Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br)
Abstract The ionic liquid (IL) trihalogen monoanions [N2221][X3]− and [N2221][XY2]− ([N2221]+=triethylmethylammonium, X=Cl, Br, I, Y=Cl, Br) were investigated electrochemically via temperature dependent conductance and cyclic voltammetry (CV) measurements. The polyhalogen monoanions were measured bo...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2021-02-01
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| Series: | ChemistryOpen |
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| Online Access: | https://doi.org/10.1002/open.202000263 |
| _version_ | 1818437600911818752 |
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| author | Tyler A. Gully Patrick Voßnacker Jonas R. Schmid Helmut Beckers Prof. Dr. Sebastian Riedel |
| author_facet | Tyler A. Gully Patrick Voßnacker Jonas R. Schmid Helmut Beckers Prof. Dr. Sebastian Riedel |
| author_sort | Tyler A. Gully |
| collection | DOAJ |
| description | Abstract The ionic liquid (IL) trihalogen monoanions [N2221][X3]− and [N2221][XY2]− ([N2221]+=triethylmethylammonium, X=Cl, Br, I, Y=Cl, Br) were investigated electrochemically via temperature dependent conductance and cyclic voltammetry (CV) measurements. The polyhalogen monoanions were measured both as neat salts and as double salts in 1‐butyl‐1‐methyl‐pyrrolidinium trifluoromethane‐sulfonate ([BMP][OTf], [X3]−/[XY2]− 0.5 M). Lighter IL trihalogen monoanions displayed higher conductivities than their heavier homologues, with [Cl3]− being 1.1 and 3.7 times greater than [Br3]− and [I3]−, respectively. The addition of [BMP][OTf] reduced the conductivity significantly. Within the group of polyhalogen monoanions, the oxidation potential develops in the series [Cl3]−>[BrCl2]−>[Br3]−>[IBr2]−>[ICl2]−>[I3]−. The redox potential of the interhalogen monoanions was found to be primarily determined by the central halogen, I in [ICl2]− and [IBr2]−, and Br in [BrCl2]−. Additionally, tetrafluorobromate(III) ([N2221]+[BrF4]−) was analyzed via CV in MeCN at 0 °C, yielding a single reversible redox process ([BrF2]−/[BrF4]−). |
| first_indexed | 2024-12-14T17:27:15Z |
| format | Article |
| id | doaj.art-abaa31c86d4e40039e598c1b1187c318 |
| institution | Directory Open Access Journal |
| issn | 2191-1363 |
| language | English |
| last_indexed | 2024-12-14T17:27:15Z |
| publishDate | 2021-02-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemistryOpen |
| spelling | doaj.art-abaa31c86d4e40039e598c1b1187c3182022-12-21T22:53:12ZengWiley-VCHChemistryOpen2191-13632021-02-0110225526410.1002/open.202000263Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br)Tyler A. Gully0Patrick Voßnacker1Jonas R. Schmid2Helmut Beckers3Prof. Dr. Sebastian Riedel4Freie Universität Berlin Fachbereich Biologie, Chemie, Pharmazie Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Fachbereich Biologie, Chemie, Pharmazie Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Fachbereich Biologie, Chemie, Pharmazie Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Fachbereich Biologie, Chemie, Pharmazie Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyFreie Universität Berlin Fachbereich Biologie, Chemie, Pharmazie Institut für Chemie und Biochemie – Anorganische Chemie Fabeckstr. 34/36 14195 Berlin GermanyAbstract The ionic liquid (IL) trihalogen monoanions [N2221][X3]− and [N2221][XY2]− ([N2221]+=triethylmethylammonium, X=Cl, Br, I, Y=Cl, Br) were investigated electrochemically via temperature dependent conductance and cyclic voltammetry (CV) measurements. The polyhalogen monoanions were measured both as neat salts and as double salts in 1‐butyl‐1‐methyl‐pyrrolidinium trifluoromethane‐sulfonate ([BMP][OTf], [X3]−/[XY2]− 0.5 M). Lighter IL trihalogen monoanions displayed higher conductivities than their heavier homologues, with [Cl3]− being 1.1 and 3.7 times greater than [Br3]− and [I3]−, respectively. The addition of [BMP][OTf] reduced the conductivity significantly. Within the group of polyhalogen monoanions, the oxidation potential develops in the series [Cl3]−>[BrCl2]−>[Br3]−>[IBr2]−>[ICl2]−>[I3]−. The redox potential of the interhalogen monoanions was found to be primarily determined by the central halogen, I in [ICl2]− and [IBr2]−, and Br in [BrCl2]−. Additionally, tetrafluorobromate(III) ([N2221]+[BrF4]−) was analyzed via CV in MeCN at 0 °C, yielding a single reversible redox process ([BrF2]−/[BrF4]−).https://doi.org/10.1002/open.202000263polyhalogen monoanionscyclic voltammetryionic liquidsconductivittetrafluorobromate |
| spellingShingle | Tyler A. Gully Patrick Voßnacker Jonas R. Schmid Helmut Beckers Prof. Dr. Sebastian Riedel Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br) ChemistryOpen polyhalogen monoanions cyclic voltammetry ionic liquids conductivit tetrafluorobromate |
| title | Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br) |
| title_full | Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br) |
| title_fullStr | Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br) |
| title_full_unstemmed | Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br) |
| title_short | Conductivity and Redox Potentials of Ionic Liquid Trihalogen Monoanions [X3]−, [XY2]−, and [BrF4]− (X=Cl, Br, I and Y=Cl, Br) |
| title_sort | conductivity and redox potentials of ionic liquid trihalogen monoanions x3 xy2 and brf4 x cl br i and y cl br |
| topic | polyhalogen monoanions cyclic voltammetry ionic liquids conductivit tetrafluorobromate |
| url | https://doi.org/10.1002/open.202000263 |
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