Studies on vibrational,thermal, optical,dielectric and mechanical properties of a molecular salt: 2-Methylimidazolium hydrogen succinate

Good quality single crystal of 2-methylimidazolium hydrogen succinate (2MISA) was grown by slow evaporation solution growth method. The grown crystal was investigated using various characterization techniques to study its properties. Single crystal of 2MISA was confirmed by single crystal XRD. The high resolution X-ray diffraction curve shows the structural perfection of the grown crystal. Factor group analysis predicts 153 possible modes of vibrations. IR and Raman measurements confirm the functional groups present in the title crystal. From the UV–vis spectrum the optical bandgap and refractive index were evaluated. The PL spectrum of the title compound shows green emission. Dielectric tensorial behavior of the grown single crystal was studied with varying frequencies. The thermal stability of 2MISA was analyzed using TGA/DTA measurements, which infer the thermally stability. Mechanical stability of the grown crystal was studied by Vickers hardness tester.