Low-temperature Raman spectra of the 2-(alpha-methylbenzylamino)-5-nitropyridine crystal

作者：Pinheiro G S^*; Ferreira Junior M N G; dos Santos A O; Freire P T C; Lima J A Jr; Nogueira C E S; Cardoso L P; Sherwood J N; Remedios C M R

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2017, 183: 209-217.

DOI：10.1016/j.saa.2017.04.055

• Raman spectroscopy
• Low temperatures
• Phase transition

The polar organic 2-(alpha-methylbenzylamino)-5-nitropyridine crystal (MBANP) has been studied by Raman spectroscopy at low temperatures (from 300 to 10 K). The effect of temperature change on the vibrational spectrum is discussed with the aid of DFT calculations. The behavior of the Raman spectra indicates that MBANP molecules present a different conformation at low temperatures associated with the rotation of the phenyl and pyridine rings. Temperature -dependent X-ray measurements and differential scanning calorimetry (DSC) analysis were utilized as complementary techniques to investigate the structural stability of MBANP crystal.

• 出版日期2017-8-5