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Electrochemistry in Nanostructered Inorganic Molecular Materials

Published online by Cambridge University Press:  21 March 2011

Mary Elizabeth Williams  and
Joseph T. Hupp
Mary Elizabeth Williams
Affiliation:
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
Joseph T. Hupp
Affiliation:
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
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Abstract

We have previously described the synthesis of a family of molecular ‘squares’ based on octahedral Re(I) coordination of difunctional bridging ligands. The size and chemical composition of the square cavity is highly tunable, and the inorganic cyclophanes are being actively studied in catalytic, separations, and sensing applications. Electrochemical techniques have been primary methods for characterization of the transport properties of thin films of the nanostructured materials. For example, cyclic voltammetry and rotating disk electrode voltammetry experiments have revealed size-selective permeation by redox probes, where the size cutoff is determined by the internal square dimensions. We have more recently begun to employ scanning electrochemical microscopy to spatially image micropatterned electrodes containing these thin film materials, simultaneously allowing us to obtain permeability data and topographical information. This paper describes data obtained by employing porphyrin-based molecular squares that feature chemically tailored cavities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y1.5
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

[1] (a) Slone, R. V.; Hupp, J. T. Inorg. Chem. 36, 5422 (1997).Google Scholar
(b) Belangér, S.; Hupp, J. T. Angew. Chem. Intl. Ed. 38, 2222 (1999).Google Scholar
(c) Belangér, S.; Hupp, J. T.; Stern, C. L.; Slone, R. V.; Watson, D. F.; Carrell, T. G. J. Am. Chem. Soc. 121, 557 (1999).Google Scholar
(c) Belangér, S.; Anderson, B. C.; Hupp, J. T. Proc. - Electrochem. Soc. 98–26, 208 (1999).Google Scholar
(e) Slone, R. V.; Benkstein, K. D.; Belangér, S.; Hupp, J. T.; Guzei, I. A.; Rheingold, A. L. Coord. Chem. Rev. 171, 221 (1998).Google Scholar
(f) Keefe, M. H.; Morris, G. A.; Hupp, J. T. Nguyen, S. T., unpublished studies.Google Scholar
[2] (a) Keefe, M. H.; Slone, R. V.; Hupp, J. T.; Czaplewski, K. F.; Snurr, R. Q.; Stern, C. L. Langmuir 16, 3964 (2000).Google Scholar
(b) Keefe, M. H.; Benkstein, K. D.; Hupp, J. T. Coord. Chem. Rev. 205, 201 (2000).Google Scholar
(c) Merlau, M. L.; Grande, W. J.; Nguyen, S. T.; Hupp, J. T. J. Mol. Cat. A 156, 79 (2000).Google Scholar
[3] Williams, M. E.; Stevenson, K. J.; Massari, A.; Hupp, J. T. Anal. Chem. 72, 3122 (2000).Google Scholar
[4] Belangér, S.; Keefe, M. H.; Welch, J. L.; Hupp, J. T. Coord. Chem. Rev. 190–192, 29 (1999).Google Scholar
[5] (a) Bard, A. J.; Denault, G.; Lee, C.; Mandler, D.; Wipf, D. O. Acc. Chem. Res. 23, 357 (1990).Google Scholar
(b) Bard, A. J.; Fan, R. -R. F.; Mirkin, M. V. In Electroanalytical Chemistry, Bard, A. J., Ed.; Marcel Dekker: New York, 1994, Vol. 18, pp. 243.Google Scholar
[6] Feedback refers to the flux of the redox mediator, where electrode currents observed at the SECM tip electrode are enhanced by the proximity of the tip to the conductive sample surface.Google Scholar
[7] To prepare a sample with three materials on the same micropatterned platform, solutions of the porphyrinic squares were drop-cast onto separate areas. This method does not produce films of uniform thickness, which is apparent in the images by the variations in current for individual 50 micron areas.Google Scholar
[8] Williams, M. E.; Hupp, J. T. submitted to J. Phys. Chem. B (2001).Google Scholar