Effect of KOH on glycine phosphite single crystal grown by the SR method

The pure glycine phosphite (pure-GPI) and a new potassium hydroxide doped glycine phosphite (KOH-GPI) single crystals have been grown from aqueous solution by slow evaporation and Sankaranarayanan and Ramasamy method (SR method). The colorless KOH-GPI crystal with cylindrical shape about 15 mm diameter and 49 mm length was obtained by the SR method. The formation of KOH-GPI has been confirmed by single crystal X-ray diffraction by comparing with pure GPI. Its crystalline perfection was assessed by High resolution X-ray diffraction (HRXRD) studies. The fourier transform infrared spectroscopy (FTIR) studies and UV–visible transmission and absorption spectrum analysis were carried out for KOH-GPI and it is compared with pure GPI. From the dielectric studies, at the frequency value of 1000 KHz, the curie temperature of pure GPI and KOH-GPI was found to be 228.44 and 240.90 K respectively. The KOH-GPI shows high curie temperature value comparing with pure GPI. The results will be discussed in detail.

► KOH doped GPI single crystal has been grown by the SR method for the first time and confirmed by XRD.
► Dielectric studies of KOH-GPI shows high curie temperature value comparing with pure GPI.
► The crystal structure of SR method grown pure and KOH doped GPI crystal was analyzed from HRXRD data.
► The optical property of both samples was studied by the UV–visible spectrum.