A soluble and reusable colorimetric sensor based on the covalent attachment of a triarylpentenedione to poly(ethylene glycol)

Mercedes Alvaro, Carmela Aprile, Hermenegildo García, Encarna Peris

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

3-(4-Aminophenyl)-1,5-diphenylpent-2-ene-1,5-dione (PDO) is a colorimetric sensor of Lewis acid cations that has been covalently attached to a poly(ethylene glycol) (PEG) scaffold. The resulting PDO-PEG is soluble in water and other organic solvents and acts as a colorimetric sensor of Lewis acid cations by undergoing cyclization into the triarylpyrylium form. In water, PDO-PEG also undergoes the colorimetric change in the presence of Brönsted acids, which may limit its usefulness. This modified PEG is recoverable by precipitation from cold ethanol and reusable after reopening of the triarylpyrylium heterocycle to the active pentenedione form. The testing-recovery-reuse cycle has been performed five times without noticeable differences in the response. In contrast to PDO-PEG, PDO on its own is insoluble in water and remains completely soluble in ethanol. This solubility behavior of PDO makes the molecule unsuitable for use as a reusable and recoverable sensor.

langue originaleAnglais
Pages (de - à)3045-3051
Nombre de pages7
journalEuropean Journal of Organic Chemistry
Numéro de publication14
Les DOIs
Etat de la publicationPublié - 11 juil. 2005

Empreinte digitale

Examiner les sujets de recherche de « A soluble and reusable colorimetric sensor based on the covalent attachment of a triarylpentenedione to poly(ethylene glycol) ». Ensemble, ils forment une empreinte digitale unique.

Contient cette citation