Access Restriction

Author Jayasree, R. S. ♦ Bushiri, M. J. ♦ John, Annie ♦ Nayar, V. U.
Source Sree Chitra Tirunal Institute for Medical Sciences & Technology
Content type Text
Publisher Spectrochimica Acta Part A-molecular and Biomolecular Spectroscopy
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health ♦ Diseases
Subject Domain (in MeSH) Diagnosis ♦ Analytical, Diagnostic and Therapeutic Techniques and Equipment
Subject Keyword Radiology
Abstract Polarized Raman spectral changes with respect to temperature were investigated for Pr(BrO3)(3)center dot 9H(2)O single crystals. FTIR spectra of hydrated and deuterated analogues were also recorded and analysed. Temperature dependent Raman spectral variation have been explained with the help of the thermograms recorded for the crystal. Factor group analysis could propose the appearance of BrO3 ions at sites corresponding to C-3v (4) and D-3h (2). Analysis of the vibrational bands at room temperature confirms a distorted C3v symmetry for the BrO3 ion in the crystal. From the vibrations of water molecules, hydrogen bonds of varying strengths have also been identified in the crystal. The appearance v(1) mode of BrO3- anion at lower wavenumber region is attributed to the attachment of hydrogen atoms to the BrO3 anion. At high temperatures, structural rearrangement is taking place for both H2O molecule and BrO3 ions leading to the loss of water molecules and structural reorientation of bromate ions causing phase transition of the crystal at the temperature of 447 K. (c) 2005 Elsevier B.V. All rights reserved.
Education Level UG and PG
Learning Resource Type Article
Educational Framework Medical Council of India (MCI)
Volume Number 64
Issue Number 2
Page Count 8
Starting Page 518
Ending Page 525