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Synthesis and properties of novel photochromic biindenylidenedione derivative bearing TEMPO radical

Paper ID Volume ID Publish Year Pages File Format Full-Text
29149 44127 2008 7 PDF Available
Title
Synthesis and properties of novel photochromic biindenylidenedione derivative bearing TEMPO radical
Abstract

Stable nitroxide radical TEMPO was introduced to the benzene rings of novel photochromic 7,7′-dimethyl-[2,2′-bi-1H-indene]-3,3′-diethyl-3,3′-dihydroxy-1,1′-dione (compound 1), leading to the synthesis of novel multifunctional title compound 4. The photochromic property, magnetic property and ESR spectroscopy of the title compound were investigated. Compound 4 possesses visible photochromism upon photoirradiation, and its ESR signal undergoes secular broadening after photoirradiation. The magnetic susceptibility measurement shows that the antiferromagnetic interaction for 4 becomes stronger after photoirradiation. In compound 4 there are two kinds of spin center after photoirradiation: one is TEMPO radical, and another is photo-generated radical of two indanone moieties. Our results demonstrated that the colour and magnetic property of compound 4 could be controlled by photoirradiation.

Keywords
Dimethyl-[2,2′-bi-1H-indene]-diethyl-3,3′-dihydroxy-1,1′-dione; Synthesis; Photo-controlled magnetism; Photochromism; Organic solid material
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Synthesis and properties of novel photochromic biindenylidenedione derivative bearing TEMPO radical
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 194, Issues 2–3, 20 February 2008, Pages 122–128
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
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