Dual mechanoluminescence system comprising a solid-state di-copper(i) complex containing N-heterocyclic carbene ligands

Shigesaburo Ogawa, Haruka Katsuragi, Tsukasa Ikeda, Kazumasa Oshima, Shigeo Satokawa, Yasuomi Yamazaki, Taro Tsubomura

研究成果: Contribution to journalArticle査読

抄録

A simple N-heterocyclic carbene (NHC) ligand linked to a flexible propylene linker allows the formation of “Cu-Cu”- and “2 Cu”-type geometries inside a molecular framework. The incorporation of two Cu(i) ions in close proximity was observed in the Cu-Cu-type geometry but not in the 2 Cu-type geometry. In this study, the ground-state geometries of solid-state di-copper(i) complexes containing NHC ligands with ethyl substituents were modulated by external stimuli. A crystal with the 2 Cu-type geometry was obtained by the mechanical grinding and heating of a crystal with the Cu-Cu-type geometry, as confirmed by the disappearance of the absorption peak attributed to cuprophilic interaction in the diffuse reflection spectrum. The mechanical grinding of both crystals afforded composite states comprising small crystallites of the corresponding crystalline phases and an amorphous domain. This structural transition was accompanied by tribochromism and chronochromism. The results suggest that these di-copper(i) complexes show promise for the development of stimuli-responsive photoluminescent Cu(i) complexes.

本文言語英語
ページ(範囲)8845-8850
ページ数6
ジャーナルDalton Transactions
50
25
DOI
出版ステータス出版済み - 7 7 2021

All Science Journal Classification (ASJC) codes

  • 無機化学

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