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Temperature‐dependent Raman spectroscopy of anilinium chloride near phase transition
Author(s) -
Vishwakarma Ashok K.,
Ghalsasi Pallavi,
Ghalsasi Prasanna S.
Publication year - 2011
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.201046440
Subject(s) - halide , raman spectroscopy , phase transition , alkyl , phase (matter) , hydrogen bond , ammonium chloride , chloride , chemistry , ammonium , spectroscopy , analytical chemistry (journal) , materials science , crystallography , inorganic chemistry , molecule , organic chemistry , optics , physics , condensed matter physics , quantum mechanics
The existence of various solid phases of organic ammonium halides, due to the presence of hydrogen bonding, has long been established but is limited to alkyl ammonium halides. On the other hand, the presence of such phase transitions was eluded in case of anilinium chloride. In the present work, we have undertaken a systematic temperature dependent Raman spectroscopic study on anilinium chloride, in the range 300–100–350 K. Spectral variation in the low frequency (100–400 cm −1 ) and high frequency (2500–3700 cm −1 ) regions around 350 and 260 K shows the signature of the phase transitions in this compound. These phase transitions were reversible in nature. The latter transition is in agreement with DSC measurements.