Items where Author is "Umapathy, S."

Mohapatra, Himansu ; Umapathy, S. (2010) Time-resolved resonance raman studies on proton-induced electron-transfer reaction from triplet excited state of 2-methoxynaphthalene to decafluorobenzophenone The Journal of Physical Chemistry A, 114 (47). pp. 12447-12451. ISSN 1089-5639

Fathima Parveen, M. ; Umapathy, S. ; Dhanalakshmi, V. ; Anbarasan, R. (2010) Synthesis and characterizations of nanosized iron(II) hydroxide and iron(II) hydroxide/poly(vinyl alcohol) nanocomposite Journal of Applied Polymer Science, 118 (3). pp. 1728-1737. ISSN 0021-8995

Mathavan, T. ; Umapathy, S. ; Jothirajan, M. A. ; Fatima Parveen, M. ; Vivekanandam, T. S. ; Soni, Ajay ; Okram, G. S. ; Ganesan, V. (2010) The unusual electrical response in polyaniline-threonine composites Materials Letters, 64 (18). pp. 2009-2011. ISSN 0167-577X

Umapathy, S. ; Mallick, B. ; Lakshmanna, A. (2010) Mode-dependent dispersion in Raman line shapes: observation and implications from ultrafast Raman loss spectroscopy The Journal of Chemical Physics, 133 (2). 024505_1-024505_6. ISSN 0021-9606

Fathima, Parveen M. ; Umapathy, S. ; Dhanalakshmi, V. ; Anbarasan, R. (2010) Synthesis and Characterization of Nano-sized Zn(OH)2 and Zn(OH)2/PVA Nano-composite Composite Interfaces, 17 (8). pp. 757-774. ISSN 0927-6440

Fathima Parveen, M. ; Umapathy, S. ; Dhanalakshmi, V. ; Anbarasan, R. (2009) Synthesis and characterizaion of nanosized Mg(OH)₂ and its nanocomposite with poly (vinyl alcohol) Nano, 4 (3). pp. 147-156. ISSN 1793-2920

Fathima Parveen, M. ; Umapathy, S. ; Dhanalakshmi, V. ; Anbarasan, R. (2009) Synthesis and characterizations of nano-sized Ni(OH)₂ and Ni(OH)₂/poly(vinyl alcohol) nano composite Journal of Materials Science, 44 (21). pp. 5852-5860. ISSN 0022-2461

Deckert, V. ; George, M. W. ; Umapathy, S. (2008) Raman spectroscopy at the beginning of the Twenty-First Century Journal of Raman Spectroscopy, 39 (11). pp. 1508-1511. ISSN 0377-0486

Chowdary, P. D. ; Umapathy, S. (2008) Ultrafast dynamics and photochemistry of π-π* excited trans- azobenzene-a comprehensive analysis of resonance Raman intensities Journal of Raman Spectroscopy, 39 (11). pp. 1538-1555. ISSN 0377-0486

Jothi Rajan, M. A. ; Mathavan, T. ; Vivekanandam, T. S. ; Umapathy, S. ; Ganesan, V. ; Okram, G. S. ; Soni, Ajay (2008) Sonochemical synthesis of poly (methyl acrylate) Solid State Phenomena, 136 . pp. 175-190. ISSN 1012-0394

Vivekanandam, T. S. ; Gopalan, A. ; Vasudevan, T. ; Umapathy, S. (2005) Sonochemical cyclopolymerization of diallylamine in the presence of peroxomonosulfate Journal of Applied Polymer Science, 98 (4). pp. 1548-1553. ISSN 0021-8995

Jothi Rajan, M. A. ; Thaddeus, Arockiam ; Mathavan, T. ; Vivekanandam, T. S. ; Umapathy, S. (2005) Construction of a low cost photoacoustic spectrometer for characterization of materials Macromolecular Symposia, 222 (1). pp. 287-296. ISSN 1022-1360

Abraham, B. ; Sastri, C. V. ; Maiya, B. G. ; Umapathy, S. (2004) Resonance Raman spectroscopic studies of [Ru(phen)₂qdppz]²⁺ and its interactions with calf thymus DNA Journal of Raman Spectroscopy, 35 (1). pp. 13-18. ISSN 0377-0486

Kwok, W. M. ; Ma, C. ; Matousek, P. ; Parker, A. W. ; Phillips, D. ; Toner, W. T. ; Towrie, M. ; Umapathy, S. (2001) A determination of the structure of the intramolecular charge transfer state of 4-dimethylaminobenzonitrile (DMABN) by time-resolved resonance Raman spectroscopy The Journal of Physical Chemistry A, 105 (6). pp. 984-990. ISSN 1089-5639

