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Femtochemistry of selected di-substituted benzenes

Paper ID Volume ID Publish Year Pages File Format Full-Text
26204 43940 2016 10 PDF Available
Title
Femtochemistry of selected di-substituted benzenes
Abstract

•Overview of our work on photoreactive di-substituted benzenes.•Femtosecond transient absorption, -fluorescence, -infrared and -Raman spectroscopy.•Ultrafast hydrogen transfer and intersystem crossing.•Singlet and triplet state reactivity.•Mechanisms of photolabile protecting groups.

Ortho-di-substitution of benzenes provides the opportunity to study interactions between diverse functional groups in a defined environment. The substituents are forced to distances which allow chemical reactions to occur. In this feature article, we focus on photoreactive compounds containing nitro and carbonyl groups. The complex electronic structure of these molecules results in a rich photochemistry on the femto- and picosecond timescale. A combination of femtosecond spectroscopic techniques and quantum chemical calculations shows that all compounds studied undergo hydrogen transfers via both, singlet and triplet channels. In several cases these transfers are the starting point for further rearrangements. The experiments enabled us to elucidate the mechanisms of prominent photoreactions as the ones of ortho-nitrobenzaldehyde or of nitrobenzene derived photolabile protecting groups.

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Keywords
Nitrobenzene derivatives; Ultrafast photoreaction; Hydrogen transfer; Femtosecond spectroscopy; Intersystem crossing; Photolabile protecting group
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 318, 1 March 2016, Pages 150–159
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