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Thermal analysis, Raman scattering and infrared spectroscopy versus temperature of hydrogen bonds in sodium p‐nitrophenolate dihydrate (NPNa), [Na(C 6 H 4 ONO 2 )] · 2H 2 O
Author(s) -
Salah M. Ben,
Becker P.,
CarabatosNédelec C.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301830
Subject(s) - raman spectroscopy , hydrogen bond , chemistry , infrared spectroscopy , differential scanning calorimetry , analytical chemistry (journal) , atmospheric temperature range , raman scattering , infrared , crystallography , molecule , organic chemistry , thermodynamics , physics , optics
This work deals with the hydrogen bonds in p‐nitrophenolate sodium dihydrate (NPNa). Differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) were performed in the temperature range 293–673 K (20–400 °C) in order to control the dehydration process and decomposition of the crystal. The energy necessary to break each type of hydrogen bond has been determined. The O…O vibration of the two hydrogen bonds, denoted O…O1 and O…O2, have been studied by Raman spectroscopy versus temperature. The O–H stretching modes of hydrogen bonds have been also identified in infrared and micro‐Raman spectra. Raman spectra functions of temperature allowed to evidence an order‐disorder transition at ca 138 K related to the molecular configuration in the lattice.