Bolaamphiphiles bearing bipyridine as mesogenic core: Rational exploitation of molecular architectures for controlled self-assembly

Guanglu Wu, Peter Verwilst, Jun Xu, Huaping Xu, Ruji Wang, Mario Smet, Wim Dehaen, Charl F J Faul, Zhiqiang Wang, Xi Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

24 Citations (Scopus)

Abstract

A bolaamphiphile (5,5-B2NBr8) bearing a functional bipyridine moiety as the mesogenic core is reported for the first time. 5,5-B2NBr8 was found to self-assemble into uniform fibrous structure in aqueous solution, when the concentration was higher than cmc. Analogues of 5,5-B2NBr8 with structural differences in chain length, headgroup, mesogenic core, and substituted position were synthesized, elucidating that small variances of the molecular structure could lead to dramatic changes of the resulting assemblies. For example, compound 4,4-B2NBr8 showed only spherical colloidal aggregates rather than fibers as 5,5-B2NBr8 did, while the only difference between them was the position at which the alkyl chains were attached onto bipyridine. A probable model for the fibrous structure of 5,5-B2NBr8 was proposed. Moreover, exploiting the coordination capacity of bipyridine, assembly and disassembly of 5,5-B2NBr8 could be reversibly controlled through the addition of EDTA and Cu(II), respectively.

Original languageEnglish
Pages (from-to)5023-5030
Number of pages8
JournalLangmuir
Volume28
Issue number11
DOIs
Publication statusPublished - 20 Mar 2012

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