L. Siva Sankar Reddy

Publications (2)5.84 Total impact

• Article: Spectroscopic studies of atmospheric interest on NO and NO+

  R.R. Reddy, Y. Nazeer Ahammed, D. Baba Basha, K. Narasimhulu, L. Siva Sankar Reddy, K. Rama Gopal
  [show abstract] [hide abstract]
  ABSTRACT: In recent years, high-resolution photoelectron spectroscopy and ab initio calculations have considerably revised and enlarged the understanding of the electronic structure of the NO and NO+ molecules. The experimental potential energy curves for the different electronic states of atmospheric interest molecules like NO and NO+ are constructed by using the Rydberg–Klein–Rees method as modified by Vanderslice et al. The ground state dissociation energies are determined by curve fitting technique using the five parameter Hulburt–Hirschfelder (H–H) function. The estimated dissociation energies are 6.381 and 10.693 eV for NO and NO+, respectively. These values are in good agreement with the literature values. The r-centroids and Franck–Condon factors (FC Factors) for the band system of B2Πr–X2Π of NO and a3Σ+–X1Σ+, A1Π–X1Σ+ of NO+ molecules have been calculated employing an approximate analytical methods of Jarmain and Fraser, and Nicholls and Jarmain. The absence of the bands in these systems is explained.
  Journal of Quantitative Spectroscopy and Radiative Transfer 97(3):344-353. · 3.19 Impact Factor
• Article: Correlation between optical electronegativity, molar refraction, ionicity and density of binary oxides, silicates and minerals

  R.R. Reddy, K. Rama Gopal, Y. Nazeer Ahammed, K. Narasimhulu, L. Siva Sankar Reddy, C.V. Krishna Reddy
  [show abstract] [hide abstract]
  ABSTRACT: Molar refraction, ionicity and density values for binary oxides, SiO2 polymorphs, silicates and minerals have been evaluated from optical electronegativity. The validity of the proposed empirical relations has been tested in the case of silicates, binary oxides, SiO2 polymorphs and minerals. The estimated values of these parameters are in good agreement with the available literature values. There has been no report on the direct estimation of molar refraction, ionicity and density using the concept of optical electronegativity. Inclusion of optical electronegativity in the expressions has direct bearing on the concept of chemical bonding.
  Solid State Ionics 176:401-407. · 2.65 Impact Factor