Ludovic JULLIEN

@inproceedings{Blanchard-Desce:2002,
title = {Hyperpolar multichromophoric nanoassembly for molecular nonlinear optics},
author = {M Blanchard-Desce and M Ait Amer Meziane and E D Reka\"{i} and J -B Baudin and L Jullien and I Ledoux and J Zyss},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0038754955&doi=10.1117%2f12.452066&partnerID=40&md5=2ab898884653fe6f8f9fc785379b4d94},
doi = {10.1117/12.452066},
year = {2002},
date = {2002-01-01},
booktitle = {Proceedings of SPIE - The International Society for Optical Engineering},
volume = {4798},
pages = {163--172},
abstract = {A multichromophoric nanoassembly was designed by gathering seven push-pull chromophores on a β - cyclodextrin assembling unit via covalent linkers. Such supermolecule provides a valuable model for the investigation of confinement effects on the linear and nonlinear optical properties of push-pull chromophores in the condensed phase. Push-pull chromophores display a significant ground-state dipole, thus promoting dipolar interactions that are expected to influence both the conformation and the optical properties of the multichromophoric assembly. In this perspective, the photophysical and nonlinear optical properties of the mutichromophoric bundle were investigated and compared to those of the monomeric chromophore. The absorption, circular dichroism and fluorescence investigations provide evidence that the push-pull chromophores do not behave as isolated independent chromophores within the multichromophoric assembly. The nanoscale supermolecule is hypsochromically and significantly hypochromically shifted with respect to its monomeric analogue. In addition, the close proximity promotes excitonic coupling, as well as excimer formation phenomena. The nanoscopic assembly also shows a very large dipolar moment (μ = 38 D), and a significant molecular first-order hyperpolarizability, which reveal a spontaneous sheaf-type self-arrangement of the dipolar chromophores within the supermolecule. Such chiral hyperpolar nanoassemblies are promising candidates as model systems for nanophotonics.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}

@article{Bernard:2002,
title = {Raspberry vesicles},
author = {A -L Bernard and M -A Guedeau-Boudeville and L Jullien and J -M Di Meglio},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037164714&doi=10.1016%2fS0005-2736%2802%2900617-X&partnerID=40&md5=56de717378c694caa9099d109ffa604a},
doi = {10.1016/S0005-2736(02)00617-X},
year = {2002},
date = {2002-01-01},
journal = {Biochimica et Biophysica Acta - Biomembranes},
volume = {1567},
number = {SUPPL.},
pages = {1--5},
abstract = {We present a method to control the osmotic stress of giant unilamellar vesicles (GUV) and we report an original shrinkage mode of the vesicles: the volume reduction is accompanied by the formation of inverted daughter vesicles which gives the shrunk vesicles the appearance of raspberries. We analyze this peculiar shrinkage and we propose some physical origins for the observed phenomena. © 2002 Elsevier Science B.V. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Mangeney:2002,
title = {Synthesis and properties of water-soluble gold colloids covalently derivatized with neutral polymer monolayers},
author = {C Mangeney and F Ferrage and I Aujard and V Artzner and L Jullien and O Ouari and E Djouhar R\'{e}kai and A Laschewsky and I Vikholm and J W Sadowski},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037157185&doi=10.1021%2fja010796h&partnerID=40&md5=0866a4217a986ce8c43d1a84df5645a0},
doi = {10.1021/ja010796h},
year = {2002},
date = {2002-01-01},
journal = {Journal of the American Chemical Society},
volume = {124},
number = {20},
pages = {5811--5821},
abstract = {Citrate-capped gold nanoparticles as well as planar gold surfaces can be efficiently grafted with a covalently attached polymer monolayer a few nanometers thick, by simple contact of the metal surface with dilute aqueous solutions of hydrophilic polymers that are end-capped with disulfide moieties, as shown by UV/vis absorption, dynamic light scattering, and surface plasmon resonance studies. The hydrophilic polymer-coated gold colloids can be freeze-dried and stored as powders that can be subsequently dissolved to yield stable aqueous dispersions, even at very large concentrations. They allow for applying filtrations, gel permeation chromatography, or centrifugation. They do not suffer from undesirable nonspecific adsorption of proteins while allowing the diffusion of small species within the hydrogel surface coating. In addition, specific properties of the original hydrophilic polymers are retained such as a lower critical solution temperature. The latter feature could be useful to enhance optical responses of functionalized gold surfaces toward interaction with various substrates.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Rekai:2001,
