摘要
以甲基-β-环糊精（MCD）与芘（Pyr）为原料，通过饱和溶液法制得甲基-β-环糊精与芘的包合物（INC）。利用紫外光谱（uv）、红外光谱（IR）、热重-差热分析（TG-DSC）、扫描电镜（SEM）及X射线粉末衍射（XRD）等对其结构与性能进行了表征与测试。对不同温度下INC的紫外光谱和红外光谱进行了考察。结果表明：当制备温度为25℃时，INC包合率最高，为39％，在240nin处对应吸光度最大，为1．62a．u．；IR检测到受包合物形成的影响，包合物INC中芘的特征峰强度变低、峰形变宽或发生位移；TG-DSC表明，芘占据甲基β环糊精的空腔生成了包合物；SEM、XRD显示，包合物出现一组新的特征衍射峰，2θ=11．73°、18．04°、20．56°，表明包合物晶型改变；甲基毋环糊精与芘可形成稳定的包合物，当温度为25℃时，甲基-β-环糊精使芘在水中的质量浓度增加到7．36mg／L，为15℃时的2倍。
Inclusion complex （INC） of methyl-β-cyclodextrin （MCD） with pyrene （Pyr） was prepared by saturated solution method, and characterized by ultraviolet spectroscopy （UV）, infrared spectroscopy （IR）, thermal gravimetric analysis （TG）, differential thermal analysis （DSC）, scanning electron microscope （SEM）, X-ray diffraction （XRD） and other techniques. The results showed that the inclusion complex INC achieved the highest inclusion efficiency （39%） at 25 ℃. At 240 nm, the corresponding absorbance was the largest （1.62 a.u.）. IR results indicated that the characteristic peak intensity ofpyrene in INC decreased, the peak became wider or produced a noticeable displacement. TG-DSC results revealed that pyrene could enter into the interior of the cavity of β-cyclodextrin molecule, which promoted the formation of inclusion complex. XRD results displayed that a series of new characteristic diffraction peaks of inclusion complex appeared at 11.73°, 18.04°, 20.56° which revealed the inclusion complex polymorph was changed. It was found that a stable inclusion complex was formed between methyl-β-cyclodextrin and pyrene when the temperature was 25 ℃. In addition, methyl-β-cyclodextrin could increase the mass concentration of pyrene in water, and the mass concentration of ovrene was 7.36 mg/L. two times that of 15 ℃.
作者
杨凤
丁克强
刘廷凤
郭光
张雯娣
李康
YANG Feng;DING Ke-qlang;LIU Ting-feng;GUO Guang;ZHANG Wen-di;LI Kang(School of Environmental Engineering,Nanjing Institute of Technology,Nanjing 211167,Jiangsu,China;College of Environmental and Safety Engineering,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2018年第9期1589-1593,1608,共6页
Fine Chemicals
基金
国家自然科学基金(41271329)
南京工程学院人才引进计划(YKJ201328)~~
关键词
芘
甲基-β-环糊精
包合物
水处理技术与环境保护
pyrene
methyl-β-cyclodextrin
inclusion complex
water treatment technology andenvironmental protection
