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Chemoselective mechanochemical route toward a bright TADF-emitting CuI-based coordination polymer

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Abstract

An efficient and chemoselective mechanochemical synthesis of a bright TADF-emitting CuI-based compound is reported. The reaction of 2-(ethylsulfanyl)-6-methylpyridine (L) with CuI under solvent-free conditions or in solution results in a non-emissive complex, [Cu2I2L2] (1) or a 1-D coordination polymer (CP), [Cu3I3L2]n (CP 2), respectively. Meanwhile, the simple manual grinding of the reactants in the presence of a few drops of MeCN for 1–2 min chemoselectively gives the structurally different 1-D CP, [Cu3I3L2]n (CP 3), as a single product isolated in 87% yield. Remarkably, both complex 1 and CP 2 under the mechanochemical conditions easily (1–2 min) undergo polymerization or isomerisation, accordingly, to afford CP 3. The structure of the latter is formed by cuprophilic interaction-free (–Cu–I–)n chains ligated by 2-(ethylsulfanyl)-6-methylpyridines in a μ2-N,S manner. At room temperature, CP 1 exhibits highly efficient blue-green TADF with a short lifetime (4.0 μs) and a high photoluminescence performance (PLQY being 70%).

Graphical abstract: Chemoselective mechanochemical route toward a bright TADF-emitting CuI-based coordination polymer

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Publication details

The article was received on 04 Dec 2018, accepted on 21 Jan 2019 and first published on 22 Jan 2019


Article type: Research Article
DOI: 10.1039/C8QI01302K
Citation: Inorg. Chem. Front., 2019, Advance Article

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    Chemoselective mechanochemical route toward a bright TADF-emitting CuI-based coordination polymer

    A. V. Artem'ev, E. P. Doronina, M. I. Rakhmanova, O. A. Tarasova, I. Yu. Bagryanskaya and N. A. Nedolya, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C8QI01302K

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