笼状胺基金属表面活性剂形成的蠕虫状胶束

Wormlike micelles from a cage amine metallosurfactant.

作者信息

Koutsantonis George A, Nealon Gareth L, Buckley Craig E, Paskevicius Mark, Douce Laurent, Harrowfield Jack M, McDowall Alasdair W

机构信息

Chemistry, School of Biomedical, Biomolecular and Chemical Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA, Australia 6009.

出版信息

Langmuir. 2007 Nov 20;23(24):11986-90. doi: 10.1021/la701283b. Epub 2007 Oct 19.

DOI:10.1021/la701283b

PMID:17949016

Abstract

We have shown that copper and cobalt metallosurfactants derived from Cu(II) and Co(III) complexes of a macrobicyclic hexamine ("cage") can form wormlike micelles in aqueous solution that may coexist with or easily interconvert with vesicle structures. The cylindrical micelle structures are unusual for triple-chain surfactants with a single headgroup and are not easily accounted for using geometrical packing arguments. The solution behavior has been characterized by cryo-TEM and SAXS measurements. Both the Cu and Co compounds display viscoelastic solutions at 1 wt %, indicating that such behavior may be anticipated for the full variety of stable metal complexes formed by the cage headgroup, auguring applications based on the incorporation of metallo aggregates into mesoporous silica structures.

摘要

我们已经表明，由大环六胺（“笼”）的Cu（II）和Co（III）配合物衍生的铜和钴金属表面活性剂在水溶液中可以形成蠕虫状胶束，其可能与囊泡结构共存或容易相互转化。对于具有单个头基的三链表面活性剂来说，圆柱形胶束结构并不常见，并且使用几何堆积理论很难解释。通过冷冻透射电子显微镜（cryo-TEM）和小角X射线散射（SAXS）测量对溶液行为进行了表征。Cu和Co化合物在1 wt%时均表现出粘弹性溶液，这表明由笼状头基形成的各种稳定金属配合物可能都有这种行为，预示着基于将金属聚集体掺入介孔二氧化硅结构的应用前景。