Synthesis, growth, thermal and optical studies on third order nonlinear optical material (E)-2-{3-[2-(4-chlorophenyl) vinyl]-5,5-dimethylcyclo-hex-2-en-1-ylidene}malononitrile for optoelectronic application

A new polyene like organic molecule (E)-2-(3[2-(4-chlorophenyl) vinyl]-5,5-dimethylcyclo-hex-2-en-1-ylidene}malononitrile (Cl-1) was synthesized by knoevenagel condensation method. The Cl-1 Single crystals were successfully grown by the slow evaporation method at a constant temperature 35 degrees C. Single crystal XRD confirms the Cl-1 molecule belongs to monoclinic crystal system and space group P2(1)/C with a = 10.114, b = 11.127, c = 14.929 and V= 1668.9 and Z= 4. The grown Cl-1 crystals were subjected to FTIR and C-13 NMR studies to confirm the synthesized compound. The linear optical property of Cl-1, crystal has been studied using UV-Vis-NIR spectroscopy in the wavelength range 190 nm-1100 nm. The thermal properties of Cl-1 crystal were studied by using TG and DTA analysis. The refractive index of Cl-1 crystal has measured using Abbe's refractometer and found to be 1.648. The third order nonlinear optical property of Cl-1 crystal has been investigated using Z-scan technique with He-Ne laser. Photoluminescence (PL) spectrum of Cl-1 crystal was carried out using xenon lamp, which shows high intense emission peak at wavelength 614 nm. Laser optical damage threshold (LDT) of Cl-1 crystal has studied using Nd-YAG laser (10 Hz, 420 mJ, 1064 nm). (C) 2013 Elsevier B.V. All rights reserved.