葫芦脲[8]与一种萘型表面活性剂的包络作用的光谱学研究  

Spectroscopy Study of the Interaction between Cucurbit[8] Uril and a Naphthalene Surfactant

作　　者：杨震宇[1] 高春枝[1] 齐海霞[1] 刘苗[1] 黄香丽[1] 

机构地区：[1]南昌大学化学系,江西南昌330031

出　　处：《南昌大学学报（工科版）》2011年第2期122-128,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(20703023;20963007);江西省教育厅基金资助项目(GJJ10290)

摘　　要：合成一种新颖的阳离子萘型表面活性剂4-(1-萘氧基-5-辛氧基)丁基三甲基溴化铵(TNBAB),利用紫外、荧光、1HNMR及红外多种谱学方法研究了水溶液中葫芦脲[8](CB[8])对TNBAB包络作用。研究表明:在一定的物质的量浓度范围内,体系的荧光强度和紫外吸收强度均随CB[8]浓度的增大而减弱,直到二者比例为1:1时,不再随着CB[8]浓度的增大而发生明显变化,表明二者形成了1:1的包络物;得到包络计量比,并计算包络物稳定常数,得到的较大稳定常数(5.2×105L.mol-1,1.2×105L.mol-1)表明形成的包络物相当稳定。红外吸收峰不同程度的蓝移证实了稳定的包络物的存在。在此基础上,结合CB[8]及表面活性剂分子的结构特征,利用1HNMR对其包络机理及主客体作用模式进行了探讨。A novel cationic surfactant of N,N,N-trimethyl-4-（5-（octyloxy） naphthalene-1-yloxy） butan-1-aminium bromide（TNBAB） was synthesized,the interaction between TNBAB and cucurbit[8]uril（CB[8]） in water at room temperature was investigated by UV,fluorescence,1H NMR and IR.At a certain concentration range,it was showed that the fluorescence intensity and UV absorption intensity were decreased with the different concentration of CB[8],the intensity gradually converged to a constant value until the stoichiometry is close to 1：1,which indicated that the complex formation between CB[8] and TNBAB with 1：1 stoichiometry.The stability constants were calculated by Benesi-Hildebrand,and the value were 1.2×105 L·mol-1and 5.2×105 L·mol-1.The obtained larger stability constant showed that the complex was very stable.In IR spectra,the absorption peak of the complex compared with TNBAB shifted to higher wave number,confirming the formation of the complex.1H NMR spectrum further proved the 1：1 formation of inclusion compound,and discussed the formation mode of the complex.

关 键 词：4-(1-萘氧基-5-辛氧基)丁基三甲基溴化铵 葫芦脲[8] 包络物 稳定常数 

分 类 号：O657.3[理学—分析化学] O657.61[理学—化学]