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Recent progress of mechanofluorochromism and mechanoluminescence for phenothiazine derivatives and analogues.
Chemistry
January 2025
Qinghai University, College of Chemistry, CHINA.
Mechanofluorochromism (MFC) and mechanoluminescence (ML) materials have garnered significant attention from researchers due to their potential applications in anti-counterfeiting, optical recording, photodynamic therapy, bioimaging, stress sensing, display technology, and ink-free printing paper. Among the various building blocks utilized in these materials, phenothiazine (PTZ) has emerged as a widely employed fundamental component owing to its distinctive electronic and optical properties as well as its facile modification capabilities. Summarizing the recent progress of PTZ derivatives and analogues in this field holds practical significance.
View Article and Find Full Text PDFDisturbance-Triggered Instant Crystallization Activating Bioinspired Emissive Gels.
Angew Chem Int Ed Engl
January 2025
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Key Laboratory of Advanced Marine Materials, 1219 Zhongguan West Road, 315201, Ningbo, CHINA.
Many marine organisms feature sensitive sensory-perceptual systems to sense the surrounding environment and respond to disturbance with intense bioluminescence. However, it remains a great challenge to develop artificial materials that can sense external disturbance and simultaneously activate intense luminescence, although such materials are attractive for visual sensing and intelligent displays. Herein, we present a new class of bioinspired smart gels constructed by integrating hydrophilic polymeric networks, metastable supersaturated salt and fluorophores containing heterogenic atoms.
View Article and Find Full Text PDFSolvothermal Template-Induced Hierarchical Porosity in Covalent Organic Frameworks: A Pathway to Enhanced Diffusivity.
Adv Mater
January 2025
Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany.
The rapid advancement of covalent organic frameworks (COFs) in recent years has firmly established them as a new class of molecularly precise and highly tuneable porous materials. However, compared to other porous materials, such as zeolites and metal-organic frameworks, the successful integration of hierarchical porosity into COFs remains largely unexplored. The challenge lies in identifying appropriate synthetic methods to introduce secondary pores without compromising the intrinsic structural porosity of COFs.
View Article and Find Full Text PDFA supramolecular assembly of a novel green fluorescent protein chromophore-based analogue and its application in fluorescence anti-counterfeiting.
J Mater Chem B
January 2025
The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors, Shanghai Frontiers Science Research Base of Biomimetic Catalysis, Department of Chemistry, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China.
Supramolecular fluorescent materials with switchable behavior and induced luminescence enhancement are a new class of special materials for constructing fluorescence anti-counterfeiting materials. Since these materials are constructed by self-assembly through supramolecular host-guest interactions of non-covalent bonds, such fluorescent materials can regulate their optical properties through a reversible assembly-disassembly process. Inspired by the role of the β-barrel scaffold in activating strong fluorescence of a green fluorescent protein (GFP) chromophore, we designed a supramolecular system based on a novel GFP analogue (CA) and cucurbit[7]uril (CB[7]).
View Article and Find Full Text PDFExcitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal.
Light Sci Appl
January 2025
Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong SAR, China.
Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to the zero-dimensional nature of the crystal lattice that minimizes energy crosstalk, different excitonic states in the crystals can be selectively excited by ultraviolet light, X-ray irradiation, and mechanical action, enabling dynamic control of steady/transient-state spectral features by modulating the excitation modes.
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