Evidence for superoxide-initiated oxidation of aniline in water by pulsed, atmospheric pressure plasma

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https://doi.org/10.13020/z00b-wa52
https://hdl.handle.net/11299/263172

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Keywords

APPJ

Aniline

Oxidation

Superoxide

Collection period

2022-10-25
2023-03-18

Date completed

2024-06-06

Date updated

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Title

Evidence for superoxide-initiated oxidation of aniline in water by pulsed, atmospheric pressure plasma

Published Date

2024-05-13

Authors

Clay, Collin D

Mueller, Chelsea M

Rich, Christopher

Schatz, George C

Bruggeman, Peter

Frontiera, Renee R

Group

Author Contact

Frontiera, Renee R
rrf@umn.edu

Type

Dataset
Experimental Data

Abstract

Plasma-driven solution electrochemistry (PDSE) uses plasma-generated reactive species to drive redox reactions in solution. Non-thermal, atmospheric pressure plasmas, when irradiating water, produce many redox species. While PDSE is a promising chemical tool, there is limited insight into the mechanisms of the reactions due to the variety of short-lived reagents produced. In this study, we use aniline as a model system for studying redox mechanisms of PDSE. We show that the plasma irradiation of aqueous aniline solutions drives the formation of polyaniline oligomer, which is suppressed under acidic starting conditions. The addition of (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl (TEMPO), a radical scavenger, decreases the formation of oligomer by 80%, and the addition of superoxide dismutase fully hinders oligomerization. These results lead us to conclude that the oligomerization of aniline by plasma irradiation is initiated by superoxide. This discovery provides novel insights into PDSE mechanisms and illustrates a potential method of harnessing superoxide for chemical reactions.

Description

Attached are the raw data files for the Raman spectra of various samples irradiated by atmospheric pressure plasma and the controls. The Igor files are also included that were used to work up the data analysis. All analysis was done using Igor Pro 7.

Referenced by

Clay, Collin D; Mueller, Chelsea M; Rich, Christopher; Schatz, George C; Bruggeman, Peter; Frontiera, Renee R. Superoxide-initiated oxidation of aniline in water by pulsed, atmospheric pressure plasma. (under review)

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CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/

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Data Repository for U of M (DRUM)

Funding information

Army Research Office Grant No. W911NF‐20‐1‐0105

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Previously Published Citation

Suggested citation

Clay, Collin D; Mueller, Chelsea M; Rich, Christopher; Schatz, George C; Bruggeman, Peter; Frontiera, Renee R. (2024). Evidence for superoxide-initiated oxidation of aniline in water by pulsed, atmospheric pressure plasma. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/z00b-wa52.

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