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

journal contribution
posted on 2023-06-09, 12:54 authored by Rajendran Vaiyapuri, Barnaby GreenlandBarnaby Greenland, Joanne M Elliott, Wayne Hayes, Roger A Bennett, Christine J Cardin, Howard M Colquhoun, Haitham Etman, Claire A Murray
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 p p 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 p-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

History

Publication status

  • Published

File Version

  • Published version

Journal

Analytical Chemistry

ISSN

0003-2700

Publisher

American Chemical Society

Issue

16

Volume

83

Page range

6208-6214

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2018-04-18

First Compliant Deposit (FCD) Date

2018-04-18

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