1. An Efficient Electrochemiluminescence Enhancement Strategy on Bipolar Electrode for Bioanalysis.
- Author
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Zhang N, Gao H, Xu CH, Cheng Y, Chen HY, and Xu JJ
- Subjects
- Electrodes, Iridium chemistry, Organometallic Compounds chemistry, Propylamines chemistry, Prostate-Specific Antigen chemistry, Electrochemistry instrumentation, Luminescent Measurements, Prostate-Specific Antigen analysis
- Abstract
This paper develops an efficient electrochemiluminescence (ECL) enhancement strategy on closed bipolar electrode for the detection of prostate specific antigen (PSA). We first synthesized a cyclometalated iridium(III) complex (pq)
2 Irbza with high ECL efficiency and used as ECL emitter in the anodic cell of BPE. While we introduced a Pt-tipped Au NRs and constructed a sandwich immune structure at the cathodic pole of BPE. Combined the signal amplification strategies of enzyme catalysis and the synergistic catalytic effect of bimetallic structure for the reduction of H2 O2 , the attached Pt-tipped Au NRs-GOx-Ab2 nanocomplex as both recognition probes and signal amplification units could mediate the ECL signals of (pq)2 Irbza/tripropylamine (TPrA) on the anodes of BPE through faradaic reaction due to the charge neutrality of BPE. Therefore, a highly sensitive BPE-ECL sensor for detection of PSA with a detection limit of 0.72 pg/mL and a linear range from 1.0 pg/mL to 10 ng/mL was obtained. This work is expected to broaden the application of iridium complex and bimetallic nanocatalyst in biological detection and could be utilized to detect many other biological molecules.- Published
- 2019
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