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Diffusion of Carbon Monoxide in Metalorganic thin Films Derived from Titanium Alkoxide Carboxylates

Published online by Cambridge University Press:  25 February 2011

Charles D. Gagliardi ,
Dilum Dunuwila ,
C. K. Chang  and
Kris A. Berglund
Charles D. Gagliardi
Affiliation:
Michigan State University, Department of Chemical Engineering, East Lansing, MI 48824.
Dilum Dunuwila
Affiliation:
Michigan State University, Department of Chemical Engineering, East Lansing, MI 48824.
C. K. Chang
Affiliation:
Michigan State University, Department of Chemistry, East Lansing, MI 48824.
Kris A. Berglund
Affiliation:
Michigan State University, Department of Chemical Engineering, East Lansing, MI 48824. Michigan State University, Department of Agricultural Engineering, East Lansing, MI 48824.
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Abstract

The diffusion of carbon monoxide into thin, transparent, porous film media is studied by doping the film with an iron porphyrin and spectroscopically monitoring the chemical interaction between the reduced iron porphyrin and the diffusing solute. The films are spin-cast from metal alkoxide carboxylates. Both optical absorption and resonance Raman spectroscopies have been used to study the porphyrin-doped film and the diffusion process.

The studies yield information on the effective pore size and homogeneity of the materials, and show that redox chemistry can be performed on incorporated metallo-porphyrins. This investigation also demonstrates the usefulness of porphyrin-doped films as chemical sensors, showing a sensitivity below 70 ppb to aqueous carbon monoxide.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 645
Copyright
Copyright © Materials Research Society 1992

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References

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