Luminescence-Based Spectroelectrochemical Sensor for [Tc(dmpe)3]2+/+ (dmpe = 1,2-bis(dimethylphosphino)ethane) within a Charge-Selective Polymer Film

Journal Article · Tue Mar 01 04:00:00 EST 2011 · Analytical Chemistry, 83(5):1766-1722

DOI:https://doi.org/10.1021/ac1030368· OSTI ID:1009709

Chatterjee, Sayandev; Del Negro, Andrew S; Edwards, Matthew K; Bryan, Samuel A; Kaval, Necati; Pantelic, Nebojsa; Morris, Laura K; Heineman, W R; Seliskar, Carl J

A spectroelectrochemical sensor consisting of an indium tin oxide (ITO) optically transparent electrode (OTE) coated with a thin film of sulfonated polystyrene-blockpoly(ethylene-ran-butylene)-block-polystyrene (SSEBS) was developed for [Tc(dmpe)3]+.. [Tc(dmpe)3]+ preconcentrated by ion-exchange into the SSEBS film after 20 min exposure to aqueous [Tc(dmpe)3]+ solution, resulting in a 14-fold increase in cathodic peak current compared to a bare OTE. Colorless [Tc(dmpe)3]+ was reversibly oxidized to colored [Tc(dmpe)3]2+ by cyclic voltammetry. Detection of [Tc(dmpe)3]2+ was accomplished by electrochemically cycling the complex between non-emissive [Tc(dmpe)3]+ and emissive [Tc(dmpe)3]2+ and monitoring the modulated emission (λexc = 532 nm; λem = 660 nm). The sensor gave a linear response over the range of 0.16 to 340.0 µM.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1009709
• Report Number(s): PNNL-SA-76227; 39193; 38994; KP1504010
• Journal Information: Analytical Chemistry, 83(5):1766-1722, Journal Name: Analytical Chemistry, 83(5):1766-1722 Journal Issue: 5 Vol. 83
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
DETECTION
ELECTRODES
Environmental Molecular Sciences Laboratory
INDIUM
ION EXCHANGE
MONITORING
POLYMERS
THIN FILMS
TIN OXIDES
sensor
optical
technetium
optically transparent electrode
emission detection