Absorbance-based spectroelectrochemical sensor for [Re(dmpe)3]+ (dmpe = dimethylphosphinoethane)
A spectroelectrochemical sensor was developed for [Re(dmpe)3]+ as a non radioactive analog for [Tc(dmpe)3]+. The sensor consists of an optically transparent electrode (OTE) coated with a thin film of sulfonated polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SSEBS). Colorless [Re(dmpe)3]+ was reversibly oxidized to [Re(dmpe)3]2+ (λmax = 530 nm). [Re(dmpe)3]+ preconcentrated by ion-exchange into the SSEBS film, resulting in a 20-fold increase in peak current compared to a bare OTE after 1 h of exposure to aqueous [Re(dmpe)3]+ solution. Detection of [Re(dmpe)3]+ at concentrations down to 2 x 10 6 M was accomplished by electrochemical modulation of the complex and monitoring absorbance by attenuated total reflectance (ATR).
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 970361
- Report Number(s):
- PNNL-SA-66257; KP1504010; TRN: US201003%%524
- Journal Information:
- Electroanalysis, 21(19):2091-2098, Vol. 21, Issue 19
- Country of Publication:
- United States
- Language:
- English
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