title: Multichromophoric sugar for fluorescence photoswitching.
abstract: A multichromophoric glucopyranoside 2 bearing three dicyanomethylenepyran (DCM) fluorophores and one diarylethene (DAE) photochrome has been prepared by Cu(I)-catalyzed alkyne-azide cycloaddition reaction. The fluorescence of 2 was switched off upon UV irradiation, in proportion with the open to closed form (OF to CF) conversion extent of the DAE moiety. A nearly 100% Förster-type resonance energy transfer (FRET) from all three DCM moieties to a single DAE (in its CF) moiety was achieved. Upon visible irradiation, the initial fluorescence intensity was recovered. The observed photoswiching is reversible, with excellent photo resistance.
authors.affiliation: PPSM, ENS Cachan, CNRS, UMR8531, 61 avenue du Président Wilson, 94235 Cachan cedex, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Maisonneuve
authors.affiliation: PPSM, ENS Cachan, CNRS, UMR8531, 61 avenue du Président Wilson, 94235 Cachan cedex, France.
authors.forename: Rémi
authors.initials: R
authors.lastname: Métivier
authors.affiliation: LCI, ICMMO, CNRS, Université Paris-Sud, 15 rue Georges Clémenceau, 91405 Orsay Cedex, France.
authors.forename: Pei
authors.initials: P
authors.lastname: Yu
authors.affiliation: PPSM, ENS Cachan, CNRS, UMR8531, 61 avenue du Président Wilson, 94235 Cachan cedex, France.
authors.forename: Keitaro
authors.initials: K
authors.lastname: Nakatani
authors.affiliation: PPSM, ENS Cachan, CNRS, UMR8531, 61 avenue du Président Wilson, 94235 Cachan cedex, France.
authors.forename: Juan
authors.initials: J
authors.lastname: Xie
keywords: click chemistry; energy transfer; fluorophore; monosaccharide; photochromism