Synthesis, growth, investigation of structural, spectral and optical properties of solution grown dipotassium fumarate dihydrate crystal

Abstract

Single crystals of dipotassium fumarate dihydrate (DKFD) have been grown by slow solvent evaporation method. The structural characteristics of the grown crystals was studied from single crystal and powder X-ray diffraction analysis. The crystal system of the grown crystal was found to be monoclinic. The lower cut-off wavelength of DKFD was found at 300 nm and good transparency window was observed from 300 to 1100 nm. The existence of various functional groups was established from FTIR and FT Raman spectroscopy. The study of the molecule is established using NMR spectroscopy. The thermal stability and decomposition behaviour of the grown crystal is analysed using TGA/DTA analyses. Third order nonlinear susceptibility χ 3 of the crystal was measured at the wavelength of 532 nm by z-scan technique. The observed high value of χ 3 is attributed to the hydrogen bond present in the structure of the crystal.