One‐pot photoinduced synthesis of dansyl containing acrylamide hydrogels and their chemosensing properties. Issue 8 (4th October 2018)

• Record Type: Journal Article
• Authors: Uygun, M.; Doganci, E.; Tasdelen, M. A.; Gurek, A. G.
• Is Part Of: Journal of applied polymer science. Volume 136:Issue 8(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-10-04
• Subjects: dansyl -- heavy metal ion‐sensing -- hydrogels -- nitroaromatic compounds -- photoinitiation; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.47096
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Novel fluorescent acrylamide hydrogel containing dansyl moiety (DNS‐gel) was synthesized via free‐radical photopolymerization of acrylamide/ N, N′ ‐methylenebisacrylamide by using dansyl chloride as a photoinitiator. DNS‐gel presented dual‐fluorescence emission when excited at 344 nm in acetonitrile:water (1:1) solvent system due to twisted intramolecular charge transfer between dimethylamino and naphthalene units in the dansyl moiety. Synthesized fluorophore containing gel was utilized as a fluorescent sensor against specific metal ions (Pb 2+, Hg 2+, Co 2+, Cd 2+, Mn 2+, and Zn 2+ ) and nitroaromatic compounds [1, 2‐dinitrobenzene, 2, 4, 6‐trinitro‐1‐phenol [picric acid (PA)], 4‐nitrophenol, 2, 4, 6‐trinitrotoluene, 2, 4‐dinitrophenol (2, 4‐DNP), and 2‐nitrotoluene]. Fluorescence intensity of DNS‐gel was diminished by degrees upon the infusion of metal ions and nitroaromatics. For all compounds, the greatest quenching effectiveness was attained in the presence of Co 2+ (72.56%), PA (88.55%), and 2, 4‐DNP, suggesting that DNS‐gel could be employed as a potential Co 2+, PA, and 2, 4‐DNP chemical probes. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019, 136, 47096. Abstract : Dansyl containing hydrogels as fluorescent sensors are directly prepared by photopolymerization of acrylamide/N, N′‐methylenebisacrylamide using dansyl chloride as a photoinitiator.