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- W2891924330 abstract "Phytantriol is an interfacially-active lipid that is chemically robust, non-digestible and forms particles with internal bicontinuous cubic phase structures (cubosomes) when dispersed with non-ionic surfactants at ambient and physiological temperatures. The liquid crystalline internal structure of phytantriol-based cubosomes can be changed to alter the interfacial contact area/topology with the aqueous dispersant to trigger bioactive payload release or to alter the local membrane curvature around bound or embedded proteins. To enable the study of payload distribution, structure and transformation kinetics within phytantriol particles by neutron scattering techniques it is desirable to have access to a deuterated version of this molecule but to date a synthetic route has not been available. The first successful synthesis of phytantriol-d39 is presented here alongside a preliminary physical characterisation of related particle structures when phytantriol-d39 is dispersed using two non-ionic surfactants, Tween® 80 and Pluronic® F127. Synchrotron small angle X-ray scattering (SAXS) was used to confirm that phytantriol-d39-based nanoparticles in D2O form similar liquid crystalline structures to those of their natural isotopic abundance (phytantriol/H2O) counterparts as a function of temperature. Finally, small angle neutron scattering (SANS) with solvent contrast to match out the phytantriol-d39 structuring was used to show that the spatial correlations between the Tween® and Pluronic® non-ionic surfactant molecules are different within dispersed phytantriol-d39 particles with different liquid crystalline structures in D2O. The surfactant molecules in phytantriol-d39/Tween® 80 particles with Im3m cubic structures were found to follow a self-avoiding walk, whereas in phytantriol-d39/Pluronic® F127 particles with Pn3m cubic structures they were found to follow a more rod-like packing arrangement." @default.
- W2891924330 created "2018-09-27" @default.
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- W2891924330 date "2019-01-01" @default.
- W2891924330 modified "2023-10-08" @default.
- W2891924330 title "Deuterated phytantriol – A versatile compound for probing material distribution in liquid crystalline lipid phases using neutron scattering" @default.
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- W2891924330 doi "https://doi.org/10.1016/j.jcis.2018.09.022" @default.
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