溶液法五氯硝基苯单晶生长的研究
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摘要
测定PCNB在丙酮溶剂中的溶解度,采用恒温溶剂蒸发法首次在丙酮中成功生长出PCNB单晶。结果显示:302K以下温区具有较小的温度系数,适用于恒温蒸发法生长单晶;生长出了厘米尺寸的PCNB晶体;红外和拉曼光谱的测量结果说明所生长的晶体中未包裹溶剂;X射线衍射分析表明,所生长出晶体结构为六方晶系,单晶质量较好。
Solubility of PCNB was determined in acetone solvent. The PCNB single crystals were successfully grown by constant temperature solvent evaporation method in acetone for the first time. The results show that:there is a smaller temperature coefficient zone below 302 K,which is suitable for the growth of single crystals by constant temperature evaporation method; the PCNB single crystals with centimeter size were obtained; the IR and Raman spectra show that the crystals have not incorporated solvent; XRD analysis indicates that the lattice structure of PCNB crystals is hexagonal and have good quality.
Solubility of PCNB was determined in acetone solvent. The PCNB single crystals were successfully grown by constant temperature solvent evaporation method in acetone for the first time. The results show that:there is a smaller temperature coefficient zone below 302 K,which is suitable for the growth of single crystals by constant temperature evaporation method; the PCNB single crystals with centimeter size were obtained; the IR and Raman spectra show that the crystals have not incorporated solvent; XRD analysis indicates that the lattice structure of PCNB crystals is hexagonal and have good quality.
引文
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[3]Brand R,Lunkenheimer P,Loidl A.Relaxation Dynamics in Plastic Crystals[J].Journal of Chemical Physics,2002,116(23):10386-10401.
[4]Michl M,Bauer Th,Lunkenheimer P.Cooperativity and Heterogeneity in Plastic Crystals Studied by Nonlinear Dielectric Spectroscopy[J].Physical Review Letters,2015,114(6):067601.
[5]Shahin M,Murthy S S N.Glass Transition Phenomena in the Crystalline Phase of Hexa-substituted Benzenes[J].Journal of Chemical Physics,2003,118(118):7495-7503.
[6]Pardo L C,Lunkenheimer P,Loidl A.Alpha and Beta Relaxation Dynamics of a Fragile Plastic Crystal[J].Journal of Chemical Physics,2006,124(12):124911-124911-7.
[7]Martínez-García J C,Tamarit J L,Rzoska S J.Universal Critical-like Scaling of Dynamics in Plastic Crystals[J].Journal of Non-Crystalline Solids,2011,357(2):329-333.
[8]Elpidio T,Johari G P.Structural Fluctuations and Orientational Glass of Levoglucosan-high Stability Against Ordering and Absence of Structural Glass[J].Journal of Chemical Physics,2015,142(10):139.
[9]Singh L P,Murthy S S N.Dielectric and Calorimetric Investigation of an Unusual Two-component Plastic Crystal:Cyclohexanol-neopentylglycol[J].Physical Chemistry Chemical Physics,2009,11(25):5110-5118.
[10]戎谊.五氯硝基苯(PCNB)[J].世界农药,1985,(5):53-54.
[11]Zhang W,Huang J,Xu F,et al.Mechanochemical Destruction of Pentachloronitrobenzene with Reactive Iron Powder.[J].Journal of Hazardous Materials,2011,198(2):275-281.
[12]Liu J,Fei X,Yu X,et al.Highly Enhanced f-f Transitions of Eu3+in La2O3Phosphor via Citric Acid and Poly(Ethylene Glycol)Precursor Route[J].Journal of Non-Crystalline Solids,2007,353(52-54):4697-4701.
[13]翁诗甫.傅里叶变换红外光谱分析[M].北京:化学工业出版社,2010:304.