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Papers by Jean-daniel Marty

HAL (Le Centre pour la Communication Scientifique Directe), 2005

Langmuir monolayers of an amphiphilic ketone 1 have been studied on pure water and on aqueous sub... more Langmuir monolayers of an amphiphilic ketone 1 have been studied on pure water and on aqueous subphases containing sodium borohydride. Changes in the compression isotherm and in the monolayer morphology were observed when the concentration of NaBH4 or the delay between spreading and compression was increased. These modifications were specific to NaBH4 and suggested that a chemical reaction is taking place along the monolayer. Modifications in the IR spectrum of the corresponding Langmuir-Blodgett film confirmed the reduction of the ketone group of 1 when spread on aqueous subphases of sodium borohydride. Analysis of the compression isotherms demonstrated that this reaction occurred for all surface pressures and therefore indicated that the ketone group of 1 is accessible to the borohydride whatever the compression state of the monolayer.

Molecular Crystals and Liquid Crystals, 2004

ABSTRACT A novel approach to the synthesis of molecularly imprinted polymers via covalent or non-... more ABSTRACT A novel approach to the synthesis of molecularly imprinted polymers via covalent or non-covalent linkages was studied. It relies on the use of thermotropic side-chain liquid-crystal polymer networks. The polysiloxane networks obtained after extraction of the template preserved the mesomorphic organisation set up in the presence of the guest molecule. Batch rebinding analysis were performed: this study revealed that the imprinted polymer has a much greater affinity for the template molecule than the unimprinted one, and a significant selectivity.

HAL (Le Centre pour la Communication Scientifique Directe), Nov 13, 2006

HAL (Le Centre pour la Communication Scientifique Directe), Aug 28, 2006

Macromolecules, Nov 13, 1999

ABSTRACT Side chain liquid crystal polymers, with mesogenic units fixed laterally to a polymer ba... more ABSTRACT Side chain liquid crystal polymers, with mesogenic units fixed laterally to a polymer backbone were studied. The imprinted materials remained mesomorphous even with high amounts of template. The liquid crystalline character increased and avoided high cross-linking densities. Molecular imprinting was a valuable polymerization method for preparing synthetic materials able to exhibit the molecular recognition phenomenon.

HAL (Le Centre pour la Communication Scientifique Directe), 2006

Springer eBooks, 2015

ABSTRACT This book introduces various applications of liquid crystalline polymers as the emerging... more ABSTRACT This book introduces various applications of liquid crystalline polymers as the emerging new class of high performance novel materials. The authors detail the advantageous properties of these LCs including optical anisotropic, transparency and easy control over structure. This interdisciplinary work includes valuable input from international projects with special focus on the use of liquid crystalline polymers and/or nanocomposites.

Journal of Physical Chemistry A, Nov 1, 2006

A hydrogen-bonded complex between an aromatic acid and an enantiopure chiral amine has been disso... more A hydrogen-bonded complex between an aromatic acid and an enantiopure chiral amine has been dissolved in a nematic solvent, giving rise to a cholesteric medium. Fourier transform infrared (FT-IR) experiments have been performed at various temperatures on both sides of the cholesteric-isotropic transition. Liquid crystalline order provides significant enhancement to the strength of interaction, inducing a discontinuous jump in concentration of the complex at the cholesteric-isotropic transition.

European Physical Journal E, Aug 1, 2005

A cholesteric imprinted elastomer was obtained by cross-linking a nematic side-chain polysiloxane... more A cholesteric imprinted elastomer was obtained by cross-linking a nematic side-chain polysiloxane around a chiral template. The template was first linked to some functionalised groups of the polymer via hydrogen-bound interactions, then was removed by washing. The sample was macroscopically oriented during the synthesis; so, both a molecular chirality and a supramolecular phase chirality were topologically imprinted inside the network. Batch rebinding experiments, performed in the presence of the template or of the other enantiomer, showed that the imprinted polymer has a pronounced stereo-selectivity towards the template enantiomer. The rebinding capacity appeared to be greater than an unimprinted mesogenic network as well as than an imprinted non mesogenic one.

Chemistry of Materials, Sep 28, 2005

HAL (Le Centre pour la Communication Scientifique Directe), May 7, 2006

Polymer Chemistry, 2015

RAFT/MADIX statistical copolymerization of N-vinyl lactams enables to tune thermoresponsiveness a... more RAFT/MADIX statistical copolymerization of N-vinyl lactams enables to tune thermoresponsiveness and rheological properties of copolymers in aqueous solutions.

ACS Macro Letters, Jan 12, 2012

We herein report the synthesis of original vinylidene fluoride (VDF)-based amphiphilic block copo... more We herein report the synthesis of original vinylidene fluoride (VDF)-based amphiphilic block copolymers by RAFT/MADIX polymerization. The controlled polymerization of VDF could be successfully mediated by a xanthate chain transfer agent as evidenced by size exclusion chromatography (SEC), 19 F NMR, and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis. Copolymers of VDF and perfluoro(methyl vinyl ether) (PMVE) of varying controlled chain lengths were also obtained. Finally, the direct synthesis of main-chain fluorinated amphiphilic block copolymers was performed from hydrophilic poly(N,N-dimethylacrylamide) macro-RAFT agents. It is expected that this finding will open interesting perspectives for the development of new class of polymeric surfactants for the stabilization of emulsions based on water and supercritical carbon dioxide media.

HAL (Le Centre pour la Communication Scientifique Directe), 2003

The conformation of side-chain liquid crystal polymers with different mesogen-graft amounts has b... more The conformation of side-chain liquid crystal polymers with different mesogen-graft amounts has been studied by small-angle neutron scattering in dilute solutions of toluene-d8 and THF-d8. It is shown that the radius of gyration increases by about twofold when the mesogengraft amount increases from 0 to 100%, which suggests that the persistence length of the backbone increases by about 4-fold. Comparison with the results reported in the literature on the melt state suggests that the persistence length is not an intrinsic property of side chain liquid crystal polymers, but depends on inter-chain interactions.

Journal of Materials Chemistry, 2008

OATAO is an open access repository that collects the work of Toulouse researchers and makes it fr... more OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.

Journal of Supercritical Fluids, Oct 1, 2019

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Distributed under a Creative Commons Attribution-NonCommercial| 4.0 International License

Angewandte Chemie, Nov 19, 2004

Chemical Communications, 2018