TY - JOUR
T1 - Deactivation of the ruthenium excited state by enhanced homogeneous charge transport
T2 - Implications for electrochemiluminescent thin film sensors
AU - O'Reilly, Emmet J.
AU - Keyes, Tia E.
AU - Forster, Robert J.
AU - Dennany, Lynn
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/1
Y1 - 2018/1
N2 - The electrochemiluminescent (ECL) performance of three ruthenium-based metallopolymer platforms with different homogeneous charge transfer diffusion coefficients (DCT) is reported. Significantly, simultaneous detection of light and current in tandem with steady-state photoluminescence studies demonstrate that increasing the rate of Ru3 + production via enhanced charge transport results in a decrease in ECL intensity of up to 82% when the concentration of the co-reactant, sodium oxalate, is low, i.e., sub-mM. Spectroelectrochemical studies demonstrate that for maximum sensitivity to be obtained, the electroactive properties of the polymeric support matrix need to be considered in tandem with luminophore, analyte and co-reactant concentrations.
AB - The electrochemiluminescent (ECL) performance of three ruthenium-based metallopolymer platforms with different homogeneous charge transfer diffusion coefficients (DCT) is reported. Significantly, simultaneous detection of light and current in tandem with steady-state photoluminescence studies demonstrate that increasing the rate of Ru3 + production via enhanced charge transport results in a decrease in ECL intensity of up to 82% when the concentration of the co-reactant, sodium oxalate, is low, i.e., sub-mM. Spectroelectrochemical studies demonstrate that for maximum sensitivity to be obtained, the electroactive properties of the polymeric support matrix need to be considered in tandem with luminophore, analyte and co-reactant concentrations.
KW - Chemiluminescence
KW - ECL sensor design
KW - Electroactive polymers
KW - Electrochemiluminescence
KW - Quenching
KW - [Ru(bpy)]
UR - http://www.scopus.com/inward/record.url?scp=85035760499&partnerID=8YFLogxK
U2 - 10.1016/j.elecom.2017.11.020
DO - 10.1016/j.elecom.2017.11.020
M3 - Article
AN - SCOPUS:85035760499
SN - 1388-2481
VL - 86
SP - 90
EP - 93
JO - Electrochemistry Communications
JF - Electrochemistry Communications
ER -