title = {A hyperpolar, multichromophoric cyclodextrin derivative: Synthesis, and linear and nonlinear optical properties},
author = {E D Reka\"{i} and J -B Baudin and L Jullien and I Ledoux and J Zyss and M Blanchard-Desce},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035887434&doi=10.1002%2f1521-3765%2820011015%297%3a20%3c4395%3a%3aAID-CHEM4395%3e3.0.CO%3b2-W&partnerID=40&md5=a7139d4eee973c3a274eacb7e3bc5041},
doi = {10.1002/1521-3765(20011015)7:20<4395::AID-CHEM4395>3.0.CO;2-W},
year = {2001},
date = {2001-01-01},
journal = {Chemistry - A European Journal},
volume = {7},
number = {20},
pages = {4395--4402},
abstract = {A chiral, highly polar, multichromophoric supermolecule has been designed by gathering seven push-pull chromophores onto a β-cyclodextrin assembling unit through covalent flexible linkers. The photophysical and nonlinear optical properties of this mutichromophoric conical bundle were investigated and compared with those of the monomeric chromophore. The strongly absorbing multichromophoric system combines interesting features: it has a high molecular first-order hyperpolarisability and a very large dipolar moment (μ=38 D) which reveal a self-arrangement of the dipolar chromophores within the supermolecule. The confinement of the push-pull chromophores within the nanoscopic bundle affects their optical properties and promotes interactions: The multichromophoric supermolecule is hypochromically and hypsochromically shifted with respect to its monomeric analogue. In addition, the close proximity promotes excitonic coupling, as well as excimer formation phenomena.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Jullien:2001a,
title = {Evaluation of the separation efficiency of some processes based on interaction of reactive species with a static, spatially periodic potential},
author = {L Jullien and A Lemarchand},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035902352&doi=10.1021%2fjp003532a&partnerID=40&md5=2cf0333f07c719f673415a9141d0597d},
doi = {10.1021/jp003532a},
year = {2001},
date = {2001-01-01},
journal = {Journal of Physical Chemistry B},
volume = {105},
number = {19},
pages = {4415--4423},
abstract = {A procedure is proposed to achieve the selective extraction of any given species from a mixture of closely related molecules exhibiting similar thermodynamic and kinetic properties. It is based on exposing the mixture to a reactive, out-of-equilibrium medium in the presence of a static and spatially periodic potential. Optimal results are obtained upon satisfying stochastic resonance conditions involving the rate constants, the diffusion coefficients of the chemical species, and the characteristic features of the periodic potential. In the case of an electric field, the corresponding relations are shown to be compatible with the current level of experimental achievement.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Jullien:2001,
title = {Evolution of a chemical system as a trajectory in a phase space. A fruitful picture of the second law},
author = {L Jullien and H Lemarchand},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035366781&partnerID=40&md5=2b72ee0bebcbb0fe5139db918d170852},
year = {2001},
date = {2001-01-01},
journal = {Journal of Chemical Education},
volume = {78},
number = {6},
pages = {803--810},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Laschewsky:2001,
title = {Thermosensitive polymer structures based on segmented copolymer networks},
author = {A Laschewsky and O Ouari and C Mangeney and L Jullien},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035022230&doi=10.1002%2f1521-3900%28200102%29164%3a1%3c293%3a%3aAID-MASY293%3e3.0.CO%3b2-M&partnerID=40&md5=a0fa089fd29cfad0974b838e97a2a438},
