Electrochemistry in ionic liquids: Case study of a manganese corrole
- Authors: McNicholas B.J.1, Blumenfeld C.1, Kramer W.W.1, Grubbs R.H.1, Winkler J.R.1, Gray H.B.1
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Affiliations:
- Beckman Institute, and Division of Chemistry and Chemical Engineering
- Issue: Vol 53, No 10 (2017)
- Pages: 1189-1193
- Section: Section 3. Electron Transfer Kinetics and Electrochemical Processes
- URL: https://journals.rcsi.science/1023-1935/article/view/189097
- DOI: https://doi.org/10.1134/S1023193517100068
- ID: 189097
Cite item
Abstract
Voltammetry of [5,10,15-tris(pentafluorophenylcorrole)]Mn(III) was investigated in four different ionic liquids (ILs): 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIm-TFSI); 1-ethyl-3-methylimidazolium ethylsulfate (EMIm-EtOSO3); 1-ethyl-3-methylimidazolium triflate (EMIm-OTf); and 1-ethyl-3-methylimidazolium tetracyanoborate (EMIm-TCB). We found that MnIV/III E1/2 values depend on IL counter anion: OTf–< EtOSO3− < TFSI− < TCB−. In EMIm-TCB and BMIm- TFSI, reversible, diffusion-controlled MnIV/III reactions occurred, as evidenced in each case by the ratio of anodic to cathodic diffusion coefficients over a range of scan rates. Axial coordination was evidenced by a cathodic to anodic diffusion coefficient ratio greater than one, an increasing cathodic to anodic peak current ratio with increasing scan rate, and a split Soret band in the UV-vis spectrum of the complex.
About the authors
Brendon J. McNicholas
Beckman Institute, and Division of Chemistry and Chemical Engineering
Email: winklerj@caltech.edu
United States, 1200 East California Boulevard, Mail Code 139-74, Pasadena, California, 91125
Carl Blumenfeld
Beckman Institute, and Division of Chemistry and Chemical Engineering
Email: winklerj@caltech.edu
United States, 1200 East California Boulevard, Mail Code 139-74, Pasadena, California, 91125
Wesley W. Kramer
Beckman Institute, and Division of Chemistry and Chemical Engineering
Email: winklerj@caltech.edu
United States, 1200 East California Boulevard, Mail Code 139-74, Pasadena, California, 91125
Robert H. Grubbs
Beckman Institute, and Division of Chemistry and Chemical Engineering
Email: winklerj@caltech.edu
United States, 1200 East California Boulevard, Mail Code 139-74, Pasadena, California, 91125
Jay R. Winkler
Beckman Institute, and Division of Chemistry and Chemical Engineering
Author for correspondence.
Email: winklerj@caltech.edu
United States, 1200 East California Boulevard, Mail Code 139-74, Pasadena, California, 91125
Harry B. Gray
Beckman Institute, and Division of Chemistry and Chemical Engineering
Email: winklerj@caltech.edu
United States, 1200 East California Boulevard, Mail Code 139-74, Pasadena, California, 91125