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573 results on '"Dutasta, Jean-Pierre"'

155. Supramolecular Sensing with Phosphonate Cavitands

Author

Melegari, Monica, primary, Suman, Michele, additional, Pirondini, Laura, additional, Moiani, Davide, additional, Massera, Chiara, additional, Ugozzoli, Franco, additional, Kalenius, Elina, additional, Vainiotalo, Pirjo, additional, Mulatier, Jean‐Christophe, additional, Dutasta, Jean‐Pierre, additional, and Dalcanale, Enrico, additional

Published
2008
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159. A fluorescent heteroditopic hemicryptophane cage for the selective recognition of choline phosphate.

Author

Gao, Guohua, Zhang, Dawei, Guy, Laure, Dutasta, Jean-Pierre, Martinez, Alexandre, and Robert, Vincent

Subjects
FLUORESCENCE quenching, ZWITTERIONS, NEUROTRANSMITTERS, CRYPTOPHANE, NUCLEAR magnetic resonance, COMPLEXATION reactions
Abstract

The first fluorescent hemicryptophane cage was synthesized and developed as an efficient and selective sensor for choline phosphate. The heteroditopic character of the host in the recognition process was evidenced. NMR experiments highlight a full encapsulation of the guest, inducing the chiralisation-like behavior of the achiral choline phosphate. [ABSTRACT FROM AUTHOR]

Published
2015
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161. Xe NMR to probe hydrophobic cavities

Author

EUCHEM Conference on Stereochemistry - Burgenstock (34: 24-30 avril 1999: Brunnen (Suisse)), Bartik, Kristin, Luhmer, Michel, Dutasta, Jean-Pierre, Collet, André, Reisse, Jacques, EUCHEM Conference on Stereochemistry - Burgenstock (34: 24-30 avril 1999: Brunnen (Suisse)), Bartik, Kristin, Luhmer, Michel, Dutasta, Jean-Pierre, Collet, André, and Reisse, Jacques

Abstract

info:eu-repo/semantics/nonPublished

Published
1999

164. Optimization of Xenon Biosensors for Detection of Protein Interactions

Author

Lowery, Thomas J., primary, Garcia, Sandra, additional, Chavez, Lana, additional, Ruiz, E. Janette, additional, Wu, Tom, additional, Brotin, Thierry, additional, Dutasta, Jean‐Pierre, additional, King, David S., additional, Schultz, Peter G., additional, Pines, Alex, additional, and Wemmer, David E., additional

Published
2006
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185. Synthesis, Conformational Studies, X-ray Structures, and Complexation Properties of Semirigid Macrocyclic Phosphonamides.

Author

UCL, Delangle, Pascale, Dutasta, Jean-Pierre, Van Oostenryck, Luc, Tinant, Bernard, Declercq, Jean-Paul, UCL, Delangle, Pascale, Dutasta, Jean-Pierre, Van Oostenryck, Luc, Tinant, Bernard, and Declercq, Jean-Paul

Abstract

The semirigid phosphonamide ligands 1-5 have been synthesized from the macrocyclic precursors 6-9 by reaction with 1,3-propanediol ditosylate or 1,2-dichloroethane. For the thiophosphoryl compounds 1 and 2, and the phosphoryl derivative 5, the reactions were carried out in biphasic aqueous NaOH solutions. The phosphoryl derivatives 3 and 4 were better obtained from NaH in anhydrous tetrahydrofuran. The conformations of the hosts in solution were deduced from low-temperature NMR and NOE difference experiments. Conformational equilibria between exo and endo forms are observed for the 18-membered macrocycles 1 and 3. The exo conformer predominates in solution for the 21-membered macrocycle 2, whereas 4 exists as rapidly exchanging conformers. The X-ray crystal structures of macrocycles 1, 2, and 5 have been determined as well as the complexes 1.Hg(SCN)(2) and 5.LiNO(3). In the Hg(2+) complex the metal ion is located out of the macrocyclic cavity and is coordinated to the thiophosphoryl unit. In 5.LiNO(3)()()the Li(+) cation is located inside the macrocyclic cavity and is coordinated to a tetrahedral array of oxygen donors. Free energies of complexation (DeltaG degrees ) of the phosphorylated ligands 3-5 with alkali metal and ammonium cations were determined in CHCl(3) saturated with H(2)O by picrate extraction experiments. The -DeltaG degrees values are greatest for 4 complexing K(+) and NH(4)(+) (7.3 and 8.0 kcal/mol, respectively). The relationships between structure and binding are discussed.

Published
1996

186. New Phosphorylated Hosts for the Design of New Supramolecular Assemblies.

Author

Majoral, Jean-Pierre and Dutasta, Jean-Pierre

Abstract

Copyright of New Aspects in Phosphorus Chemistry IV is the property of Springer eBooks and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2004
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190. Azaphosphatrane Organocatalysts in Confined Space: Cage Effect in CO2 Conversion.

Author

Chatelet, Bastien, Joucla, Lionel, Dutasta, Jean‐Pierre, Martinez, Alexandre, and Dufaud, Véronique

Subjects
ORGANOCATALYSIS, CAGE effect (Chemistry), CYCLIC compounds, CARBONATES, CARBON dioxide
Abstract

The endohedral functionalization of a molecular cage by an azaphosphatrane unit has allowed for the creation of highly engineered catalytic cavities for efficient conversion of CO 2 into cyclic carbonates. Strong structure/activity/stability correlations have been demonstrated by careful adjustment of the size, shape, and electronic properties of the hemicryptophane host. [ABSTRACT FROM AUTHOR]

Published
2014
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196. Dynamic and rotational analysis of cryptophane host-guest systems: challenges of describing molecular recognition

Author

Kirchhoff, Paul D., Dutasta, Jean-Pierre, Collet, Andre, and McCammon, J. Andrew

Subjects
Molecular dynamics -- Research, Aromatic compounds -- Research, Chemistry
Abstract

Three 25 ns molecular dynamics simulations were conducted on uncomplexed cryptophane, the cryptophane-tetramethylammonium ion (TMA+) complex and the cryptophane-neopentane (NEO) complex. Despite the similarity between TMA+ and NEO, the complexes they form with the cryptophane were different. The influence of the presence of these guests on motions of the host were analyzed, as well as the preferred orientation and motions of the guests relative to cryptophane.

Published
1999

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