Growth and characterization of semi-organic nonlinear optical crystal: Sodium 2,4-dinitrophenolate monohydrate

• Relative second harmonic conversion efficiency of SDNP crystal has 2.5 times greater than the urea.
• First order hyperpolarizability of SDNP molecule is 22.7 times greater than the standard urea.
• Grown crystal has wider transparency in the region of visible and NIR.

Sodium 2,4-dinitrophenolate monohydrate salt has been synthesized and the crystals have been grown in aqueous solution by slow evaporation solution growth technique. Grown crystal was confirmed by powder XRD studies. Functional groups presented in the grown crystal were identified and their vibrational properties were studied by recording FTIR spectrum. Thermal stability of the grown crystal was deliberated by recording TGA/DTA. Existence of the ionic form in the crystal was confirmed and the energy gap of the crystal was also calculated by analyzing UV–VIS–NIR spectrum. Second harmonic frequency generation was examined by Kurtz and Perry powder test and it reveals that the relative conversion efficiency was 2.5 times greater than the urea. Theoretical first order hyperpolarizability value was calculated for the optimized structure.

Optimized structure of SDNP.Figure optionsDownload as PowerPoint slide