Reversible light-induced critical separation

Tabor, Richard Francis; Oakley, Richard; Eastoe, Julian; Faul, Charl F. J.; Grillo, Isabelle; Heenan, Richard K.

doi:10.1039/b813234h

Cited by 48 publications

(41 citation statements)

References 22 publications

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“…The azobenzene group of AzoC6Mim can realize trans-cis conformational change [49][50][51][52][53][54][55], which is confirmed by UV-vis spectrum (Fig. 1).…”

Section: Photoisomerization Of Cationic Surfactant Azoc6mimsupporting

confidence: 70%

Light and host–guest inclusion mediated salmon sperm DNA/surfactant interactions

Lin

Zhang

Qiao

et al. 2011

Journal of Colloid and Interface Science

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“…The azobenzene group of AzoC6Mim can realize trans-cis conformational change [49][50][51][52][53][54][55], which is confirmed by UV-vis spectrum (Fig. 1).…”

Section: Photoisomerization Of Cationic Surfactant Azoc6mimsupporting

confidence: 70%

Light and host–guest inclusion mediated salmon sperm DNA/surfactant interactions

Lin

Zhang

Qiao

et al. 2011

Journal of Colloid and Interface Science

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“…Materials combining magneto‐responsivity with surface activity offer tantalizing possibilities in potential applications. Traditionally,23 in order to alter properties of inert surfactant solutions such as cmc, surface tension, aggregate size and shape, or to control phase separation/recovery it has been necessary to perturb the composition, such as with electrolyte or pH, or with external thermodynamic variables (temperature and/or pressure). Disadvantages of these control methods are irreversible changes in system composition, or significant energy inputs.…”

Section: Selected Physical Properties Of Surfs 1–3 and Milss 1–3[a]mentioning

confidence: 99%

Magnetic Control over Liquid Surface Properties with Responsive Surfactants

et al. 2012

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Surfactants responsive to pH, [1] temperature, [2] CO 2 , [3] and light [4] are well known. Here we report for the first time ionic liquid surfactants that are magneto-responsive, thus offering the potential to perturb liquid emulsions simply by the application of an external magnetic field. Although ionic liquids (ILs) containing transition metal complexes have been known for some time, [5] it had always been assumed that the metallic centers were isolated, lacking long-range interactions and communication necessary to be magnetically active. [6] Only recently have ionic liquids containing magneto-active metal complex anions, such as 1-methyl-3-butylimidazolium tetrachloroferrate ([bmim]FeCl 4 ), [7] been reported. [7,8] These magnetic ionic liquids (mag-ILs) are especially interesting as they are molecular liquids, rather than typical magnetic fluids (ferrofluids) which comprise magnetic colloidal particles (! 10 nm) dispersed in a carrier fluid. The nanoparticle-free mag-ILs are themselves paramagnetic. As such they contain high effective concentrations of metal centers and allow physico-chemical properties (hydrophobicity, electrical conductivity, melting point, etc.) to be controlled by external magnetic fields. Furthermore, because mag-ILs and magnetic ionic liquid surfactants (MILSs) are non-volatile they offer advantages over conventional ferrofluids which often employ flammable organic solvents.[**] P.B. thanks HEFCE and the University of Bristol, School of Chemistry for a DTA, PhD scholarship. A.B. and A.M.S. credit funding by ERA NanoSciE + . We also achnowledge STFC for the allocation of beam time, travel, and consumables grants at ILL, and the Krüss Surface Science Centre, Bristol, for facilities for surface tension measurements.Supporting information for this article is available on the WWW under http://dx.

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“…Thus light can be used as a tool to manipulate the organized structures of surfactants and their applications. Eastoe and co-workers [17] developed an emulsion system which was photo-responsive and could be used in lithography. Vesicles formed from photo-sensitive surfactants were employed in drug delivery systems and fulfilled the purpose of targeted and controlled release by light [18].…”

Section: Introductionmentioning

confidence: 99%