Walljet electrochemistry: Quantifying molecular transport through metallopolymeric and zirconium phosphonate assembled porphyrin square thin films

  • Massari A
  • Gurney R
  • Schwartz C
 et al. 
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Abstract

By employing redox-active probes, condensed-phase molecular transport through nanoporous thin films can often be measured electrochemically. Certain kinds of electrode materials (e.g. conductive glass) are difficult to fabricate as rotatable disks or as ultramicroelectrodesthe configurations most often used for electrochemical permeation measurements. These limitations point to the need for a more materials-general measurement method. Herein, we report the application of walljet electrochemistry to the study of molecular transport through model metallopolymeric films on indium tin oxide electrodes. A quantitative expression is presented that describes the transport-limited current at the walljet electrode in terms of mass transport through solution and permeation through the film phase. A comparison of the film permeabilities for a series of redox probes measured using the walljet electrode and a rotating disk electrode establishes the accuracy of the walljet method, while also demonstrating similar preci...

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Authors

  • Aaron M. Massari

  • Richard W. Gurney

  • Craig P. Schwartz

  • Son Binh T. Nguyen

  • Joseph T. Hupp

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