A sensor capable of sensing of water in various organic solvents ranging from water-soluble to water-miscible solvents is still a challenging task. In this research, a cyclic polymer fluorescence chemosensor (CPFC) has been developed for sensing of water by turn-on model in 9 organic solvents and turn-off model in DMA, where the broadest concentration range and the lowest detection limit was obtained for water in DMA (10 %-90 %) and dioxane (0.011 %), respectively. The sensing mechanism is explored by theory calculation and experimental investigation. The amphiphilic nature endows the polymer probe with great potential for measuring various contaminants from aqueous and nonaqueous mediums. Furthermore, the present search highlights the potential applications of cyclic polymer as fluorescence probes in the field of sensing.
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http://dx.doi.org/10.1016/j.saa.2024.124554 | DOI Listing |
J Fluoresc
January 2025
Department of Chemistry, Sardar Vallabhbhai National Institute Technology, Surat, Gujarat, 395007, India.
An easy-to-synthesize aggregation-induced emission (AIE) active Schiff base HNSA was obtained by condensing equimolar amount of 3-hydroxy-2-naphthohydrazide and salicylaldehyde. In pure DMSO, HNSA is non-fluorescent, but increasing the HEPES (HO, 10 mM, pH 7.4) fraction (f) ≥ 90% showed an intense green fluorescence with maximum fluorescence intensity at 515 nm.
View Article and Find Full Text PDFMater Horiz
January 2025
Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, China.
The porous polymer is a common and fascinating category within the vast family of porous materials. It offers valuable features such as sufficient raw materials, easy processability, controllable pore structures, and adjustable surface functionality by combining the inherent properties of both porous structures and polymers. These characteristics make it an effective choice for designing functional and advanced materials.
View Article and Find Full Text PDFDalton Trans
January 2025
Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad, 500078, India.
Flexible bis-benzimidazole-based V-shaped amphiphilic probes (1 and 2) that form a fluorescent nanoscopic assembly in aqueous media have been designed. The ion-binding properties of compound 1 are investigated in both polar protic (water) and aprotic (acetonitrile) solvents. In acetonitrile, the compound shows a distinct chromogenic response towards Hg (LOD: 8.
View Article and Find Full Text PDFPurpose: To develop a rapid, high-resolution and distortion-free quantitative $R_{2}^{*}$ mapping technique for fetal brain at 3 T.
Methods: A 2D multi-echo radial FLASH sequence with blip gradients is adapted for fetal brain data acquisition during maternal free breathing at 3 T. A calibrationless model-based reconstruction with sparsity constraints is developed to jointly estimate water, fat, $R_{2}^{*}$ and $B_{0}$ field maps directly from the acquired k-space data.
Inorg Chem
January 2025
International Joint Research Center for Photoresponsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, P. R. China.
Hg is highly toxic and can cause serious harm to the environment and humans. Thus, it is vital to develop efficient Hg sensors. In this work, a LMOF-based (LMOF = luminescent metal-organic framework) "turn-on" Hg sensor () is first developed by an aggregation-induced emission (AIE) functional ligand.
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