Synthesis and characterization of semi-organic nonlinear optical material: Sodium para-nitrophenolate para-nitrophenol dihydrate

摘要

Single crystal of sodium para-nitrophenolate para-nitrophenol dihydrate (SPPD) was grown using slow evaporation solution growth technique with the crystal dimensions of 17 mm x 11 mm x 6 mm. The structure of the SPPD crystal was examined by X-ray diffraction analysis and the functional groups, hydrogen bonding interactions were identified using FT-IR and FT-Raman spectra. The UV-vis-NIR absorption spectrum revealed that the UV lower cut-off wavelength was 260 nm and the optical band gap of the crystal was 4.76 eV. The material was thermally stable up to 128 degrees C as determined by the TG-DTA curves. The mechanical behavior of the grown crystal was studied using Vickers microhardness. Dielectric constant and dielectric loss were also measured as a function of frequency between 5 Hz and 5 MHz and temperature between 40 and 100 degrees C, respectively. The second-harmonic generation efficiency was found to be five times greater than that of KDP. The third-order nonlinear parameters such as nonlinear refractive index (n(2)), nonlinear absorption coefficient (beta) and third-order susceptibility vertical bar chi((3))vertical bar were calculated using Z-scan technique. (C) 2016 Elsevier GmbH. All rights reserved.