doi = {10.1002/1521-3900(200102)164:1<293::AID-MASY293>3.0.CO;2-M},
year = {2001},
date = {2001-01-01},
journal = {Macromolecular Symposia},
volume = {164},
pages = {293--300},
abstract = {Segmented polymer networks with LCST-behavior have been prepared by free radical initiated copolymerization of α,ω-bis-methacrylate terminated poly(methyl vinyl ether) (PMVE) with 2-hydroxy ethyl methacrylate (HEMA) or butyl acrylate (BA). The PMVE bis-macromonomers have been obtained via a semi-continuous process by end-capping the living cationic polymerization of methyl vinyl ether (MVE) with HEMA. The phase separation temperature can be varied by changing the PMVE/comonomer ratio. Incorporation of PMVE-grafts in the hydrogels increases the rate of deswelling and improves the mechanical properties. The application of the segmented networks for thermo-controllable solid phase extraction has been demonstrated by their thermosensitive adsorption behavior of toluene from a water solution.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Jullien:2000,
title = {Diffusion of reactive species tuned by modulated external fields: Application to high performance chromatography},
author = {L Jullien and A Lemarchand and H Lemarchand},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0011581281&doi=10.1063%2f1.481434&partnerID=40&md5=f676c1604ecc9229e75b9fcff8ff0f96},
doi = {10.1063/1.481434},
year = {2000},
date = {2000-01-01},
journal = {Journal of Chemical Physics},
volume = {112},
number = {19},
pages = {8293--8301},
abstract = {In order to improve the separation of any given chemical species from a mixture of compounds with close thermodynamic and kinetic properties, we propose a new chromatography procedure in the presence of a uniform time-periodic field. In the framework of a macroscopic reaction-diffusion model in an external field, we prove that the apparent motion of the chemical species is of diffusion type and determine an approximate analytical expression for the effective diffusion coefficient. Considering this coefficient as a function of the rate constants and maximizing it leads to specific relations between rate constants and field properties interpreted as stochastic resonances. In the case of an electric field, we show that these constraints are compatible with typical experimental values. © 2000 American Institute of Physics.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Berberan-Santos:2000,
title = {Multichromophoric cyclodextrins. 8. Dynamics of homo- and heterotransfer of excitation energy in inclusion complexes with fluorescent dyes},
author = {M N Berberan-Santos and P Choppinet and A Fedorov and L Jullien and B Valeur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034614079&doi=10.1021%2fja000995l&partnerID=40&md5=52ae95b5bfa2c9c36c7202004715d451},
doi = {10.1021/ja000995l},
year = {2000},
date = {2000-01-01},
journal = {Journal of the American Chemical Society},
volume = {122},
number = {48},
pages = {11876--11886},
abstract = {The water-soluble β-cyclodextrin, CD-St, with seven steroidic naphthalene chromophores linked to the primary rim, can form inclusion complexes with a merocyanine dye (DCMOH) and an oxazine dye (Ox725); the stoichiometry is 2:1 (CD-St:dye). This system works as an antenna since the dye is surrounded by 14 chromophores. The efficiency of transfer from the antenna chromophores to the encased dye was found to be close to 100%. The dynamics of this heterotransfer and homotransfer (i.e., energy hopping among the antenna chromophores) was investigated by time-resolved fluorescence intensity and time-resolved fluorescence anisotropy experiments, respectively. The distribution of rate constants for homotransfer was recovered thanks to a previously described Monte Carlo simulation from which an average rate constant was calculated and found to be about 4 x 1011 s-1. This value is about 10 times faster than the rate constant for heterotransfer in the case of Ox725, and about three times faster than in the case of DCMOH. The results are discussed in terms of interchromophoric distances, mutual orientations and Forster radii.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Gosse:1999,
title = {A new fluorescent probe for studies of interactions between hydrophobic oligonucleotides and cellular membranes},
