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Enhanced photocycloreversion reaction of diarylethene polymers attached to gold nanoparticles in the solid state

Paper ID Volume ID Publish Year Pages File Format Full-Text
26737 43973 2011 5 PDF Available
Title
Enhanced photocycloreversion reaction of diarylethene polymers attached to gold nanoparticles in the solid state
Abstract

The photochromic reactivity of diarylethene polymers attached to gold nanoparticle in the solid state was investigated. The photochromic diarylethene polymers around the gold nanoparticle exhibited reversible photochromism upon alternating irradiation with ultraviolet (UV) and visible light even in the solid state. The local surface plasmon resonance (LSPR) band of the gold nanoparticle in the solid state was red-shifted in comparison with that dispersed in a solution because of the closer interparticle distance. Alternating irradiation with UV and visible light led to the photoreversible changes in the LSPR band because the refractive index of the diarylethene polymer shell changes along with the photochromic reaction of the diarylethene polymers. However, the behavior of the spectral changes significantly depended on the irradiation wavelength. It reveals that the photocycloreversion reaction heterogeneously took place in the shell of the diarylethene polymers upon irradiation at longer wavelength to be enhanced in proximity to the gold nanoparticles. The promotion of the photoreaction is due to the plasmonic enhancement effect both in the vicinity and in the gap of the gold nanoparticles.

► We prepared gold nanoparticle covered with a diarylethene polymer. ► The LSPR band of the gold nanoparticle was red-shifted in the solid state. ► Photocycloreversion reaction of diarylethene was enhanced by the gold nanoparticles. ► The enhancement is in the vicinity and in the gap of the gold nanoparticles.

Keywords
Gold nanoparticle; Surface plasmon; Diarylethene; Photochromism
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Enhanced photocycloreversion reaction of diarylethene polymers attached to gold nanoparticles in the solid state
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 221, Issues 2–3, 25 June 2011, Pages 256–260
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us