Electrochemical Behavior of [ReI(DMPE)3]+, Where DMPE = 1,2-Bis(dimethylphosphino)ethane, at Perfluorosulfonated Ionomer-Modified Electrodes
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- 作者：Yingping Deng ; Carl J. Seliskar ; and William R. Heineman
- 刊名：Analytical Chemistry
- 出版年：1997
- 出版时间：October 1, 1997
- 年：1997
- 卷：69
- 期：19
- 页码：4045 - 4050
- 全文大小：218K
- 年卷期：v.69,no.19(October 1, 1997)
- ISSN：1520-6882
文摘
The perfluorosulfonated ionomer Nafion shows potentialutility as a polymer film to enhance the electrochemicaldetection of[ReI(DMPE)3]+, where DMPE= 1,2-bis(dimethylphosphino)ethane.[ReI(DMPE)3]+, anonradioactive radiopharmaceutical analog for heart imaging,partitions strongly into Nafion films on glassy carbon.Well-defined, chemically reversible cyclicvoltammogramsare obtained for the[ReI(DMPE)3]+/[ReII(DMPE)3]2+couple with E
' shifted positively by 60 mV relative toitsvalue on bare glassy carbon.[ReI(DMPE)3]+partitionsinto Nafion more strongly than the oxidized form,[ReII(DMPE)3]2+. The detection limit for[ReI(DMPE)3]+bycyclic voltammetry was improved by 2-3 orders ofmagnitude by the Nafion film. Differential pulsevoltammetry for oxidation of[ReI(DMPE)3]+ at theNafion-modified electrode has a detection limit of 2.5 ×10-9 Mcompared to 1.0 × 10-7 M at the bareelectrode. Apreconcentration factor of 1 × 106 for partitioning of[ReI(DMPE)3]+ from 0.05 M NaCl into Nafion on aglassycarbon electrode was measured.
' shifted positively by 60 mV relative toitsvalue on bare glassy carbon.[ReI(DMPE)3]+partitionsinto Nafion more strongly than the oxidized form,[ReII(DMPE)3]2+. The detection limit for[ReI(DMPE)3]+bycyclic voltammetry was improved by 2-3 orders ofmagnitude by the Nafion film. Differential pulsevoltammetry for oxidation of[ReI(DMPE)3]+ at theNafion-modified electrode has a detection limit of 2.5 ×10-9 Mcompared to 1.0 × 10-7 M at the bareelectrode. Apreconcentration factor of 1 × 106 for partitioning of[ReI(DMPE)3]+ from 0.05 M NaCl into Nafion on aglassycarbon electrode was measured.