author = {C Gosse and A S Boutorine and L Jullien and C H\'{e}l\`{e}ne},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032780790&doi=10.1080%2f07328319908044757&partnerID=40&md5=a66f0dd32d9fd907157f39ab4d0d9e6e},
doi = {10.1080/07328319908044757},
year = {1999},
date = {1999-01-01},
journal = {Nucleosides and Nucleotides},
volume = {18},
number = {6-7},
pages = {1473--1476},
abstract = {The synthesis of a new fluorescently labeled medium-sensitive lipophilic oligonucleotide is reported. A fluorescent chalcone chromophore was introduced between the 5' end of the nucleic acid and the fatty hydrocarbon chains. A blue shift of both absorption and emission wavelength maxima results from a transfer of the chromophore to a more hydrophobic medium or upon binding of the conjugate to unilamellar vesicles of egg phosphatidyl choline. These conjugates could be used as markers for cell uptake studies of lipophilic nucleic acid derivatives.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Frette:1999,
title = {Coiling of cylindrical membrane stacks with anchored polymers},
author = {V Frette and I Tsafrir and M -A Guedeau-Boudeville and L Jullien and D Kandel and J Stavans},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0001682275&doi=10.1103%2fPhysRevLett.83.2465&partnerID=40&md5=b08a889760d34f23aa3c60bb6ebac403},
doi = {10.1103/PhysRevLett.83.2465},
year = {1999},
date = {1999-01-01},
journal = {Physical Review Letters},
volume = {83},
number = {12},
pages = {2465--2468},
abstract = {We study experimentally a coiling instability of cylindrical multilamellar stacks of phospholipid membranes, induced by polymers with hydrophobic anchors grafted along their hydrophilic backbone. We interpret our experimental results in terms of a model in which local membrane curvature and polymer concentration are coupled. The model predicts the occurrence of maximally tight coils above a threshold polymer concentration. Indeed, only maximally tight coils are observed experimentally. Our system is unique in that coils form in the absence of twist and adhesion. © 1999 The American Physical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Bernard:1999,
title = {Imaging vesicle adhesion by evanescent wave-induced fluorescence},
author = {A -L Bernard and M -A Guedeau-Boudeville and L Jullien and J -M Di Meglio},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033106602&doi=10.1209%2fepl%2fi1999-00567-2&partnerID=40&md5=49cb98f45a9c22589a42dc9ffaa0630c},
doi = {10.1209/epl/i1999-00567-2},
year = {1999},
date = {1999-01-01},
journal = {Europhysics Letters},
volume = {46},
number = {1},
pages = {101--106},
abstract = {We present a new method to study the adsorption of vesicles on solid substrates, combining the use of the evanescent wave-induced fluorescence (EWIF) and classical optical microscopy. We show in this paper that our method can clearly discriminate between a spherical vesicle just touching the substrate and a spread vesicle: this method should thus be useful to design and tailor substrates for controlled adhesion.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Choppinet:1999a,
title = {Multichromophoric cyclodextrins as fluorescent sensors. Interaction of heptachromophoric β-cyclodextrins with surfactants},
author = {P Choppinet and L Jullien and B Valeur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0001332443&partnerID=40&md5=8fdc2aafe919e03c5bf3b8fac4c62aad},
year = {1999},
date = {1999-01-01},
journal = {Journal of the Chemical Society. Perkin Transactions 2},
number = {2},
pages = {249--255},
abstract = {A β-cyclodextrin derivative CD-NA bearing 7 negatively charged naphthoate chromophores is shown to strongly interact with cationic surfactants. In the absence of surfactant, the CD-NA emission spectrum is composed of two bands: one is assigned to the normal fluorescence and the other one to the fluorescence of intramolecular excimers. Interaction with a cationic surfactant leads to a drop in excimer emission. The ratio of the fluorescence intensities of the monomer and excimer bands is directly related to the concentration of the surfactant. In the case of electroactive surfactants such as cetylpyridimum chloride, the fluorescence quenching arising from photoinduced electron transfer can be additionally used for sensing. CD-NA can thus be used to detect cetyltrimethylammonium chloride (cetyl = hexadecyl) and cetylpyridinium chloride in an aqueous solution at concentrations as low as a few micromoles per litre and up to about 50 micromoles per litre. The interaction between CD-NA and cationic surfactants can be interpreted by a micellization process induced by CD-NA rather than by the formation of 1 : 1 inclusion complexes. The analogy with the interaction between cationic surfactants and polyelectrolytes bearing negative charges is outlined. It should be noted that addition of the anionic surfactant sodium dodecyl sulfate does not induce any photophysical effect.