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A Polymer To Detect Explosives : Towards An Effective Sensor Material

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posted on 24.05.2021, 17:00 by Sofija Katić
There are upwards of 100 million landminds in over 70 countries. Nitroaromatic vapours emanate from landmines and a need exists for a sensitive and robust sensor for their detection. It is the goal of this study to develop a thin, reusable, fluorescent film composed of ß-cyclodextrin polymer crosslinked with epichlorohydrin, for the detection of nitroaromatics. The fluorescent moiety, 2-naphthol, (sensing function) was incorporated into the ß-cyclodextrin-epichlorohydrin polymer (trapping function). Fluorimetry, FTIR and ¹H NMR were employed to characterize the polymer and examine whether 2-naphthol was covalently linked to the ß-cyclodextrin polymer network. Fluorescence quenching studies were conducted using a nitroaromatic compound, nitrobenzene, to determine the quenching efficiency. The characterization studies indicate that 2-naphthol is incorporated into ß-cyclodextrin-epichlorohydrin polymer. A difference does not seem to exist in the quenching efficiency of free 2-naphthol, 2-naphthol:ß-cyclodextrin complex and the polymers by nitrobenzene.

History

Language

eng

Degree

Master of Applied Science

Program

Environmental Applied Science and Management

Granting Institution

Ryerson University

LAC Thesis Type

Thesis

Thesis Advisor

Christopher H. Evans