Photolariats: synthesis, metal ion complexation and photochromism
DENISOV, Sergey A.
Institut des Sciences Moléculaires [ISM]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
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Institut des Sciences Moléculaires [ISM]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Language
en
Article de revue
This item was published in
Supramolecular Chemistry. 2012-07, vol. 24, n° 4, p. 462-472
Taylor & Francis: STM, Behavioural Science and Public Health Titles
English Abstract
Photolariat development, as an extension to the family of synthetic photochromic crown ether receptors, or photocrowns, is reported. Incorporated additional chelating groups, namely two anisoles or thioanisoles, contribute ...Read more >
Photolariat development, as an extension to the family of synthetic photochromic crown ether receptors, or photocrowns, is reported. Incorporated additional chelating groups, namely two anisoles or thioanisoles, contribute in completing the metal ion coordination sphere with different affinities and selectivities for a range of ions. Single-crystal X-ray diffraction analysis suggests that the thermally stable trans-form of the receptor is unsuitable for ion binding, consistent with spectrophotometric and NMR titration results, which is largely improved in the cis-form as the basis for the photocontrolled ion coordination/ejection. In terms of the azobenzene-containing receptor photochemistry, a photostationary state highly enriched in the cis-form (94:6, cis-/trans-) is reached, with slow thermal return (1.1-1.4 × 10− 5 s− 1) in the dark, which can undergo multiple cycles without discernable photodegradation.Read less <
English Keywords
receptor
macrocycles
photochromism
photolariat
azobenzene
European Project
Communication between Functional Molecules using Photocontrolled Ions
Origin
Hal imported