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Quantitative analysis of the dynamic behaviour of photochromic systems

Paper ID Volume ID Publish Year Pages File Format Full-Text
31457 44791 2011 32 PDF Available
Title
Quantitative analysis of the dynamic behaviour of photochromic systems
Abstract

The good understanding of a photochromic reaction mechanism requires the establishment of the list of all the transient species and the definition of their connecting processes. The purpose of kinetic studies is the determination of the main photochromic parameters, such as the quantum yields of photoisomerization, rate constants of thermal relaxation and spectra of transient species. These data allow the establishment of structure properties relationships in order to select the best substituents to improve photochromic performances within a given series. In this review, we describe the dynamic behaviour of various photochromic systems during thermal relaxation after irradiation, from the simplest mono-exponential decay to the more complicated multi-exponential dynamics. Then, we analyse the evolution of the long-lived isomers under continuous irradiation. Several pedagogical examples and tricks to perform easy kinetic analysis are given in the appendices.

► Dynamic behaviour of various photochromic systems deeply presented. ► Thermal relaxation from the mono-exponential to the multi-exponential dynamics. ► Analysis of the evolution of the long-lived isomers under continuous irradiation. ► Several pedagogical examples and tricks to perform easy kinetic analysis.

Keywords
Photochromism; Kinetic analysis; Multi-species systems; Multi-processes; Photochemical processes; Thermal relaxation
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Quantitative analysis of the dynamic behaviour of photochromic systems
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology C: Photochemistry Reviews - Volume 12, Issue 2, September 2011, Pages 74–105
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