%0 Journal Article
%T Phase transfer of TiO2 nanoparticles from water to ionic liquid triggered by phosphonic acid grafting
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM)
%+ Laboratoire Charles Coulomb (L2C)
%A Bhandary, R.
%A Alauzun, J. G.
%A Hesemann, Peter
%A Stocco, Antonio
%A In, Martin
%A Mutin, P. Hubert
%< avec comité de lecture
%@ 1744-683X
%J Soft Matter
%I Royal Society of Chemistry
%V 13
%N 44
%P 8023 - 8026
%8 2017
%D 2017
%R 10.1039/c7sm01424d
%Z Chemical Sciences/Material chemistryJournal articles
%X Controlling the interface between TiO2 nanocrystals and ionic liquids is of high fundamental and applied interest for energy storage and conversion devices. Phase transfer of nanoparticles from a synthesis medium to a processing or an application medium plays a significant role in nanotechnology. Here we demonstrate that surface modification with phosphonic acids bearing cationic end-groups can trigger the phase transfer of TiO2 nanoparticles from an aqueous sol to a typical water-immiscible ionic liquid, [Emim][NTf2]. The transfer involves both the grafting of the phosphonic acid moiety and the exchange of the counter ion of the cationic end-group by NTf2 anions, as demonstrated by solid-state NMR, elemental analysis and independent grafting and ion exchange experiments. Furthermore, the colloidal stability of the TiO2 sols in [Emim][NTf2] strongly depends on the hydrophobic character of the cationic end-groups.
%G English
%L hal-01653105
%U https://hal.science/hal-01653105
%~ CNRS
%~ ENSC-MONTPELLIER
%~ ICG
%~ L2C
%~ INC-CNRS
%~ MIPS
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ UM-2015-2021
%~ TEST2-HALCNRS