Investigation of physicochemical properties, photoluminescence, laser damage threshold, antimicrobial, NLO activity of L-proline manganese chloride monohydrate for optoelectronic applications

Abstract

Organometallic single crystal of L-proline manganese chloride monohydrate (LPMCM) was synthesized and crystallized from slow solvent evaporation techniques at room temperature. Single crystal XRD study was used to find the various structure parameters of the grown single crystal. The grown crystals were characterized by powder XRD studies and its diffraction patterns were indexed using AUTOX 93 software. All the presented functional groups were identified by FT-IR and FT-Raman spectral analysis. Optical properties of the grown LPMCM crystal were investigated by UV–Vis–NIR spectroscopy. The luminescence property of the grown crystal was recorded using photoluminescence spectroscopy. Second harmonic generation efficiency of the grown crystal is about 0.7 times that of urea. The laser-induced surface damage threshold value for the LPMCM crystal was measured using Nd: YAG laser. The mechanical behavior of the LPMCM crystal was estimated by Vickers microhardness tester. The dielectric constant and dielectric loss of the crystals were calculated at different temperature. Thermal stability of the LPMCM crystal was determined by thermogravimetric and differential scanning calorimetric analyses. Chemical etching analysis has been employed to study the inclusions or impurities present in the grown crystal. The antimicrobial activity of the grown crystal was studied against one Gram-positive (Staphylococcus aureus) and one Gram-negative (Escherichia coli) bacteria. Due to the presence of metal ion coordination in the LPMCM crystal, it has led to the prominent effect on the antimicrobial activity of the LPMCM single crystal.