Ludovic JULLIEN

@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}
}

@article{Hamelin:1999,
title = {Self-assembly of Janus cyclodextrins at the air-water interface and in organic solvents},
author = {B Hamelin and L Jullien and A Laschewsky and C Herv\'{e} Du Penhoat},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033046267&doi=10.1002%2f%28SICI%291521-3765%2819990201%295%3a2%3c546%3a%3aAID-CHEM546%3e3.0.CO%3b2-I&partnerID=40&md5=1aa2c5f97b3dfcdef0f221c8c886e0dc},
doi = {10.1002/(SICI)1521-3765(19990201)5:2<546::AID-CHEM546>3.0.CO;2-I},
year = {1999},
date = {1999-01-01},
journal = {Chemistry - A European Journal},
volume = {5},
number = {2},
pages = {546--556},
abstract = {The self-organization of various amphiphilic cyclodextrins is reported at the air-water interface as well as in organic solvents. These rather rigid molecules expose different molecular surfaces to the external medium according to the nature of the environment, and consequently several types of association are observed. At the air-water interface, stable mono-and multilayers are formed whose behavior can be related to the molecular structure of the amphiphilic compounds. In apolar aromatic solvents, such as benzene or toluene, dimerization occurs as shown by vapour pressure osmometry (VPO), 1H NMR spectroscopy and 1H13C heteronuclear NOE measurements. Such a feature is absent in organic solvents that compete for the formation of hydrogen bonds. The consequences of these results concerning the use of cyclodextrin derivatives as calibration standards for the determination of molecular weights are discussed.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Jullien:1999,
title = {Thermodynamic Behavior of a Supramolecular System Self-Assembled by Electrostatic Interaction in Aqueous Solution. Results and Theoretical Analysis},
author = {L Jullien and H Cottet and B Hamelin and A Jardy},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0001597844&partnerID=40&md5=ea841685fb09dc1a9df850eb4e6a2b9f},
year = {1999},
date = {1999-01-01},
journal = {Journal of Physical Chemistry B},
volume = {103},
number = {49},
pages = {10866--10875},
abstract = {The acid-base and association properties of oppositely charged cyclodextrins in aqueous solution have been investigated by potentiometry. The experimental thermodynamic constants can be analyzed with a theoretical approach leading to structural data in satisfactory agreement with the crystallographic structures of the parent compounds and previous NMR investigations. The corresponding theory is expected to be helpful for understanding and for predicting the behavior of many supramolecular systems involving charged organic molecules.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Blanchard-Desce:1999,
title = {Towards highly efficient nonlinear optical chromophores: molecular engineering of octupolar molecules},
author = {M Blanchard-Desce and J -B Baudin and L Jullien and R Lome and O Ruel and S Brasselet and J Zyss},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032599630&doi=10.1016%2fS0925-3467%2899%2900059-2&partnerID=40&md5=608ca6fec7e1b491b2489ad8d402903e},
doi = {10.1016/S0925-3467(99)00059-2},
year = {1999},
date = {1999-01-01},
volume = {12},
number = {2},
pages = {333--338},
abstract = {Octupolar molecules are of particular interest in the field of nonlinear optics due to their potentially large two or three-dimensional quadratic nonlinearities. In order to design molecules combining enhanced first hyperpolarizabilities and excellent transparency, we have implemented an original strategy based upon adequate functionalization of an orthogonalized biphenyl core. We have designed novel 3-dimensional all-organic octupoles of D2d symmetry and investigated their optical nonlinearities by performing harmonic light scattering experiments in solution. By grafting four electron-donating and/or electron withdrawing substituents on the central biphenyl unit, large molecular nonlinearities (β) have been achieved while maintaining full transparency in the visible range. Molecules displaying larger nonlinearities and better transparency than pNA have been obtained. Molecular optimization has been further pursued via tethering elongated conjugated spikes on the central biphenyl core and taking advantage of multidimensional charge transfer leading to 3D-octupolar molecules displaying both larger nonlinearity and broader transparency than DR1 (up to βxyz = 145 × 10-30 esu with λmax = 400 nm).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Jullien:1998,
title = {How does the gibbs free energy evolve in a system undergoing coupled competitive reactions?},
author = {L Jullien and A Proust and J -C Le Menn},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0039784723&partnerID=40&md5=9b76ac0d9cea46672dc9ee93fc16e5be},
year = {1998},
date = {1998-01-01},
journal = {Journal of Chemical Education},
volume = {75},
number = {2},
pages = {194--199},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Hamelin:1998,
title = {Self-assembly of a molecular capsule driven by electrostatic interaction in aqueous solution},
author = {B Hamelin and L Jullien and C Derouet and C H Du Penhoat and P Berthault},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032569193&doi=10.1021%2fja980046g&partnerID=40&md5=c9d806283a479743d90bfd37476a326d},
doi = {10.1021/ja980046g},
year = {1998},
date = {1998-01-01},
journal = {Journal of the American Chemical Society},
volume = {120},
number = {33},
pages = {8438--8447},
abstract = {A self-assembling molecular capsule based on electrostatic interaction has been designed and its structure is investigated by dynamic 1H NMR. The hydrodynamic description resulting from relaxation and PGSE 1H NMR experiments indicates that association between oppositely charged hydrophilic β-cyclodextrin derivatives in 50 mM KCl aqueous solution corresponds to dimerization with an interdistance between interacting units lying in the 0.4-1.1 nm range with a maximal probability at 0.6 nm.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Hamelin:1997,
title = {Does aggregation modulate the apparent association constant of host-guest complexes and related species?},
author = {B Hamelin and L Jullien},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33748597387&doi=10.1039%2fa700730b&partnerID=40&md5=d8bad9212598488e98e6367d09cd6f83},
doi = {10.1039/a700730b},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Chemical Society - Faraday Transactions},
volume = {93},
number = {12},
pages = {2153--2160},
abstract = {The present paper illustrates the consequences of aggregation phenomena on the apparent association constant of a host-guest system in three different cases. In the first, the guest gives aggregates whereas in the second the host exhibits aggregation while maintaining a constant affinity for the guest. In the last case under examination, it is the host-guest species that is assumed to aggregate. Numerical simulations based on widely used experimental protocols emphasized the significance of aggregation phenomena on apparent association constants under a broad range of circumstances. The possible relevance of the present analysis to real systems is discussed.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}