Experimental and quantum chemical studies on NH O hydrogen bonded helical chain type Morpholinium 2-chloro-4-nitrobenzoate: A phasematchable organic nonlinear optical material

Add time:07/21/2019    Source:sciencedirect.com

We report on the studies performed on Morpholinium 2-chloro-4-nitrobenzoate (M2C4N), a second order nonlinear optical (NLO) material, which has been proved to crystallize with chiral structure as compared to its other two variants. The synthesized powder was studied for its composition, crystalline phase and NLO efficiency and phasematchability. The solubility and the metastable zone width (MSZW) of the title compound were measured for the growth of bulk crystals of M2C4N. A smoky pattern observed in the middle region of the crystals that could prevent it from optical applications was greatly reduced, through suitable modifications in the growth process. The optical properties such as luminescence and laser damage threshold resistance were studied for the bulk crystals whereas the molecular vibrations of M2C4N were studied through Fourier transform infrared (FTIR) and FT-Raman spectral analysis using the polycrystalline powders derived from the single crystals. In addition, quantum chemical studies on M2C4N molecule were performed by using density functional theory (DFT) at the B3LYP/6-311++G (d, p) basis set. These studies showed that the M2C4N is a phasematchable NLO crystal and could be used for device fabrication.

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