Efficient Near-Infrared Electrochemiluminescence from Au18 Nanoclusters |
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Authors: | Dr. Mahdi Hesari Prof. Dr. Zhifeng Ding |
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Affiliation: | Department of Chemistry, The University of Western Ontario, 1151 Richmond St., London, ON N6A 5B7 Canada |
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Abstract: | Bright, near-infrared electrochemiluminescence (NIR–ECL) of Au18 nanoclusters is reported herein. Spooling ECL and photoluminescence spectroscopy were used to track and link NIR emissions at 832 and 848 nm to three emissive species, Au180*, Au181+* and Au182+*, with a considerably high ECL efficiency of 5.5 relative to that of the gold standard Ru(bpy)32+/TPrA (with 5–6 % reported ECL efficiency). The unprecedentedly high efficiency is due to the overlapped oxidation potentials of Au180 and tri-n-propylamine as co-reactant, the exposed facets of Au180 gold core, and electrocatalytic loops. These discoveries will add a new member to the efficient NIR-ECL gold nanoclusters family and bring more potential applications. |
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Keywords: | gold nanoclusters nano-electrochemistry near-IR electrochemiluminescence spooling photoluminescence spectroscopy |
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