Low temperature photoluminescence and solvatochromic studies of organic hybrid 4-methoxybenzylammonium chloride (4-MBACl)

초록

We report temperature dependent photoluminescence (PL) and solvatochromic studies of 4-methoxybenzylammonium chloride (4-MBACl). The single crystals of 4-MBACl has been grown using slow solvent evaporation method under ambient conditions and have been confirmed using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopic studies. Thermal stability of the material has been analyzed by thermogravimetric (TG) and differential thermal analyzes (DTA). 4-MBACl crystal is photoluminescent with emission wavelength maximum at 300 nm. Exciton-phonon coupling in 4-MBACl is realized from temperature dependent PL studies. Changes in full width at half maximum (FWHM) of PL emission peak, intensity maximum (I-max) and wavelength maximum (lambda(max)) have been analyzed systematically between temperatures 290-10 K in order to understand the photophysical phenomenon behind the emission. Optical band gap (E-g) of 4-MBACl has been varied using solvent polarity, proticity and solution concentration. Interactions like OH-O, OH-pi and pi-pi stacking are explained to reason the notable shifts. (C) 2021 Elsevier B.V. All rights reserved.

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