Abstract
The appearance and formation of an isosbestic point in the temperature-dependent IR spectra can be used to reveal a phase transition at a certain temperature. This conclusion was made by a thorough investigation of the IR (transmission and ATR) spectra of methylammonium iodide (MAI) and formamidinium iodide (FAI) recorded in a wide temperature range starting from -170 to +200°C. By investigating the isosbestic points, it was found that MAI undergoes two phase transitions at -110 and +146°C. The results obtained for FAI also showed two phase transitions at 73 and 115°C. Furthermore, it was found that the shift of certain bands that are provoked by the phase change could be used to calculate the transition temperature. So far, according to the literature data, no attempts have been made to reveal the exact temperature of phase transitions using IR spectroscopic techniques.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
