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Title: Water Dynamics in Gyroid Phases of Self-Assembled Gemini Surfactants

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.5b12370· OSTI ID:1341619

Water-mediated ion transport through functional nanoporous materials depends on the dynamics of water confined within a given nanostructured morphology. In this study, we investigate hydrogen-bonding dynamics of interfacial water within a ‘normal’ (Type I) lyotropic gyroid phase formed by a gemini dicarboxylate surfactant self-assembly using a combina- tion of 2DIR spectroscopy and molecular dynamics simulations. Experiments and simulations demonstrate that water dynamics in the normal gyroid phase is one order of magnitude slower than that in bulk water, due to specific interactions between water, the ionic surfactant headgroups, and counterions. However, the dynamics of water in the normal gyroid phase are faster than those of water confined in a reverse spherical micelle of a sulfonate surfactant, given that the water pool in the reverse micelle and the water pore in the gyroid phase have roughly the same diameters. This difference in confined water dynamics likely arises from the significantly reduced curvature- induced frustration at the convex interfaces of the normal gyroid, as compared to the concave interfaces of a reverse spherical micelle. These detailed insights into confined water dynamics may guide the future design of artificial membranes that rapidly transport protons and other ions.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0010328; FG02-09ER16110; CHE-0840494
OSTI ID:
1341619
Report Number(s):
DOE-UWMadison-46938-1st product; FG02-13ER46938
Journal Information:
Journal of the American Chemical Society, Vol. 138, Issue 8; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (10)

Ice-like water supports hydration forces and eases sliding friction journal August 2016
On the origin of the extremely different solubilities of polyethers in water text January 2019
Nanoreactors for Chemical Synthesis and Biomedical Applications journal August 2019
Multi‐Responsive Supramolecular Hydrogels Derived from Gemini Surfactants for Visual Recognition of Isomerization journal June 2019
Micelle-enhanced flow injection analysis journal April 2018
Solvent-dependent structural dynamics of an azido-platinum complex revealed by linear and nonlinear infrared spectroscopy journal January 2018
Micellar and bicontinuous microemulsion structures show different solute–solvent interactions: a case study using ultrafast nonlinear infrared spectroscopy journal January 2018
On the origin of the extremely different solubilities of polyethers in water journal June 2019
Extraordinary Slowing of Structural Dynamics in Thin Films of a Room Temperature Ionic Liquid journal July 2018
Probing the Microenvironments in a Polymer-Wrapped Core–Shell Nanoassembly Using Pyrene Chromophores journal July 2018

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