Optical properties of 2-aminopyridine potassium dihydrogen phosphate cadmium chloride

Abstract

A good-optical-quality crystal of 2-aminopyridine potassium dihydrogen phosphate cadmium chloride (2APKDPC) was grown through the slow evaporation technique at room temperature. The transparent and defectless bulk crystal of 2APKDPC with dimensions of 23 × 10 × 5 mm3 was grown through the solution growth method in a period of 90–95 d. From the single-crystal X-ray diffraction study, the measured lattice parameter values were a = 7·49 Å, b = 7·49 Å, c = 7·03 Å, α = β = γ = 90° and volume V = 394 Å3, which show that the grown 2APKDPC crystal belonged to the tetragonal crystal system. The crystalline nature of the grown crystal was confirmed by powder X-ray diffraction analysis. Fourier transform infrared analysis was carried out to identify metal coordination and the presence of various functional groups in the 2APKDPC crystal. In the recorded optical transmission spectrum, the ultraviolet cutoff wavelength was found to be 237 nm, and the optical energy bandgap value was also found from the absorption studies.