MersV1, Main, Exploration, bibRecordById, pubmed:14685340

Self-organization of lactates in the gas phase.

Identifieur interne : 003199 ( Main/Exploration ); précédent : 003198; suivant : 003200

Self-organization of lactates in the gas phase.

Auteurs : Nicole Borho [Allemagne] ; Martin A. Suhm

Source :

Organic & biomolecular chemistry [ 1477-0520 ] ; 2003.

RBID : pubmed:14685340

Descripteurs français

KwdFr :
- Acide lactique (), Argon (), Conformation moléculaire, Gaz (), Lactates (), Modèles moléculaires, Spectroscopie infrarouge à transformée de Fourier, Stéréoisomérie.
MESH :
- Acide lactique, Argon, Conformation moléculaire, Gaz, Lactates, Modèles moléculaires, Spectroscopie infrarouge à transformée de Fourier, Stéréoisomérie.

English descriptors

KwdEn :
- Argon (chemistry), Gases (chemistry), Lactates (chemistry), Lactic Acid (chemistry), Models, Molecular, Molecular Conformation, Spectroscopy, Fourier Transform Infrared, Stereoisomerism.
MESH :
- chemical , chemistry : Argon, Gases, Lactates, Lactic Acid.
- Models, Molecular, Molecular Conformation, Spectroscopy, Fourier Transform Infrared, Stereoisomerism.

Abstract

Chiral recognition and subsequent selective self-organisation into hydrogen-bonded n-mers is observed in supersonic methyl lactate expansions. The nu(OH) and nu(C=O)-vibrations are investigated by ragout-jet FTIR-spectroscopy and lead to the assignment of homo- and heterochiral clusters of at least three different cluster sizes. Whereas homo- and heterochiral dimers are formed in similar amounts in the racemic mixture, prominent absorptions due to different homochiral and heterochiral lactate trimers and tetramers indicate highly specific chiral self-recognition beyond molecular pairs. Chemical modification of the ester-group (methyl-, ethyl- and isopropyl-lactate) and argon admixture to the helium expansion contribute importantly to an understanding of the cluster spectra and topology.

DOI: 10.1039/b308580e
PubMed: 14685340

Affiliations:

Le document en format XML

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<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Institut für Physikalische Chemie, Universität Göttingen, Tammannstr. 6, D-37077, Göttingen</wicri:regionArea>
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<term>Molecular Conformation</term>
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<term>Stereoisomerism</term>
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<term>Modèles moléculaires</term>
<term>Spectroscopie infrarouge à transformée de Fourier</term>
<term>Stéréoisomérie</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Argon</term>
<term>Gases</term>
<term>Lactates</term>
<term>Lactic Acid</term>
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<keywords scheme="MESH" xml:lang="en"><term>Models, Molecular</term>
<term>Molecular Conformation</term>
<term>Spectroscopy, Fourier Transform Infrared</term>
<term>Stereoisomerism</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Acide lactique</term>
<term>Argon</term>
<term>Conformation moléculaire</term>
<term>Gaz</term>
<term>Lactates</term>
<term>Modèles moléculaires</term>
<term>Spectroscopie infrarouge à transformée de Fourier</term>
<term>Stéréoisomérie</term>
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<front><div type="abstract" xml:lang="en">Chiral recognition and subsequent selective self-organisation into hydrogen-bonded n-mers is observed in supersonic methyl lactate expansions. The nu(OH) and nu(C=O)-vibrations are investigated by ragout-jet FTIR-spectroscopy and lead to the assignment of homo- and heterochiral clusters of at least three different cluster sizes. Whereas homo- and heterochiral dimers are formed in similar amounts in the racemic mixture, prominent absorptions due to different homochiral and heterochiral lactate trimers and tetramers indicate highly specific chiral self-recognition beyond molecular pairs. Chemical modification of the ester-group (methyl-, ethyl- and isopropyl-lactate) and argon admixture to the helium expansion contribute importantly to an understanding of the cluster spectra and topology.</div>
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Serveur d'exploration MERS

Self-organization of lactates in the gas phase.

Self-organization of lactates in the gas phase.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

	Serveur d'exploration MERS
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