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The Mediated Detection of Hydrogen Sulfide in Room Temperature Ionic Liquids
Author(s) -
O'Mahony Aoife M.,
Compton Richard G.
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201000283
Subject(s) - mediator , chemistry , cyclic voltammetry , ionic liquid , adduct , hydrogen sulfide , inorganic chemistry , ionic bonding , sulfide , electrochemistry , organic chemistry , medicinal chemistry , ion , electrode , catalysis , sulfur , medicine
The detection of H 2 S was studied using several mediators in room temperature ionic liquids (RTILs) at a microelectrode. Each mediator was characterised voltammetrically, and H 2 S was added to observe if any mediation took place. A successful mediator was 3,5‐ tert ‐butyl‐obenzoquinone. Cyclic voltammetry was carried out in [C 2 mim][NTf2]. A reductive wave was observed and attributed to the two‐electron reduction of the mediator. No oxidative signal was observed. H 2 S was flowed through the system. Cyclic voltammograms showed a decrease in the reductive wave of the mediator and the onset of an oxidative signal due to the reaction between the mediator and H 2 S to form an adduct. This reaction is reversible and on purging the system with N 2 , the original reductive signal of the mediator was recovered.
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