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Issue 16, 2019
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Near-infrared aggregation-induced enhanced electrochemiluminescence from tetraphenylethylene nanocrystals: a new generation of ECL emitters

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Abstract

Herein, we observed near-infrared electrochemiluminescence (NIR ECL) emission from tetraphenylethylene nanocrystals (TPE NCs), which exhibit high ECL efficiency and excellent biocompatibility compared with the current NIR ECL emitters (such as semiconductor quantum dots and metal nanoclusters). The strong ECL signal of TPE NCs originates from the aggregation-induced enhanced ECL emission via improvement of the efficiency of electron hole recombination and suppression of the nonradiative transition. Impressively, the TPE NCs exhibit an enormous red-shifted ECL emission (678 nm) relative to the blue-light photoluminescence (PL) emission (440 nm). Compared to fluorescence imaging which is limited by photobleaching and autofluorescence, the NIR ECL emission of TPE NCs is highly favorable to diminish background interference over visible light and realize deeper tissue penetration, which expands the ECL emission of organic nanomaterials to the NIR region for broader biological applications.

Graphical abstract: Near-infrared aggregation-induced enhanced electrochemiluminescence from tetraphenylethylene nanocrystals: a new generation of ECL emitters

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The article was received on 07 Jan 2019, accepted on 11 Mar 2019 and first published on 15 Mar 2019


Article type: Edge Article
DOI: 10.1039/C9SC00084D
Citation: Chem. Sci., 2019,10, 4497-4501
  • Open access: Creative Commons BY-NC license
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    Near-infrared aggregation-induced enhanced electrochemiluminescence from tetraphenylethylene nanocrystals: a new generation of ECL emitters

    J. Liu, J. Zhang, Z. Tang, Y. Zhuo, Y. Chai and R. Yuan, Chem. Sci., 2019, 10, 4497
    DOI: 10.1039/C9SC00084D

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