首页|Understanding AIE and ACQ phenomenon of organometallic iridium(Ⅲ)complexes by simple cationization engineering

Understanding AIE and ACQ phenomenon of organometallic iridium(Ⅲ)complexes by simple cationization engineering

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Understanding the relationship between structure and properties is critical to the development of solid-state luminescence materials with desired characteristics and performance optimization.In this work,we elaborately designed and synthesized a pair of mononuclear iridium(Ⅲ)complexes with similar struc-tures but different degrees of cationization.[Ir2-f][2PF6]with two counterions is obtained by simple N-methylation of the ancillary ligand of[Ir1-f][PF6]which is a classic cationic iridium(Ⅲ)complex.Such a tiny modification results in tremendously different optical properties in dilute solutions and powders.[Ir1-f][PF6]exhibits weak light in solution but enhanced emission in solid-state as well as poly(methyl methacrylate)matrix,indicative of its aggregation-induced emission(AIE)activity.On the sharp con-trary,[Ir2-f][2PF6]is an aggregation-caused quenching(ACQ)emitter showing strong emission in the iso-lated state but nearly nonemissive in aggregation states.Benefiting from the appealing characteristics of mechanochromic luminescence and AIE behavior,[Ir1-f][PF6]has been successfully applied in reversible re-writable data recording and cell imaging.These results might provide deep insights into AIE and ACQ phenomenon of iridium(Ⅲ)complexes and facilitate the development of phosphorescent materials with promising properties.

Aggregation induced-emissionCationic iridium(Ⅲ)complexCounterionMechanochromic luminescenceCell imaging

Weilin Song、Huiting Mao、Ying Gao、Yaxuan Yao、Guo-Gang Shan、Zhongmin Su

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State Key Laboratory of Supramolecular Structure and Materials,Institute of Theoretical Chemistry,College of Chemistry,Jilin University,Changchun 130021,China

College of Life Science,Dalian Minzu University,Dalian 116600,China

Jilin Provincial Key Laboratory of Straw Based Functional Materials,Institute for Interdisciplinary Biomass Functional Materials Studies,Jilin Engineering Normal University,Changchun 130052,China

Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery,Faculty of Chemistry,Northeast Normal University,Changchun 130024,China

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国家自然科学基金国家自然科学基金

2217503351902124

2024

10.1016/j.cclet.2023.108309

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(2)
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