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Synthesis of dual emitting iodocuprates: can solvents switch the reaction outcome?

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Abstract

A remarkable effect of solvents on the reaction outcome has been discovered in the synthesis of halocuprates, as exemplified by the reaction of CuI with 1-methyl-2-methylthiopyridinium iodide, (Me–PySMe)I. When performed in acetonitrile, the reaction results in the selective self-assembly of iodocuprate (Me–PySMe)n[Cu2I3]n (1) featuring 1D double-stranded [Cu2I3]n ribbons. Surprisingly, upon exploiting acetone as a medium under other conditions being similar, isomeric 1D iodocuprate 2 containing one-stranded [Cu2I3]n chains is quantitatively formed. Iodocuprate 1 displays outstanding dual luminescence expressed by two emission bands at λmax = 680 and 550 nm, probably originating from the excited states of the cluster-centered (3CC) type and iodocuprate-to-cation charge transfer one, respectively. The resulting emission color of 1, being defined by the ratio of these bands, reversibly varies as a function of temperature spanning from deep-red (300 K) to yellow (77 K). Isomer 2, being also dual emissive, does not exhibit prominent thermochromic luminescence.

Graphical abstract: Synthesis of dual emitting iodocuprates: can solvents switch the reaction outcome?

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Article information


Submitted
23 Mar 2020
Accepted
23 Apr 2020
First published
24 Apr 2020

Inorg. Chem. Front., 2020, Advance Article
Article type
Research Article

Synthesis of dual emitting iodocuprates: can solvents switch the reaction outcome?

A. V. Artem'ev, A. S. Berezin, I. V. Taidakov and I. Yu. Bagryanskaya, Inorg. Chem. Front., 2020, Advance Article , DOI: 10.1039/D0QI00346H

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