Centre for Crystal Growth, School of Advanced Sciences, VIT University, Vellore 632 014, Tamil Nadu, India.
Centre for Crystal Growth, School of Advanced Sciences, VIT University, Vellore 632 014, Tamil Nadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 May 5;125:335-44. doi: 10.1016/j.saa.2014.01.109. Epub 2014 Feb 5.
Optically transparent crystal of the organic salt DEASI (2-[2-(4-Diethylamino-phenyl)-vinyl]-1-methyl-pyridinium iodide) has been synthesized by using knoevenagel condensation reaction method. The synthesized material has been purified by successfully recrystallization process. Single crystals of DEASI have been grown by slow evaporation technique at room temperature. The solubility of the title material has been determined at different temperature in acetonitrile/methanol mixture. The cell parameters and crystallinity of the title crystal were determined by single crystal XRD. The powder diffraction was carried out to study the reflection plane of the grown crystal and diffraction peaks were indexed. The presence of different functional groups in the crystal was confirmed by Fourier transform infrared (FTIR) analysis. (1)H NMR spectrum was recorded to confirm the presence of hydrogen nuclei in the synthesized material. The optical property of the title crystal was studied by UV-Vis-NIR spectroscopic analysis. The melting point and thermal property of DEASI were studied using TGA/DSC technique. The Vicker's hardness (Hv) was carried out to know the category. The dielectric constant and dielectric loss of the compound decreases with an increase in frequencies. Chemical etching studies showed that the DEASI grows in the two dimensional growth mechanisms. The Kurtz-Perry powder second harmonic generation (SHG) test has done for title crystal.
通过 Knoevenagel 缩合反应方法合成了有机盐 DEASI（2-[2-（4-二乙氨基苯基）-乙烯基]-1-甲基吡啶𬭩碘化物）的透明晶体。通过成功的重结晶过程对合成材料进行了纯化。通过室温下的缓慢蒸发技术生长了 DEASI 的单晶。在乙腈/甲醇混合物中不同温度下测定了标题材料的溶解度。通过单晶 XRD 确定了标题晶体的晶胞参数和结晶度。进行粉末衍射以研究生长晶体的反射面，并对衍射峰进行了指标化。通过傅立叶变换红外（FTIR）分析确认了晶体中存在不同的官能团。记录了（1）H NMR 谱以确认合成材料中氢核的存在。通过紫外-可见-近红外光谱分析研究了标题晶体的光学性质。使用 TGA/DSC 技术研究了 DEASI 的熔点和热性能。通过维氏硬度（Hv）测试来确定类别。化合物的介电常数和介电损耗随频率的增加而降低。化学腐蚀研究表明，DEASI 以二维生长机制生长。对标题晶体进行了 Kurtz-Perry 粉末二次谐波产生（SHG）测试。
