Krishna Kumar V, Nagalakshmi R
Department of Physics, Periyar University, Salem 636011, Tamil Nadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Apr;66(4-5):924-34. doi: 10.1016/j.saa.2006.03.042. Epub 2006 May 12.
8-hydroxyquinolinium picrate (8-HQP) was synthesized by the addition of equimolar quantities of 8-hydroxyquinoline (8-HQ) and picric acid (PA). Single crystals were grown from N,N dimethyl formamide (DMF) by restricted evaporation method at room temperature. The solubility of 8-HQP was determined in different solvents at various temperatures. The structural characterization of the grown crystals was carried out by X-ray diffraction. Vibrational modes were classified on the basis of group theoretical analysis and the spectral bands were compared with those of parent compounds in order to propose a tentative assignment by recording FT-IR, FT-Raman and polarized Raman spectra in different crystal orientations. The crystal possess lower cut-off at 230 nm and good transparency as confirmed by optical transmittance studies.
通过加入等摩尔量的8-羟基喹啉（8-HQ）和苦味酸（PA）合成了苦味酸8-羟基喹啉鎓（8-HQP）。在室温下采用受限蒸发法从N，N-二甲基甲酰胺（DMF）中生长出单晶。测定了8-HQP在不同温度下在不同溶剂中的溶解度。通过X射线衍射对生长的晶体进行结构表征。基于群理论分析对振动模式进行分类，并将光谱带与母体化合物的光谱带进行比较，以便通过记录不同晶体取向的傅里叶变换红外光谱（FT-IR）、傅里叶变换拉曼光谱和偏振拉曼光谱来进行初步归属。通过光学透射率研究证实，该晶体在230nm处具有较低的截止值和良好的透明度。
