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A Focus on Triazolium as a Multipurpose Molecular Station for pH-Sensitive Interlocked Crown-Ether-Based Molecular Machines.

Coutrot F - ChemistryOpen (2015)

Bottom Line: This can result in variations of physical or chemical properties.It also served as a molecular barrier in order to lock interlaced structures or to compartmentalize interlocked molecular machines.This review describes the recently reported examples of pH-sensitive triazolium-containing molecular machines and their peculiar features.

View Article: PubMed Central - PubMed

Affiliation: Supramolecular Machines and Architectures Team, Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 Cnrs, Faculté des Sciences, Université Montpellier, ENSCM Bâtiment Chimie (17), 3ème étage, Place Eugène Bataillon, case courrier 1706, 34095, Montpellier cedex 5, France.

ABSTRACT
The control of motion of one element with respect to others in an interlocked architecture allows for different co-conformational states of a molecule. This can result in variations of physical or chemical properties. The increase of knowledge in the field of molecular interactions led to the design, the synthesis, and the study of various systems of molecular machinery in a wide range of interlocked architectures. In this field, the discovery of new molecular stations for macrocycles is an attractive way to conceive original molecular machines. In the very recent past, the triazolium moiety proved to interact with crown ethers in interlocked molecules, so that it could be used as an ideal molecular station. It also served as a molecular barrier in order to lock interlaced structures or to compartmentalize interlocked molecular machines. This review describes the recently reported examples of pH-sensitive triazolium-containing molecular machines and their peculiar features.

No MeSH data available.


Related in: MedlinePlus

A chiral switchable triazolium-containing rotaxane catalyst for stereoselective conjugated addition. Reagents and conditions: a) NaOH; b) 1) HCl, 2) KPF6.
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sch07: A chiral switchable triazolium-containing rotaxane catalyst for stereoselective conjugated addition. Reagents and conditions: a) NaOH; b) 1) HCl, 2) KPF6.

Mentions: The same authors recently extended their work by synthesizing the chiral pH-sensitive rotaxane molecular switch 15/16, which proved to catalyze conjugated additions, only at the deprotonated state, through the iminium ion activation and notably with high stereoselectivity (Scheme 7).26


A Focus on Triazolium as a Multipurpose Molecular Station for pH-Sensitive Interlocked Crown-Ether-Based Molecular Machines.

Coutrot F - ChemistryOpen (2015)

A chiral switchable triazolium-containing rotaxane catalyst for stereoselective conjugated addition. Reagents and conditions: a) NaOH; b) 1) HCl, 2) KPF6.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4608521&req=5

sch07: A chiral switchable triazolium-containing rotaxane catalyst for stereoselective conjugated addition. Reagents and conditions: a) NaOH; b) 1) HCl, 2) KPF6.
Mentions: The same authors recently extended their work by synthesizing the chiral pH-sensitive rotaxane molecular switch 15/16, which proved to catalyze conjugated additions, only at the deprotonated state, through the iminium ion activation and notably with high stereoselectivity (Scheme 7).26

Bottom Line: This can result in variations of physical or chemical properties.It also served as a molecular barrier in order to lock interlaced structures or to compartmentalize interlocked molecular machines.This review describes the recently reported examples of pH-sensitive triazolium-containing molecular machines and their peculiar features.

View Article: PubMed Central - PubMed

Affiliation: Supramolecular Machines and Architectures Team, Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 Cnrs, Faculté des Sciences, Université Montpellier, ENSCM Bâtiment Chimie (17), 3ème étage, Place Eugène Bataillon, case courrier 1706, 34095, Montpellier cedex 5, France.

ABSTRACT
The control of motion of one element with respect to others in an interlocked architecture allows for different co-conformational states of a molecule. This can result in variations of physical or chemical properties. The increase of knowledge in the field of molecular interactions led to the design, the synthesis, and the study of various systems of molecular machinery in a wide range of interlocked architectures. In this field, the discovery of new molecular stations for macrocycles is an attractive way to conceive original molecular machines. In the very recent past, the triazolium moiety proved to interact with crown ethers in interlocked molecules, so that it could be used as an ideal molecular station. It also served as a molecular barrier in order to lock interlaced structures or to compartmentalize interlocked molecular machines. This review describes the recently reported examples of pH-sensitive triazolium-containing molecular machines and their peculiar features.

No MeSH data available.


Related in: MedlinePlus