σ-Hammett parameter: A strategy to enhance both photo- and electro-luminescence features of heteroleptic copper(i) complexes

Michael D. Weber, Marta Viciano-Chumillas*, Donatella Armentano, Joan Cano, Rubén D. Costa

*この研究の対応する著者

研究成果: Article査読

40 被引用数 (Scopus)

抄録

This work studies the effect of the σ-Hammett parameter (σp)-i.e., the σ-donation effect caused by substitution at the para position of a bipyridine ligand (4,4′-R2bipy, where R is MeO, Me, H, NO2)-on both the photo- and electro-luminescence features of a series of heteroleptic copper(i) complexes-i.e., [Cu(N^N)(P^P)]+ where N^N and P^P ligands are R2bipy and Xantphos, respectively. By virtue of a comprehensive photophysical, theoretical, and thin-film lighting device-i.e., light-emitting electrochemical cells (LECs)-investigation, we note a clear relationship between the σp and the photo- and electro-luminescence parameters, such as photoluminescence quantum yields, excited-state lifetimes, and emission maxima, as well as device brightness, stability, and efficacy, respectively. As the most relevant finding, the substitution with the group featuring the most negative σp-i.e., MeO-provides a ca. five-fold enhancement of all of the aforementioned figures-of-merit upon comparison within the series of complexes. As such, this work provides a new guideline for a device optimization through a rational ligand design for heteroleptic copper(i) complexes.

本文言語English
ページ(範囲)6312-6323
ページ数12
ジャーナルDalton Transactions
46
19
DOI
出版ステータスPublished - 2017
外部発表はい

ASJC Scopus subject areas

  • 無機化学

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