Kirubavathi K, Selvaraju K, Valluvan R, Vijayan N, Kumararaman S
Department of Physics, Thanthai Hans Roever College, Perambalur 621212, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2008 Apr;69(4):1283-6. doi: 10.1016/j.saa.2007.07.042. Epub 2007 Aug 2.
Single crystals of a new semiorganic nonlinear optical (NLO) material, L-valine hydrochloride (LVHCl), having dimensions up to 20 mm x 6 mm x 4 mm have been grown by slow evaporation solution growth technique. Single crystal X-ray diffraction studies confirm that the grown crystal belongs to the monoclinic system. The functional groups presented in the crystal were confirmed by Fourier transform infrared (FTIR) technique. Optical transmission spectrum shows very low absorption in the entire visible region. Differential thermal and thermogravimetric analyses confirmed that the crystal is stable up to 211 degrees C. The powder second harmonic generation (SHG) efficiency of LVHCl is 1.7 times efficient as potassium dihydrogen phosphate (KDP).
通过缓慢蒸发溶液生长技术，已生长出尺寸达20毫米×6毫米×4毫米的新型半有机非线性光学（NLO）材料L-缬氨酸盐酸盐（LVHCl）单晶。单晶X射线衍射研究证实所生长的晶体属于单斜晶系。通过傅里叶变换红外（FTIR）技术确认了晶体中存在的官能团。光学透射光谱表明在整个可见光区域吸收非常低。差示热分析和热重分析证实该晶体在高达211摄氏度时是稳定的。LVHCl的粉末二次谐波产生（SHG）效率是磷酸二氢钾（KDP）的1.7倍。
