Centre for Crystal Growth, SAS, VIT University, Vellore 632 014, Tamil Nadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Dec;116:143-7. doi: 10.1016/j.saa.2013.07.021. Epub 2013 Jul 24.
Organic nonlinear optical (NLO) crystal 2-chloro-N-[4-(dimethylamino)benzylidene]aniline (2Cl4DBA) was synthesized and grown by restricted slow evaporation technique at room temperature using acetone as solvent with good degree of transparency. The lattice parameters were determined and found to be noncentrosymmetric orthorhombic system by single crystal X-ray diffraction. The crystalline nature of the synthesized material was recorded by the powder X-ray diffraction pattern. Molecular structure of the grown crystal was investigated by (1)H and (13)C NMR and functional groups were identified by FTIR spectrum analysis. The optical absorbance of the grown crystal was ascertained by recording UV-Visible spectrum. Thermal and physiochemical stability of the grown material was investigated by TG/DTA analysis. SHG efficiency was determined by Kurtz-Perry Powder SHG technique and found to be 4.2 and 1.54 times greater that of standard KDP and urea crystals respectively.
有机非线性光学 (NLO) 晶体 2-氯-N-[4-(二甲基氨基)苯亚甲基]苯胺 (2Cl4DBA) 是通过室温下的限制缓慢蒸发技术，使用丙酮作为溶剂合成和生长的，具有很好的透明度。通过单晶 X 射线衍射确定了晶格参数，并发现其为非中心对称的正交晶系。通过粉末 X 射线衍射图谱记录了合成材料的晶体性质。通过 (1)H 和 (13)C NMR 研究了生长晶体的分子结构，并通过 FTIR 光谱分析确定了官能团。通过记录紫外-可见光谱确定了生长晶体的光吸收。通过 TG/DTA 分析研究了生长材料的热稳定性和物理化学稳定性。通过 Kurtz-Perry 粉末倍频 SHG 技术确定了 SHG 效率，发现其分别比标准 KDP 和尿素晶体大 4.2 倍和 1.54 倍。
