Air-Tight Three-Electrode Design of Coaxial Electrochemical-EPR Cell for Redox Studies at Low Temperatures

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Title:Air-Tight Three-Electrode Design of Coaxial Electrochemical-EPR Cell for Redox Studies at Low Temperatures
Creators:
Hartl, František
Groenestein, Ronald P.
Mahabiersing, Taasje
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 66, 1, pp. 52-66
Uncontrolled Keywords:Fulvene, Rhenium complex, Alkyl ligand, Low temperature, Electron paramagnetic resonance, 1,2-Dithiine, Electrochemistry

Abstract

The weak point of the original Allendoerfer electrochemical-EPR cell has been the reference electrode, placed outside the space-limited electrolysis cavity or not used at all in experiments at low temperatures. We present here an elegant solution to this problem, based on a modified air-tight design of an Allendoerfer cell equipped with a silver-wire pseudoreference electrode. The cell performance is demonstrated on one-electron electrochemical oxidation of heterocyclic 3,6-diphenyl-1,2-dithiine and one-electron reduction of 6-methyl-6-phenylfulvene and the pseudo-octahedral complex <i>fac</i>-[Re(benzyl)(CO)<sub>3</sub>(dmb)] (dmb = 4,4'-dimethyl-2,2'-bipyridine). In the latter case, the EPR spectrum of the radical anion [Re(benzyl)(CO)<sub>3</sub>(dmb)]<sup>•-</sup> points to predominant localization of the unpaired electron on the dmb ligand, in agreement with UV-VIS and IR spectroelectrochemical data. <p>

Title:Air-Tight Three-Electrode Design of Coaxial Electrochemical-EPR Cell for Redox Studies at Low Temperatures
Creators:
Hartl, František
Groenestein, Ronald P.
Mahabiersing, Taasje
Uncontrolled Keywords:Fulvene, Rhenium complex, Alkyl ligand, Low temperature, Electron paramagnetic resonance, 1,2-Dithiine, Electrochemistry
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:66
Number:1
Page Range:pp. 52-66
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20010052UNSPECIFIED
ID Code:1774
Item Type:Article
Deposited On:06 Feb 2009 17:12
Last Modified:06 Feb 2009 16:12

Citation

Hartl, František; Groenestein, Ronald P.; Mahabiersing, Taasje (2001) Air-Tight Three-Electrode Design of Coaxial Electrochemical-EPR Cell for Redox Studies at Low Temperatures. Collection of Czechoslovak Chemical Communications, 66 (1). pp. 52-66. ISSN 0010-0765

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