Articles written in Pramana – Journal of Physics
Volume 36 Issue 2 February 1991 pp 151-161
Libratory modes of water molecules in tutton salts
Shashi P Gupta Y Kumar B N Khanna
The existence of rocking, wagging and twisting librations of different types of water molecules in tutton salts has been established from their ir spectra. These bands have been identified, following the intensity criterion of Miyazawa. The present assignments indicate that the bands due to libratory motion of H2O III in NH4Mn-, KNi-, KCo and KMn- and of H2O I in KMn- and KCu- tutton salts are out-of-plane H-bonded. The strength of the hydrogen bonding is the weakest in the (NH4)2Fe(SO4)2.6H2O.
Volume 39 Issue 2 August 1992 pp 157-161
Surface enhanced Raman scattering of 2-cyanopyridine adsorbed on silver colloidal particles
Ekram Ali Shaikh Y Kumar B N Khanna
Surface-enhanced Raman scattering (SERS) spectra of 2-cyanopyridine (2 CP) adsorbed on silver colloidal particles have been investigated. The prominent SERS bands are observed at 556, 612, 778, 1002, 1060, 1072, 1150 and 1240 cm−1. The absolute enhancement factor of the Raman signals in SERS studies has been estimated to be of the order of 102–105 for various bands. The 2CP molecules have been ascribed to adsorb on colloidal particles in standing up fashion.
Volume 39 Issue 6 December 1992 pp 597-614
Inelastic light scattering in strontium borate glasses in the system
M H Rahman B P Dwivedi Y Kumar B N Khanna
Raman spectra of strontium borate binary glasses in the system
Volume 97, 2023
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