Crystal Growth and Thin Film Laboratory, School of Physics, Bharathidasan University, Tiruchirappalli, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Mar;78(3):935-41. doi: 10.1016/j.saa.2010.11.041. Epub 2010 Dec 7.
The organic nonlinear optical material of 4-bromo-4'chloro benzylidene aniline (BCBA) was synthesized and single crystal of BCBA was grown from acetone solution by solvent evaporation method at room temperature. Its three dimensional structure was elucidated from single crystal X-ray diffraction analysis at 173 K. Synthesized compound of BCBA was subjected to FTIR and (1)H and (13)C NMR spectral analyses. The range and percentage of optical transmission of BCBA was determined by UV-vis-NIR spectrum and its fluorescence spectrum was recorded using spectrofluorometer. The mechanical strength of the crystal was estimated using Vickers microhardness test on the (001) plane. Dielectric constant of the grown crystal was measured for various frequencies along (001) plane. The third order nonlinear optical properties of BCBA were investigated by Z-scan technique with He-Ne laser radiation of wavelength at 632.8 nm and the corresponding nonlinear refractive index, absorption coefficient and optical susceptibility were calculated.
4-溴-4'氯苯亚甲基苯胺（BCBA）的有机非线性光学材料被合成，并通过室温下的溶剂蒸发法从丙酮溶液中生长出 BCBA 的单晶。其三维结构通过在 173 K 下的单晶 X 射线衍射分析得以阐明。对合成的 BCBA 化合物进行了傅里叶变换红外（FTIR）和（1）H 和（13）C 核磁共振光谱分析。通过紫外-可见-近红外光谱确定了 BCBA 的透光范围和百分比，并使用荧光光谱仪记录了其荧光光谱。通过在（001）平面上进行维氏显微硬度试验来评估晶体的机械强度。测量了沿（001）平面的不同频率下生长晶体的介电常数。通过使用波长为 632.8nm 的氦氖激光辐射的 Z 扫描技术研究了 BCBA 的三阶非线性光学性质，并计算了相应的非线性折射率、吸收系数和光敏感性。
