School of Advanced Sciences, VIT University, Vellore 632 014, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Nov;97:995-1001. doi: 10.1016/j.saa.2012.07.128. Epub 2012 Aug 8.
4-Methoxy 4-nitrostilbene (MONS), a new organic nonlinear optical material has been synthesized. Based on the solubility data good quality single crystal with dimensions up to 38×11×3 mm(3) has been grown by slow evaporation method using ethyl methyl ketone (MEK) as a solvent. Powder XRD confirms the crystalline property and also the diffraction planes have been indexed. The lattice parameters for the grown MONS crystals were determined by using single crystal X-ray diffraction analysis and it reveals that the crystal lattice system is triclinic. The crystalline perfection of the grown crystals has been analysed by high resolution X-ray diffraction (HRXRD) rocking curve measurements. Fourier transform infrared (FTIR) spectrum for powdered MONS sample confirms the functional groups present in the grown crystal. The UV-vis absorption spectrum has been recorded in the range of 190-1100 nm and the cut off wavelength 499 nm has been determined. The optical constants of MONS have been determined through UV-vis-NIR spectroscopy. The MONS crystals were further subjected to other characterizations. i.e., (1)H NMR, TG/DTA, photoluminescence and microhardness test. The Kurtz and Perry powder technique confirms the NLO property of the grown crystal and the SHG efficiency of MONS was found to be 1.55× greater than that of KDP crystal.
4-甲氧基-4-硝基二苯乙烯（MONS）是一种新的有机非线性光学材料，已经被合成出来。基于溶解度数据，我们使用甲乙酮（MEK）作为溶剂，通过缓慢蒸发的方法生长出了尺寸可达 38×11×3mm(3)的高质量单晶。粉末 XRD 确认了晶体的性质，并且还对衍射平面进行了索引。通过单晶 X 射线衍射分析确定了生长的 MONS 晶体的晶格参数，结果表明晶体晶格系统为三斜晶系。通过高分辨率 X 射线衍射（HRXRD）摇摆曲线测量分析了生长晶体的晶体完整性。粉末状 MONS 样品的傅立叶变换红外（FTIR）光谱证实了生长晶体中存在的官能团。记录了 190-1100nm 范围内的紫外-可见吸收光谱，并确定了截止波长 499nm。通过紫外-可见-近红外光谱法确定了 MONS 的光学常数。MONS 晶体还进行了其他特性的测试，例如（1）H NMR、TG/DTA、光致发光和显微硬度测试。库尔兹和佩里粉末技术证实了生长晶体的 NLO 性质，并且发现 MONS 的倍频效率比 KDP 晶体高 1.55 倍。
