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Aggregation-induced emission luminogens and tunable multicolor polymer networks modulated by dynamic covalent chemistry

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Chinese Chemical Letters 2022年第6期33卷 3267-3271页

作者： Shilong Qin Hanxun Zou Yu Hai Lei You College of Chemical Engineering Fuzhou UniversityFuzhou 350116China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Aggregation-induced emission(AIE) based luminescent materials are generating intensive interest due to their unique fluorescence in the aggregation state. Herein we report a strategy of dynamic covalent chemistry(DCC) controlled AIE luminogens for the regulation of multicolor emission in reversible covalent polymer networks. Tetraphenylethene derived ring-chain tautomers were prepared, and the emission was readily controlled through multimode, such as changing the solvent, adding the base, and dynamic covalent reactions with amines. Moreover, the construction of dynamic covalent cross-linked luminescent hydrogels with tunable fluorescent, self-healing, and mechanical properties, was realized. The combination of AIE and aggregation-caused quenching(ACQ) fluorophores in the polymer network further enabled the realization of a multicolor modulator, including white emission, in both solution and gel states. The strategies and results presented should find utility in dynamic assemblies, polymer networks, chemical sensing, and responsive materials.

关键词： Aggregation-induced emission Dynamic covalent chemistry Stimuli-responsive materials Covalent polymer network multicolor emission

multicolor upconversion reversible modulations in YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) photochromic materials

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Journal of Rare Earths 2024年第2期42卷 270-277,I0002页

作者： Zhen Zhang Peng Li Ziyi Xu Zhihao Zhang Qiwei Zhang Haiqin Sun Xihong Hao Inner Mongolia Key Laboratory of Ferroelectric-related New Energy Materials and Devices Schoolof Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou014010China College of Physics and Technology Guangxi Normal UniversityGuilin541004China

Photochromic materials with multicolor upconversion reversible modulations are attractive in optical switching ***,the fabricated YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) materials exhibit excellent photochromism and multicolor upconversion properties from green,red to near infrared(NIR) emissions with increasing Yb *** multiband upconversion modulations are achieved by alternating light(365 and 405 nm) or thermal *** 365 nm irradiation,the luminescence color changes from yellow to red,the luminescent photoswitching contrast reaches up to 86.21%(green),82.12%(red) and 77.38%(NIR) in the Y_(0.83)Er_(0.01)Tm_(0.01)NbO_(4):0.15 Yb ***,the upconversion emission intensity before and after photochromic reaction shows remarkable change in a wide temperature range of 298-718 *** results indicate that the Er^(3+)/Tm^(3+)/Yb^(3+) tri-doped YNbO_(4) materials can be a good candidate in optical switching and data storage applications.

关键词： Photochromic materials Luminescence modulation multicolor emission Photoswitching contrast Rare earths

Sandwich-like QDs/MOFs films for selective sensing and multicolor emitting

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Chinese Chemical Letters 2022年第8期33卷 4013-4016页

作者： Ruding Zhang Shuiying Gao Rong Cao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterThe Chinese Academy of SciencesFuzhou 350002China University of the Chinese Academy of Sciences Beijing 100049China

A novel type sandwich-like composite films composed of ZIF-8 and CdTe QDs were successfully constructed through facile layer-by-layer assembly strategy and their potential applications were also *** on the limitation effects of the aperture of ZIF-8,CdTe QDs/ZIF-8 fluorescent composite films exhibit obvious selective optical response toward hydrogen peroxide and folic ***,tunable colorful light emission composite films in the red-green region are obtained through incorporating two different sized QDs and ZIF-8 films into one composite films.

关键词： CdTe QDs ZIF-8 films QDs/MOFs luminescent composite films Selective sensing multicolor emission

Circularly polarized luminescence of chiral AIE-active BODIPY derivatives with tunable optical property

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Circularly polarized luminescence of chiral AIE-active BODIP...

Regulation of Polymorphic emissions of a U-Shaped DiplatinumComplex in Solution and Crystalline States with Different Intra-and Intermolecular PtPt and π-π Interactions

中国化学会第八届全国分子手性学术研讨会

作者： Hai-Tao Feng Ben Zhong Tang Department of Chemistry The Hong Kong University of Science and Technology

All the known life-forms show specific chirality at molecular scale and macroscopic *** example,nature uses amino acids,saccharides and nucleobases as building blocks to create varied biological *** investigation of chiral phenomenon and the potential applications of chiral materials thus can help us better understand our life processes.[1] To date,many chiral molecules have been built from chiral units to imitate the biological ***,two chiral TPE-BINOL with aggregation-induced emission characteristic,[2] composed of a tetraphenylethylene（TPE） core bearing difluoroboradiazaindacene（BODIPY） and BINOL unit,were *** introducing R/S-BINOL and BODIPY into TPE derivatives,not only endow TPE-BINOL with the properties of aggregation induced circular dichroism enhancement（ACDE） and circular polarized luminescence（CPL）,but also afford it with tunable optical properties.

关键词： Aggregation-induced emission Chirality Circularly polarized luminescence multicolor emission

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Regulation of Polymorphic Emissions of a U-Shaped Diplatinum...