Co-assembly of chiral copper(I) complexes and achiral polymer for enhanced circularly polarized luminescence

IF 10.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Science China Chemistry Pub Date : 2024-10-29 DOI:10.1007/s11426-024-2238-8

Ting Liu, Muxin Yu, Yangxingyu Ye, Yunfang Zhao, Zhijia Li, Zhiyuan Wu, Feilong Jiang, Lian Chen, Maochun Hong

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引用次数: 0

Abstract

Circularly polarized luminescence (CPL) has attracted growing attention for their promising applications in chiral functional devices. Achieving CPL materials with both high luminescence dissymmetry factors (g_lum) and emission efficiency is attractive but remains great challenges. In this study, a pair of chiral Cu(I) complexes named R/S-CuI with C₂ symmetry were synthesized, exhibiting no emission in solution and weak CPL with g_lum = ± 3.3×10⁻³ in crystalline state. Transparent chiral films (R/S-CuI-film) were developed through the co-assembly of R/S-CuI and achiral polymer PMMA. The films show bright green luminescence with the quantum yields about 200 times higher than those in crystalline state. Meanwhile, the maximum |g_lum| value is also amplified by approximately 2.5 times, reaching to 8.7×10⁻³. Mechanism investigation suggests that the notable enhancement of luminescence efficiency can be ascribed to the restriction of the intramolecular motions and the elimination of the oxygen quenching effect, while the improvement in g_lum values may be explained by the chirality transfer from the axially chiral molecule R/S-CuI to the achiral polymer PMMA. Furthermore, R/S-CuI-film were used for advanced information encryption applications based on its CPL characteristics. This work may provide new inspirations for the construction of CPL-active films with high performance, thereby expediting their further development.

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.