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

Chinese Chemical Letters 2024年第2期35卷 553-557页

作者： Weilin Song Huiting Mao Ying Gao Yaxuan Yao Guo-Gang Shan Zhongmin Su State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun 130021China Jilin Provincial Key Laboratory of Straw Based Functional Materials Institute for Interdisciplinary Biomass Functional Materials StudiesJilin Engineering Normal UniversityChangchun 130052China Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery Faculty of ChemistryNortheast Normal UniversityChangchun 130024China College of Life Science Dalian Minzu UniversityDalian 116600China

Understanding the relationship between structure and properties is critical to the development of solidstate 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 structures but different degrees of cationization. [Ir2-f][2PF_(6)] with two counterions is obtained by simple Nmethylation of the ancillary ligand of [Ir1-f][PF_(6)] 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][PF_(6)] 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 contrary, [Ir2-f][2PF_(6)] is an aggregation-caused quenching(ACQ) emitter showing strong emission in the isolated state but nearly nonemissive in aggregation states. Benefiting from the appealing characteristics of mechanochromic luminescence and AIE behavior, [Ir1-f][PF_(6)] 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.

关键词： aggregation induced-emission Cationic iridium(III)complex Counterion Mechanochromic luminescence Cell imaging

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Rational design of AIE-active biodegradable polycarbonates for high-performance WLED and selective detection of nitroaromatic explosives

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中国化学快报:英文版 2023年第8期34卷 429-433页

作者： Shanshan Huang Enhao Wang Jialin Tong Guo-Gang Shan Shunjie Liu Haitao Feng Chao Qin Xianhong Wang Zhongmin Su National&Local United Engineering Laboratory for Power Batteries Department of ChemistryNortheast Normal UniversityChangchun 130024China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China AIE Research Center Shaanxi Key Laboratory of PhytochemistryCollege of Chemistry and Chemical EngineeringUniversity of Arts and SciencesBaoji 721013China

Luminescent polymers have garnered considerable research attention for their excellent properties and wide range of applications in multi-responsive materials,bioimaging,and photoelectric ***,various modulations of polymer structure are often the main approach to obtaining materials with different luminescent colors and ***,polymers with biodegradability,tunable color,and efficient emission simultaneously remain a ***,we report a feasible strategy to achieve degradable and highly emissive polymers by exquisite combination and interplay of aggregation-induced emission(AIE)unit and environmental-friendly epoxide/CO_(2)copolymerization.A series of polycarbonates P-TEP_(x)CN_(y)(x=0,1,2,4,30,120;y=0,1)were prepared,with emission color changed from blue to yellow by controlling the proportion of two designed AIE-active *** them,Using P-TCN as emitting layer,high performance white light-emitting diode(WLED)device with an external quantum efficiency(EQE)of 26.09%and CIE coordinates of(0.32,0.32)was *** addition,the designed polymers can be used as selective sensors for nitroaromatic compounds in their nanoaggregate states.

关键词： CO_(2)copolymerization Biodegradable polymer aggregation induced-emission Sensor White light-emitting diode

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Rational design of an AIE-active metal-organic framework for highly sensitive and portable sensing nitroaromatic explosives

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Chinese Chemical Letters 2023年第3期34卷 481-485页

作者： Luyao Wang Weichao Chen Weilin Song Jingjing Tian Jing Sun Lili Wen Chunyi Sun Xinlong Wang Zhongmin Su Guo-Gang Shan School of Chemistry and Environmental Engineering and Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry Changchun University of Science and TechnologyChangchun 130022China National&Local United Engineering Laboratory for Power Batteries Department of ChemistryNortheast Normal UniversityChangchun 130024China AIE Research Center Shaanxi Key Laboratory of PhytochemistryCollege of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China

Herein,we report a new metal-organic framework with an AIE ligand (H_(4)TCPP=2,3,5,6-tetra-(4-carboxyphenyl)pyrazine) and Mg^(2+) ions,that is,[Mg_(2)(H_(2)O)_(4)TCPP]·DMF·5CH_(3)CN (Mg-TCPP,TCPP=tetra-(4-carboxyphenyl)pyrazine) for detection of nitroaromatic *** to the coordination effect and restricted intramolecular rotation,Mg-TCPP exhibits bright blue *** a fluorescent sensor,Mg-TCPP exhibits high selectivity and sensitivity for sensing 2,4,6-trinitrophenol (TNP) by quenching behaviors with the Stern-Volmer quenching constant (K_(SV)) of 3.63×10^(5)L/mol and achieves the low limit of detection of 25.6 ppb,which is beyond most of the previously reported fluorescent ***,the portable Mg-TCPP films are prepared and it can be used for rapid and sensitive TNP detection in a variety of environments including organic solvent and aqueous ***,TNP vapor can be detected within 3 min by naked eye and the film could be regenerated under simple solvent cleaning.

关键词： Metal-organic frameworks aggregation induced-emission Nitroaromatic compounds Sensor High sensitivity

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