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Fluorescent Polymers via Coordination of -Terpyridine Ligands with Transition Metals and Their pH Response Properties.
Polymers (Basel)
December 2024
Department of Organic and Polymer Chemistry, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
Stimulus-responsive luminescent materials are pivotal in the field of sensing. Fluorescent transition metal complexes with a charge transfer excited state, especially terpyridine-coordinated polymers, are of particular interest due to their tunable emission. In this paper, a novel bis-terpyridine ligand was synthesized and assembled into a coordination polymer, which showed intense visible light absorption and fluorescence emission in the solid state that could be regulated by an acidic or basic pH.
View Article and Find Full Text PDFRegulation of TADF by Internal and External Heavy Atom Effect in D-A MOF for Heterocrystal based Temperature-Compensated Photonic Device.
Angew Chem Int Ed Engl
January 2025
Nankai University, School of Materials Science and Engineering, CHINA.
The application of temperature-compensated photonic device is hampered by poor accuracy and overly simplistic functions of propagation in photonic integrated circuits (PICs) field. Herein, we report a new library of donor-acceptor metal-organic framework (D-A MOF) with thermally activated delayed fluorescence (TADF) and the fabricating of temperature-compensated photonic device by virtue of the unique temperature response character of TADF emitters. Highly tunable through-space charge transfer (TSCT) of TADF was realized within the D-A MOFs through a novel strategy that synergistically combines the internal heavy atom effect (HAE) with an external HAE, induced by the incorporation of heavy atoms into different components, achieving the regulable photophysical indicators including adjustable PL wavelength (534 to 592 nm) and surging quantum yield (5.
View Article and Find Full Text PDFNano structural regulation of lignin and evaluation of its ultraviolet light absorption properties through quantum chemistry calculations.
Int J Biol Macromol
January 2025
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
Lignin, a biomass-derived material containing chromophores, possesses the potential to serve as a versatile organic ultraviolet (UV) light screening agent. By employing quantum chemical computation techniques, an amphoteric deep eutectic solvent (DES) based on sulfamic acid was purposefully designed and engineered to create a solvent system tailored for the nanoparticle formation and functionalization of lignin. As confirmed by experimental evidence, the size of the modified lignin nanoparticles (LNPs) varies from 168.
View Article and Find Full Text PDFInvestigation of the Ocular Response and Corneal Damage Threshold of Exposure to 28 GHz Quasi-millimeter Wave Exposure.
Health Phys
January 2025
Division of Vision Research for Environmental Health, Medical Research Institute and Department of Ophthalmology, Kanazawa Medical University, Kahoku, Japan.
Electromagnetic radiation energy at millimeter wave frequencies, typically 30 GHz to 300 GHz, is ubiquitously used in society in devices for telecommunications; radar and imaging systems for vehicle collision avoidance, security screening, and medical equipment; scientific research tools for spectroscopy; industrial applications for non-destructive testing and precise measurement; and military and defense applications. Understanding the biological effects of this technology is essential. We have been investigating ocular responses and damage thresholds comparing various frequencies using rabbit eyes and dedicated experimental apparatus.
View Article and Find Full Text PDFA cross-scale transfer learning framework: prediction of SOD activity from leaf microstructure to macroscopic hyperspectral imaging.
Plant Biotechnol J
January 2025
School of Wine & Horticulture, Ningxia University, Yinchuan, Ningxia, China.
Superoxide dismutase (SOD) plays an important role to respond in the defence against damage when tomato leaves are under different types of adversity stresses. This work employed microhyperspectral imaging (MHSI) and visible near-infrared (Vis-NIR) hyperspectral imaging (HSI) technologies to predict tomato leaf SOD activity. The macroscopic model of SOD activity in tomato leaves was constructed using the convolutional neural network in conjunction with the long and short-term temporal memory (CNN-LSTM) technique.
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