H
Hema Tresa Varghese
Researcher at Fatima Mata National College
Publications - 128
Citations - 2824
Hema Tresa Varghese is an academic researcher from Fatima Mata National College. The author has contributed to research in topics: Hyperpolarizability & Raman spectroscopy. The author has an hindex of 28, co-authored 128 publications receiving 2405 citations. Previous affiliations of Hema Tresa Varghese include Mar Ivanios College.
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FT-IR, FT-Raman and SERS spectra of pyridine-3-sulfonic acid.
TL;DR: FT-IR and FT-Raman spectra of pyridine-3-sulfonic acid are recorded and analysed and a likely 'perpendicular orientation' of the molecule on the silver surface is suggested.
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Vibrational spectroscopic studies and ab initio calculations of 5-methyl-2-(p-fluorophenyl)benzoxazole.
K.R. Ambujakshan,V.S. Madhavan,Hema Tresa Varghese,C. Yohannan Panicker,Ozlem Temiz-Arpaci,Betul Tekiner-Gulbas,Ilkay Yildiz +6 more
TL;DR: 2-hydroxy-5-nitro aniline with p-fluorobenzoic acid in polyphosphoric acid is prepared and the FT-IR spectrum is recorded and analysed and the vibrational frequencies and corresponding vibrational assignments are examined theoretically using the Gaussian03 set of quantum chemistry codes.
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Raman, IR and SERS spectra of methyl(2-methyl-4,6-dinitrophenylsulfanyl)ethanoate
C. Yohannan Panicker,Hema Tresa Varghese,Daizy Philip,Helena I. S. Nogueira,Katerina Castkova +4 more
TL;DR: Methyl(2-methyl-4,6-dinitrophenylsulfanyl)ethanoate was prepared by nucleophilic substitution and the molecule is adsorbed on the silver surface with the benzene ring in a 'tilted orientation'.
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IR, Raman and SERS Spectra of 2-(Methoxycarbonylmethylsulfanyl)-3,5-dinitrobenzene Carboxylic Acid
Asha Raj,Hema Tresa Varghese,Carlos M. Granadeiro,Helena I. S. Nogueira,C. Yohannan Panicker +4 more
TL;DR: In this paper, a surface enhanced Raman scattering (SERS) spectrum was recorded on a silver colloid and the vibrational wavenumbers were computed by density functional theoretical (DFT) computations at the B3LYP/6-31G* level and they were found to be in good agreement with the experimental values.
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IR, Raman and SERS studies of methyl salicylate.
TL;DR: The vibrational wave numbers of the compound have been computed using the Hartree-Fock/6-31G* basis and compared with the experimental values to suggest a flat orientation of the molecule at the metal surface.