Amoah, P.
, Obeng, Y.
, Hassan, Z.
, Franklin, R.
, Baumgart, H.
and Redel, E.
(2022),
Broadband Dielectric Spectroscopic Detection of Aliphatic Alcohol Vapors with surface mounted HKUST-1 MOFs as Sensing Media, Chemsensors, [online], https://doi.org/10.3390/chemosensors10100408, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935249
(Accessed October 21, 2025)
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Broadband Dielectric Spectroscopic Detection of Aliphatic Alcohol Vapors with surface mounted HKUST-1 MOFs as Sensing Media
Published
Author(s)
, , Zeinab Hassan, Rhonda Franklin, Helmut Baumgart, Engelbert Redel
Abstract
We have 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 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, while the impedance of the detection setup depends on the analyte-loading of the sensing medium. The microwaves-based detection technique can afford new mechanistic insights into the VOC detection, with surface anchored metal-organic frameworks, that are inaccessible with the traditional coulometric (i.e., resistance-based) measurements.Citation
Chemsensors
Volume
10
Pub Type
Journals
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Created October 10, 2022, Updated November 29, 2022