G. Bradford, L. D. Kispert, H. -Q. Wang, Israeli. Journal of Chemistry, 1989, 29, 33.
“An EPR Study of Monomeric and Dimeric Radical Cations of 2,5-dimenty1-2,4-hexadiene and 2,7-dimethyl-2,4,6-octatriene”, P. S. Lakkaraju, R. -S. Ding, H. -Q. Wang, E. G. Bradford, L. D. Kispert, Chemical Physics Letters, 1988, 151, 443.
“Zerofield Tensor for Ni(II) in Zn(ethylenediamine),(NO,-),: EPR Study”, P. S. Lakkaraju, S. J. Subramanian, Chemical Physics, 1988, 88, 43.
“EPR of VO” in Zn(antipyrene),(NO;),: On the Orientation of Vanadyl Doped in a Low Symmetry Crystal Field”, P. S. Lakkaraju, S. J. Subrarnanian, Chemical Physics, 1987, 86, 629.
“EPR of Ni(I) Radiolytically Produced in Ni(II) Doped Cd(imidazole),SO,.H,O”, P. S. Lakkaraju, S. J. Subramanian, Molecular Physics, 1986, 57, 543.
"On the Charge Compensation Effects in Mn(II) Doped (NH,),SbF,: EPR Study”, P. S. Lakkaraju, S. J. Subramanian, Journal of Chemical Physics, 1985, 83, 1485.
“EPR Study of Pseudo-V, Center [CrO,C1-CrO,C1] in Irradiated KCrO,C1”, P. S. Lakkaraju, S. J. Subramanian, Molecular Physics, 1983, 48, 645.
Recent EPR Spectra