Broadband Dielectric Spectroscopic Detection of Aliphatic Alcohol Vapors with Surface-Mounted HKUST-1 MOFs as Sensing Media †

Papa K. Amoah; Zeinab Mohammed Hassan; Rhonda R. Franklin; Helmut Baumgart; Engelbert Redel; Yaw S. Obeng

doi:10.3390/chemosensors10100408

Broadband Dielectric Spectroscopic Detection of Aliphatic Alcohol Vapors with Surface-Mounted HKUST-1 MOFs as Sensing Media †

Papa K. Amoah, Zeinab Mohammed Hassan, Rhonda R. Franklin, Helmut Baumgart, Engelbert Redel, Yaw S. Obeng

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

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.

Original language	English (US)
Article number	408
Journal	Chemosensors
Volume	10
Issue number	10
DOIs	https://doi.org/10.3390/chemosensors10100408
State	Published - Oct 2022

Bibliographical note

Funding Information:
E.R. acknowledges financial support by the Deutsche Forschungsgemeinschaft (DFG) within the Priority Program COORNET (Grant No. SPP 1928). P.K.A. and H.B. acknowledge financial help from Old Dominion University.

Publisher Copyright:
© 2022 by the authors.

Keywords

aliphatic alcohol vapor detection
broadband dielectric microwave spectroscopy
HKUST-1 metal–organic framework (MOF) sensing material
TCNQ-HKUST-1 SURMOF, thin film sensing material
VOC detection

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10.3390/chemosensors10100408

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title = "Broadband Dielectric Spectroscopic Detection of Aliphatic Alcohol Vapors with Surface-Mounted HKUST-1 MOFs as Sensing Media †",

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.",

keywords = "aliphatic alcohol vapor detection, broadband dielectric microwave spectroscopy, HKUST-1 metal–organic framework (MOF) sensing material, TCNQ-HKUST-1 SURMOF, thin film sensing material, VOC detection",

author = "Amoah, {Papa K.} and Hassan, {Zeinab Mohammed} and Franklin, {Rhonda R.} and Helmut Baumgart and Engelbert Redel and Obeng, {Yaw S.}",

note = "Funding Information: E.R. acknowledges financial support by the Deutsche Forschungsgemeinschaft (DFG) within the Priority Program COORNET (Grant No. SPP 1928). P.K.A. and H.B. acknowledge financial help from Old Dominion University. Publisher Copyright: {\textcopyright} 2022 by the authors.",

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doi = "10.3390/chemosensors10100408",

language = "English (US)",

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AU - Amoah, Papa K.

AU - Hassan, Zeinab Mohammed

AU - Franklin, Rhonda R.

AU - Baumgart, Helmut

AU - Redel, Engelbert

AU - Obeng, Yaw S.

N1 - Funding Information: E.R. acknowledges financial support by the Deutsche Forschungsgemeinschaft (DFG) within the Priority Program COORNET (Grant No. SPP 1928). P.K.A. and H.B. acknowledge financial help from Old Dominion University. Publisher Copyright: © 2022 by the authors.

PY - 2022/10

Y1 - 2022/10

N2 - 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.

AB - 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.

KW - aliphatic alcohol vapor detection

KW - broadband dielectric microwave spectroscopy

KW - HKUST-1 metal–organic framework (MOF) sensing material

KW - TCNQ-HKUST-1 SURMOF, thin film sensing material

KW - VOC detection

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Broadband Dielectric Spectroscopic Detection of Aliphatic Alcohol Vapors with Surface-Mounted HKUST-1 MOFs as Sensing Media †

Abstract

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