Document Type

Article

Publication Date

2022

DOI

10.3390/chemosensors10100408

Publication Title

Chemosensors

Volume

10

Issue

10

Pages

408 (15 pp.)

Abstract

We leveraged chemical-induced changes to microwave signal propagation characteristics (i.e., S-parameters) to characterize the detection of aliphatic alcohol (methanol, ethanol, and 2-propanol) vapors using TCNQ-doped HKUST-1 metal-organic-framework films as the sensing material, at temperatures under 100 °C. We show that the sensitivity of aliphatic alcohol detection depends on the oxidation potential of the analyte, and the impedance of the detection setup depends on the analyte-loading of the sensing medium. The microwaves-based detection technique can also afford new mechanistic insights into VOC detection, with surface-anchored metal-organic frameworks (SURMOFs), which is inaccessible with the traditional coulometric (i.e., resistance-based) measurements.

Comments

© 2022 by the authors.

This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Original Publication Citation

Amoah, P. K., Hassan, Z. M., Franklin, R. R., Baumgart, H., Redel, E., & Obeng, Y. S. (2022). Broadband dielectric spectroscopic detection of aliphatic alcohol vapors with surface-mounted HKUST-1 MOFs as sensing media. Chemosensors, 10(10), 1-15, Article 408. https://doi.org/10.3390/chemosensors10100408

ORCID

0000-0003-3328-2692 (Amoah), 0000-0001-8272-2151 (Baumgart)

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