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Polyacrylates containing dansyl semicarbazide units sensitive for some structures in solution and film

Paper ID Volume ID Publish Year Pages File Format Full-Text
27591 44031 2010 7 PDF Available
Title
Polyacrylates containing dansyl semicarbazide units sensitive for some structures in solution and film
Abstract

Two dansylated copolymers have been synthesized by free radical polymerization of N-methacryloyloxyethylcarbamoyl-5-(dimethylaminonaphthalene-1-sulfonohydrazine) (DnsSA) and N-dodecylacrylamide or methyl methacrylate with 1,1′-azobis (cyclohexanecarbonitrile) as the initiator. The structure and the chemical composition of the formed copolymers (DnsSA-DA; DnsSA-MMA) were confirmed by spectral analysis (1H NMR, FTIR, UV/vis), thermal methods, GPC measurements, and AFM technique. Compared with DnsSA (λem = 525 nm/DMF; 515 nm/CHCl3), the emission spectra of DnsSA-DA in DMF exhibited a time- and concentration-dependent monomer and excimer fluorescence (430 nm; 520 nm), while in CHCl3 only the excimer form exists for both copolymers. The sensing ability of these copolymers in both the solvents has been investigated by fluorescence spectroscopy in tandem with quenching experiments using various metal ions (Cu2+, Fe2+, Ni2+) and nitroaromatics (picric acid, p-nitrotoluene, o-nitrophenol, dinitro-m-xylene, nitrobenzene), which suggested that such polymeric fluorophores could find applications for detection of some metal ions as well as nitro-derivatives in DMF solutions, the most efficient quencher being Cu2+ and picric acid in the case of DnsSA-DA. The fluorescence study showed that the fluorescence emission in film state can be also quenched by nitrobenzene vapors, and further, an excellent reversibility of this process was observed.

Keywords
Copolymerization; Polyacrylates; Dansyl semicarbazide; Fluorescence
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Polyacrylates containing dansyl semicarbazide units sensitive for some structures in solution and film
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 213, Issues 2–3, 25 June 2010, Pages 107–113
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
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