Light-Controlled Molecular Switches Modulate Nanocrystal Fluorescence
- 1 June 2005
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 127 (25), 8968-8970
- https://doi.org/10.1021/ja0423421
Abstract
Spiropyran dyes were attached to fluorescent core−shell CdSe/ZnS nanocrystals via thiol-containing linkers. Photoisomerization of the dye to its merocyanine form by UV irradiation caused a dramatic loss in the intrinsic nanoparticle fluorescence, which was regained upon reversing the isomerization with visible light. The fluorescence quenching efficiency increased with increasing spectral overlap of fluorescence emission and merocyanine adsorption bands, consistent with FRET as the quenching mechanism. Typically, complete quenching required at least 80 bound dye molecules per particle.Keywords
This publication has 34 references indexed in Scilit:
- Fluorescence Resonance Energy Transfer Between Quantum Dot Donors and Dye-Labeled Protein AcceptorsJournal of the American Chemical Society, 2003
- Large-Scale Synthesis of Nearly Monodisperse CdSe/CdS Core/Shell Nanocrystals Using Air-Stable Reagents via Successive Ion Layer Adsorption and ReactionJournal of the American Chemical Society, 2003
- Synthesis of functionalized spiropyran and spirooxazine derivatives and their photochromic propertiesJournal of Photochemistry and Photobiology A: Chemistry, 2003
- Modulated structure of solid iodine during its molecular dissociation under high pressureNature, 2003
- A Mesoporous Silica Nanosphere-Based Carrier System with Chemically Removable CdS Nanoparticle Caps for Stimuli-Responsive Controlled Release of Neurotransmitters and Drug MoleculesJournal of the American Chemical Society, 2003
- Improvements in the fatigue resistances of photochromic compoundsJournal of Photochemistry and Photobiology A: Chemistry, 2001
- Photochemically-, Chemically-, and pH-Controlled Electrochemistry at Functionalized Spiropyran Monolayer ElectrodesLangmuir, 1997
- Study of the Fatigue Process and the Yellowing of Polymeric Films Containing Spirooxazine Photochromic CompoundsBulletin of the Chemical Society of Japan, 1995
- Comparative photodegradation study between spiro[indoline—oxazine] and spiro[indoline—pyran] derivatives in solutionJournal of Photochemistry and Photobiology A: Chemistry, 1993
- Photochemical ring-opening reaction of indolinespiropyrans studied by subpicosecond transient absorptionThe Journal of Physical Chemistry, 1991