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Choppinet:1999,
title = {Multichromophoric cyclodextrins, part 7: Photophysical and structural features of inclusion complexes with fluorescent dyes},
author = {P Choppinet and L Jullien and B Valeur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032776997&partnerID=40&md5=1b37ae7ec0106c482165361a54b12291},
year = {1999},
date = {1999-01-01},
journal = {Chemistry - A European Journal},
volume = {5},
number = {12},
pages = {3666--3678},
abstract = {The synthesis of a new water-soluble β-cyclodextrin CD-St, with seven steroidic naphthalene chromophores linked to the primary rim, is reported together with the photophysical and structural features of its inclusion complexes with merocyanine and oxazine fluorescent dyes. These complexes were formed in a buffer at pH 10. At this pH the cyclodextrin is 14 times negatively charged since each chromophore bears two carboxylic groups. No excimer emission was detected, as expected from the design principles. Two complexes can be formed with stoichiometries 1:1 and 2:1 (CD:dye) for both dyes. The respective association constants were determined. In the 2:1 complexes, the cyclodextrin secondary rims are facing each other. Such complexes are outstanding artificial antennae with 14 chromophores surrounding an energy acceptor. Comparison was made with another (previously reported) water-soluble β-cyclodextrin CD-NA with seven naphthalene chromophores - also linked to the primary rim - but bearing only one carboxylic group each. In fact, CD-NA only forms 1:1 complexes with the same dyes. The difference in complexing ability of CD-NA and CD-St is discussed.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Berberan-Santos:1999,
title = {Multichromophoric cyclodextrins. 6. Investigation of excitation energy hopping by Monte-Carlo simulations and time-resolved fluorescence anisotropy},
author = {M N Berberan-Santos and P Choppinet and A Fedorov and L Jullien and B Valeur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033599566&doi=10.1021%2fja983601n&partnerID=40&md5=c22d6aad0691447e272018e264831012},
doi = {10.1021/ja983601n},
year = {1999},
date = {1999-01-01},
journal = {Journal of the American Chemical Society},
volume = {121},
number = {11},
pages = {2526--2533},
abstract = {Excitation energy transport in several β-cyclodextrins containing seven appended chromophores was studied theoretically and experimentally by steady- state and time-resolved fluorescence anisotropy. The absorption spectra compared to those of reference chromophores did not reveal significant interactions between the chromophores in the ground state, thus allowing us to assume a very weak coupling regime for energy transfer. The measured long time anisotropies were found to be in all cases close to one-seventh of the fundamental anisotropy, showing that the chromophores are randomly oriented. A realistic model in which the chromophores are in fixed positions but randomly oriented was developed to interpret the steady-state and time- resolved emission anisotropy data. A Monte-Carlo simulation based on the appropriate master equation allowed the calculation of the theoretical anisotropy decay in terms of reduced variables and parameters. The decay contains a wide spectrum of rate constants. A good fit to the experimental decays was obtained. Moreover, the nearest-neighbor distance recovered from the anisotropy and the steady-state anisotropy for all cyclodextrins (5-7 r{A} in all cases) are compatible with the nearest-neighbor distances expected from molecular modeling, which confirms the validity of the theoretical model.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}