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Network reaction of 2,6-bis(2-hydroxybenzilidene)cyclohexanone by external stimuli

Paper ID Volume ID Publish Year Pages File Format Full-Text
26608 43966 2014 7 PDF Available
Title
Network reaction of 2,6-bis(2-hydroxybenzilidene)cyclohexanone by external stimuli
Abstract

•pH-dependent photochromic behaviour of a curcumin analogue, 2,6-bis(2-hydroxybenzilidene)cyclohexanone (HBC).•Stable species identification on pH ranges.•pH sensor behaviour of HBC.•Theoretical calculations vs. experimental data.•Fluorescent properties.

The pH-dependent photochromic behaviour of a curcumin analogue, 2,6-bis(2-hydroxybenzilidene)cyclohexanone (HBC) has been investigated. The identification of stable and unstable species from network reaction was done by combination of NMR, UV–vis and fluorescence spectroscopy. The structure of stable species was established by 13C NMR, 1H NMR and 2D NMR spectra: DQF-COSY, HSQC and HMBC. The results indicate that HBC could be used as pH sensor on a 1–5 scale. Experimental results were correlated by theoretical calculations using ZINDO/S/CI semi-empirical methods. HBC exhibits fluorescent properties both in acidic and neutral media and in basic environment the fluorescence is quenched.

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Keywords
Photochromism; Curcumin analogue; Conjugated system; pH sensor
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Network reaction of 2,6-bis(2-hydroxybenzilidene)cyclohexanone by external stimuli
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 283, 1 June 2014, Pages 22–28
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