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• W2898678803 endingPage "15915" @default.
• W2898678803 startingPage "15904" @default.
• W2898678803 abstract "Electrochemiluminescence (ECL) is a highly successful technique used in commercial immunoassays for clinical diagnosis. Developing an ECL-based multiplex immunoassay, with the potential to enable high-throughput detection of multiple biomarkers simultaneously, remains a current research interest yet is limited by a narrow choice of ECL luminophores. Herein we report the synthesis, photophysics, electrochemistry, and ECL of several new ruthenium(II) and iridium(III) complexes, three of which are eventually used as signal reporters for multiplex immunoassay. The ECL behaviors of individual luminophores and their mixtures were investigated in multiple modes, including light intensity, spectrum, and image measurements. The spectral peak separation between Ru(bpy)2(dvbpy)2+ (bpy = 2,2'-bipyridine, dvbpy = 4,4'-bis(4-vinylphenyl)-2,2'-bipyridine), and Ir(dFCF3ppy)2(dtbbpy)+ (dFCF3ppy = 3,5-difluoro-2-[5-(trifluoromethyl)-2-pyridinyl]phenyl, dtbbpy = 4,4'-bis( tert-butyl)-2,2'-bipyridine) was up to 145 nm, thus providing the spectrum-resolved possibility of identifying light signals. The potential-resolved ECL signals were achieved for the mixtures of Ir(ppy)3 (ppy = 2-phenylpyridine) with either Ru(bpy)2(dvbpy)2+ or Ir(dFCF3ppy)2(dtbbpy)+, due to the self-annihilation ECL of Ir(ppy)3 at higher potentials, as confirmed by electrochemistry-coupled mass spectrometry. A multiplex immunoassay free of spatial spotting antibodies on plates or substrates was ultimately devised by combining luminophore-loaded polymer beads with the homogeneous sandwich immunoreaction. Using potential and spectrum dual-resolved ECL as the readout signal, simultaneous recognition of three antigens, namely, carcinoembryonic antigen (CEA), alpha-fetoprotein (AFP), and beta-human chorionic gonadotropin (β-HCG), was demonstrated in a single run for a sample volume of 300 μL. These results contribute to the understanding of ECL generation by multiple luminophores and devising spot-free multiplex immunoassays with less sample consumption." @default.
• W2898678803 created "2018-11-09" @default.
• W2898678803 creator A5035374545 @default.
• W2898678803 creator A5047068590 @default.
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• W2898678803 creator A5068368466 @default.
• W2898678803 creator A5071153582 @default.
• W2898678803 creator A5071720101 @default.
• W2898678803 date "2018-10-31" @default.
• W2898678803 modified "2023-10-14" @default.
• W2898678803 title "Potential-Resolved Multicolor Electrochemiluminescence for Multiplex Immunoassay in a Single Sample" @default.
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