Designing the topology of ion nano-channels in the mesophases of amphiphilic wedge-shaped moleculesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 декабря 2015 г.
Аннотация:The wedge-shaped amphiphiles bearing sulfonate groups at the tip
of the wedge are prone to form ion nano-channels upon exposure to a
humid atmosphere. During swelling, water molecules preferentially
accumulate in polar regions of the system resulting in the formation
of a lyotropic phase. In this work, the details of the structure formation
processes occurring upon swelling in water vapour, including determination
of the size and topology of the ion nano-channels, are explored.
The electron density profiles across the channel are obtained from the
fits of the X-ray scattering data with two- and three-phase structural
models the applicability of which is critically analysed. The results show
that the ion channel size correlates not only with water uptake but
also with the molecular architecture such as the structure of the
rigid molecular fragment bearing a polar group. These findings can
help optimising the ion transport for development of ion-selective
membranes.