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- W2992988406 abstract "The realization of electrochemiluminescence (ECL) detection at the single-molecule level is a longstanding goal of ECL assay that requires a novel ECL probe with significantly enhanced luminescence. Here, the synergistic effect of electrochemiluminescence (ECL) is observed unprecedentedly in a new cyclometalated dinuclear Ir(III) complex [Ir2(dfppy)4(imiphenH)]PF6 (1·PF6, PF6– = hexafluorophosphate) in which two {Ir(dfppy)2}+ units are bridged by an imiphenH– ligand. The ECL intensity from complex 1·PF6 is 4.4 and 28.7 times as high as that of its reference mononuclear complexes 2 and 3·PF6, respectively. Theoretical calculation reveals that the S0 to S1 excitation is a local excitation in 1·PF6 with two electron-coupled Ir(III) centers, which contributes to the enhanced ECL. The synergistic effect of ECL in 1·PF6 can be used to detect microRNA 21 at the single-molecule level (microRNA 21: UAGCUUAUCAGACUGAUGUUGA), with detectable ECL emission from this complex intercalated in DNA/microRNA 21 duplex as low as 90 helix molecules. The finding of the synergistic effect of ECL will not only provide a novel strategy for the modulation of ECL intensity but also enable the detection of microRNA at the single-molecule level." @default.
- W2992988406 created "2019-12-13" @default.
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- W2992988406 date "2019-12-02" @default.
- W2992988406 modified "2023-10-16" @default.
- W2992988406 title "Single-Molecule MicroRNA Electrochemiluminescence Detection Using Cyclometalated Dinuclear Ir(III) Complex with Synergistic Effect" @default.
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- W2992988406 doi "https://doi.org/10.1021/acs.analchem.9b04431" @default.
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