Kwok, W. M. ; Gould, I. ; Ma, C. ; Puranik, M. ; Umapathy, S. ; Matousek, P. ; Parker, A. W. ; Phillips, D. ; Toner, W. T. ; Towrie, M. (2001) Vibrational studies of ground state 4-dimethylaminobenzonitrile (DMABN) and its ring deuterated isotopomer DMABN-d₄ Physical Chemistry Chemical Physics, 3 (12). pp. 2424-2432. ISSN 1463-9076

Anandhi, R. ; Umapathy, S. (2000) Intermolecular hydrogen abstraction from triplet excited state of decafluorobenzophenone: a Raman investigation Journal of Raman Spectroscopy, 31 (4). pp. 331-338. ISSN 0377-0486

Vivekanandam, T. S. ; Gopalan, A. ; Vasudevan, T. ; Umapathy, S. (2000) Sonochemical cyclopolymerization of diallylamine European Polymer Journal, 36 (2). pp. 385-392. ISSN 0014-3057

Balakrishnan, G. ; Umapathy, S. (1999) Photogenerated radical intermediates of vitamin K₁: a time-resolved resonance Raman study Journal of Molecular Structure, 475 (1). pp. 5-11. ISSN 0022-2860

Vivekanandama, T. S. ; Gopalan, A. ; Vasudevana, T. ; Umapathy, S. (1999) Polymerization of acrylamide in the presence of peroxodisulfate and ultrasound Polymer, 40 (3). pp. 807-811. ISSN 0032-3861

Anandhi, R. ; Umapathy, S. (1998) Resonance Raman spectroscopic studies on the conducting state of polyvinylcarbazole and its model compounds Journal of Raman Spectroscopy, 29 (10-11). pp. 901-906. ISSN 0377-0486

Lednev, I. K. ; Yea, T.-Q. ; Matousek, P. ; Towrie, M. ; Foggi, P. ; Neuwahl, F. V. R. ; Umapathy, S. ; Hestera, R. E. ; Moore, J. N. (1998) Femtosecond time-resolved UV-visible absorption spectroscopy of trans-azobenzene: dependence on excitation wavelength Chemical Physics Letters, 290 (1-3). pp. 68-74. ISSN 0009-2614

Anandhi, R. ; Rajesh, C. S. ; Das, Suresh ; Umapathy, S. (1997) Transient absorption studies on 3,6-dibromo polyvinylcarbazole and its model compounds Journal of Photochemistry and Photobiology A: Chemistry, 106 (1-3). pp. 135-139. ISSN 1010-6030

Balakrishnan, G. ; Umapathy, S. (1997) Intermolecular hydrogen atom abstraction from the fluoranil triplet excited state: a Raman study Chemical Physics Letters, 270 (5-6). pp. 557-563. ISSN 0009-2614

Biswas, N. ; Umapathy, S. ; Kalyanaraman, C. ; Sathyamurthy, N. (1995) Resonance Raman intensity analysis of polyatomic molecules Proceedings of the Indian Academy of Sciences - Chemical Sciences, 107 (3). pp. 233-244. ISSN 0253-4134

Umapathy, S. ; Cartner, A. M. ; Parker, A. W. ; Hester, R. E. (1990) Time-resolved resonance Raman spectroscopic studies of the photosensitization of colloidal titanium dioxide The Journal of Physical Chemistry, 94 (26). pp. 8880-8885. ISSN 0092-7325

Umapathy, S. ; Hester, R. E. (1990) Laser Raman spectroscopy of colloidal semiconductor photosensitizers Proceedings of the Indian Academy of Sciences - Chemical Sciences, 102 (5). pp. 613-628. ISSN 0253-4134

Umapathy, S. ; Hester, R. E. (1990) Raman spectroscopic studies of polypryrrole on colloidal TiO₂: evidence for bipolarons Journal of Molecular Structure, 224 . pp. 113-119. ISSN 0022-2860

Umapathy, S. ; McQuillan, A. J. ; Hester, R. E. (1990) An in situ resonance Raman and infrared spectroscopic study of hexacyanoferrate (II) ion adsorbed to aqueous colloidal TiO₂ Chemical Physics Letters, 170 (1). pp. 128-132. ISSN 0009-2614

Umapathy, S. ; Lee-Son, G. ; Hester, R. E. (1989) Raman spectroscopic studies of substituted bipyridines, their ruthenium(II) complexes and surface-derivatized TiO₂ Journal of Molecular Structure, 194 . pp. 107-116. ISSN 0022-2860

Umapathy, S. ; Kesavasamy, K. ; Krishnamurthy, N. (1980) Second order Raman spectrum of carbon disulphide in the condensed phase Journal of Raman Spectroscopy, 9 (3). pp. 144-149. ISSN 0377-0486