期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Tween40/Gemini体系中spacer长度对复配体系效能影响的核磁共振研究
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1. 河北师范大学 化学与材料科学学院, 河北 石家庄 050024;
2. 河北师范大学 分析测试中心, 河北 石家庄 050024 -
DOI：10.13763/j.cnki.jhebnu.nse.2016.01.009
NMR Study of the Effect of Spacer Length in Tween 40/Gemini System on a Mixed System Effectiveness
摘要/Abstract
聚氧乙烯山梨醇酐单棕榈酸酯Tween 40(T40)是一种常见的非离子表面活性剂,利用核磁共振技术的化学位移的变化、自旋-自旋弛豫时间和自旋-晶格弛豫时间、自扩散系数以及二维NOESY谱,研究了T40与双子表面活性剂(Gemini)四亚甲基-1, 4-双(十二烷基氯化铵)、八亚甲基-1, 8-双(十二烷基氯化铵)二元复配体系混合胶束的形成、大小变化、排列方式、复配比例、相互作用点以及T40/Gemini体系中联接基团(spacer)长度对复配体系效能的影响等.实验表明:T40/Gemini复配体系中,协同效应最佳摩尔比均为2.5:1,且随着联接基团的增加,分子间的相互作用力有所下降.
Polyoxyethylene sorbitan palmitate(T40),as a common non-ionic surfactant,is involved in the formation of binary mixed micelle system with Gemini surfactant tetramethylene 1,4-bis(dodecyl ammonium chloride) (G12-4-12) and eight methylene 1,8-bis(dodecyl ammonium chloride) (G12-8-12).The formation,size changes, arrangement,distribution proportion,interactian sites and the effect of spacer length in the system are comprehensively investigated by using the means of chemical shift (δ) change,spin-spin relaxation time (T2),spin-lattice relaxation time (T1), self-diffusion coefficient (DOSY) and two-dimensional nuclear overhauser enhancement spectroscopy(2D NOESY).The study shows that the optimal molar ratio of T40/Gemini is 2.5:1 and the intermolecular force decreases slightly with the increase of spacer group.
关键词
参考文献 14
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