Growth and characterization of nonlinear optical crystal Bis Thiourea Zinc Acetate (BTZA) in the presence of l-Proline

Single crystal of 2 mol% l-Proline doped Bis Thiourea Zinc Acetate (BTZA), a semi organic nonlinear optical material has been grown using slow evaporation technique. Good quality single crystal with dimension 11 × 7 × 3 mm3 was harvested after 30 days. The influence of amino acid l-Proline was studied for 1, 2 and 3 mol% l-Proline doped BTZA using Kurtz and Perry powder second harmonic generation test. This was compared with pure BTZA which confirms the enhancement of second harmonic generation property of l-Proline doped BTZA. Better enhancement was found in 2 mol% l-Proline doping. The grown crystal was characterized using single crystal X-ray diffraction, Fourier Transform Infra Red spectroscopy (FTIR) analysis, UV–Visible absorption and thermogravimetric analysis.

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► The effect of l-Proline on the growth of BTZA single crystal was studied.
► The interaction of dopants with BTZA molecule was studied using Fourier transform infrared spectra.
► Mechanical stability, transmittance and SHG efficiency of doped BTZA is better than pure BTZA.