%0 Journal Article
%T NMR Investigation of Quaternary Ammonium Dimeric Surfactant C16-4-C16·2Br Micelles<br>季铵盐型双子表面活性剂16-4-16聚集状态的NMR研究
%A LIU Ai-hong
%A CHEN Hong
%A Cheng Gong-zhen
%A FANG Xiao-wen
%A YANG Xiao-yan
%A MAO Shi-zhen
%A YUAN Han-zhen
%A LUO Ping-ya
%A DU You-ru
%A <br>刘爱红
%A 陈洪
%A 程功臻
%A 方小雯
%A 杨晓焱
%A 毛诗珍
%A 袁汉珍
%A 罗平亚
%A 杜有如
%J 波谱学杂志
%D 2005
%I 
%X Conformation of Gemini 16-4-16 in heavy water solutions at concentrations close to the critical micellar concentration (cmc) was studied by NMR relaxation, self-diffusion and two-dimensional nuclear Overhauser enhancement spectroscopy (2D NOESY). In forming micelles, the protons of the spacer group and a part of hydrophobic protons next to the polar head group are involved in the surface layer of the micellar core. The hydrophobic protons away from the polar head group are situated internal in the micellar core. The motion of the molecules are relatively more restricted than their monomeric homologue CTAB. 2D NOESY experiments show cross peaks between the protons in or close to the spacer group. The inter-proton distances thus calculated show deviation from those of the intra-molecular ones, calculated by HYPERCHEM. Therefore, inter-molecular interaction is responsible for these strong cross peaks. The corresponding proton pairs are in near vicinity. Accordingly we postulate a special arrangement of the molecules in the spherical 16-4-16 micelles.
%K 2D NOESY
%K NMR
%K Gemini
%K relaxation
%K 2D NOESY
%K micelle<br>核磁共振
%K 双子表面活性剂
%K 弛豫
%K 胶束
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=1A3C8C6E452BD1AF5A6B6B99BA3989C9&aid=C3254BF00CD6DCC7&yid=2DD7160C83D0ACED&vid=BC12EA701C895178&iid=0B39A22176CE99FB&sid=AE09EACBCD1B2A13&eid=6DE26652A1045643&journal_id=1000-4556&journal_name=波谱学杂志&referenced_num=0&reference_num=16