Spectroscopic Investigations on New Organic NLO crystal – 2-amino-5-chloropyridinium-2,4-dinitrophenolate

Abstract New organic single crystals of 2-amino-5-chloropyridinium-2,4-dinitrophenolate were successfully grown by the slow evaporation method at room temperature from methanol solution. Crystal structure and crystalline phases were confirmed from the single crystal XRD and powder XRD, respectively. 1 H NMR and 13 C NMR studies were conducted for the crystal. The functional groups have been confirmed using the Fourier transform infrared (FTIR) analysis. UV-visible studies show the absence of absorption in the visible region. To determine the thermal stability of the grown crystals it was subjected to thermo gravimetric analysis and differential thermal analysis. Dielectric studies were taken in the frequency range from 50 Hz to 5 MHz for various temperatures. Photo conductivity and photoluminescence studies were also carried out for the title crystal. The second harmonic generation (SHG) efficiency of the grown crystals was 11.37 times greater than that of the reference KDP. Particle size dependent phase matching studies were also investigated. The nonlinear refractive index ( n 2 ) and nonlinear absorption coefficient ( β ) were also measured by Z-Scan studies.

Hali tarjima qilinmagan