Pyrene-modified quartz crystal microbalance for the detection of polynitroaromatic compounds

Vaiyapuri, Rajendran, Greenland, Barnaby W, Elliott, Joanne M, Hayes, Wayne, Bennett, Roger A, Cardin, Christine J, Colquhoun, Howard M, Etman, Haitham and Murray, Claire A (2011) Pyrene-modified quartz crystal microbalance for the detection of polynitroaromatic compounds. Analytical Chemistry, 83 (16). pp. 6208-6214. ISSN 0003-2700

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Abstract

The synthesis of a dithiol-functionalized pyrene derivative is reported, together with studies of interactions between this receptor (and other related pyrenes) and nitroaro- matic compounds (NACs), in both solution and in the solid state. Spectroscopic analysis in solution and X-ray crystallo- graphic analysis of cocrystals of pyrene and NACs in the solid state indicate that supramolecular interactions lead to the formation of defined π π stacked complexes. The dithiol- functionalized pyrene derivative can be used to modify the surface of a gold quartz crystal microbalance (QCM) to create a unique π-electron rich surface, which is able to interact with electron poor aromatic compounds. For example, exposure of the modified QCM surface to the nitroaromatic compound 2,4-dinitrotoluene (DNT) in solution results in a reduction in the resonant frequency of the QCM as a result of supramolecular interactions between the electron-rich pyrenyl surface layer and the electron-poor DNT molecules. These results suggest the potential use of such modified QCM surfaces for the detection of explosive NACs

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry
Depositing User: Barnaby Greenland
Date Deposited: 18 Apr 2018 09:50
Last Modified: 20 Feb 2019 11:26
URI: http://sro.sussex.ac.uk/id/eprint/75180

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