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In-situ photoisomerization for aggregation-induced emission of dibiphenyl fumaronitrile

Paper ID Volume ID Publish Year Pages File Format Full-Text
26127 43935 2015 4 PDF Available
Title
In-situ photoisomerization for aggregation-induced emission of dibiphenyl fumaronitrile
Abstract

•A novel fumaronitrile core-based π-conjugated molecule comprising two biphenyl aggregation-induced emission activators was synthesized•Emission from the Z-isomer was more intense than that of the E-isomer due to conformational restriction.•In-situ photoisomerization in the H2O-induced aggregated state proceeded successfully upon light illumination.

The synthesis and photochemical characteristics of a fumaronitrile (FN)-based π-conjugated molecule, dibiphenyl fumaronitrile (BP-FN), comprising two biphenyl aggregation-induced emission (AIE) activators linked by an FN core were investigated. Upon illumination with a UV light, the emission from the Z-isomer, (Z)BP-FN, was more intense than that of the E-isomer, (E)BP-FN, due to conformational restriction of the former. (E)BP-FN exhibited J-aggregation behavior in mixed THF–H2O solvents when the H2O content exceeded 70 vol%, illustrative of typical AIE characteristics. (Z)BP-FN presented significant aggregation causing quenching in emission when the H2O content exceeded 80 vol%. In-situ photoisomerization of (E)BP-FN to (Z)BP-FN proceeded successfully even in the H2O-induced aggregated state in THF solution; however, the emission of the in-situ photoisomerized (Z)BP-FN aggregates was significantly quenched in solutions with high H2O contents of above 80 vol%.

Graphical abstractIn-situ photoisomerization of (E)BP-FN to (Z)BP-FN proceeded successfully even in the H2O-induced aggregated state in THF solution, exhibiting aggregation induced emission and aggregation causing quenching emission in (E)BP-FN and (Z)BP-FN aggregates, respectively.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Aggregation; Fumaronitrile; Photoisomerization; Emission; Quenching
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In-situ photoisomerization for aggregation-induced emission of dibiphenyl fumaronitrile
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 311, 1 October 2015, Pages 199–202
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