Mesoporous thin films of `molecular squares' as sensors for volatile organic compounds

Melinda H. Keefe, Robert V. Slone, Joseph T Hupp, Kenneth F. Czaplewski, Randall Q. Snurr, Charlotte L. Stern

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

Mesoporous thin films of rhenium-based `molecular squares', [Re(CO)3Cl(L)]4 (L = pyrazine, 4,4′-bipyridine), have been utilized as sensors for volatile organic compounds (VOCs). The sensing was conducted using a quartz crystal microbalance with the target compounds present in the gas phase at concentrations ranging from 0.05 to 1 mM. Quartz crystal microbalance studies with these materials allowed for distinction between the following VOCs: (1) small aromatic versus aliphatic molecules of almost identical size and volatility and (2) an array of benzene molecules derivatized with electron donating/withdrawing substituents. The experiments suggest that the mesoporous host materials interact with VOC guest molecules through both van der Waals and weak charge-transfer interactions. In addition, size selectivity is shown by exposure of the molecular squares to cyclic ethers of differing size.

Original languageEnglish
Pages (from-to)3964-3970
Number of pages7
JournalLangmuir
Volume16
Issue number8
DOIs
Publication statusPublished - Apr 18 2000

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Volatile Organic Compounds
volatile organic compounds
Volatile organic compounds
Quartz crystal microbalances
quartz crystals
Thin films
microbalances
Molecules
sensors
Sensors
thin films
Cyclic Ethers
Rhenium
Pyrazines
molecules
volatility
pyrazines
rhenium
Carbon Monoxide
Benzene

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Keefe, M. H., Slone, R. V., Hupp, J. T., Czaplewski, K. F., Snurr, R. Q., & Stern, C. L. (2000). Mesoporous thin films of `molecular squares' as sensors for volatile organic compounds. Langmuir, 16(8), 3964-3970. https://doi.org/10.1021/la991252k

Mesoporous thin films of `molecular squares' as sensors for volatile organic compounds. / Keefe, Melinda H.; Slone, Robert V.; Hupp, Joseph T; Czaplewski, Kenneth F.; Snurr, Randall Q.; Stern, Charlotte L.

In: Langmuir, Vol. 16, No. 8, 18.04.2000, p. 3964-3970.

Research output: Contribution to journalArticle

Keefe, MH, Slone, RV, Hupp, JT, Czaplewski, KF, Snurr, RQ & Stern, CL 2000, 'Mesoporous thin films of `molecular squares' as sensors for volatile organic compounds', Langmuir, vol. 16, no. 8, pp. 3964-3970. https://doi.org/10.1021/la991252k
Keefe, Melinda H. ; Slone, Robert V. ; Hupp, Joseph T ; Czaplewski, Kenneth F. ; Snurr, Randall Q. ; Stern, Charlotte L. / Mesoporous thin films of `molecular squares' as sensors for volatile organic compounds. In: Langmuir. 2000 ; Vol. 16, No. 8. pp. 3964-3970.
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