Novel room temperature magnetic chiral ionic liquids derived from amino acids were synthesized and their magnetic properties as well as chiral discrimination abilities were investigated.
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http://dx.doi.org/10.1039/b917683g | DOI Listing |
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December 2024
School of Chemistry, GDMPA Key Laboratory for Process Control and Quality Evaluation of Chiral Pharmaceuticals, South China Normal University, Guangzhou, 510006, China.
Green and efficient total antioxidant capacity (TAC) detection is significant for healthy diet and disease prevention. This work first proposed the concept of TAC colorimetric detection based on microrobots. A novel metal-organic framework (MOF)-based biomimetic enzyme microrobot (MIL-88A@FeO) is developed that can efficiently and accurately detect the TAC of real fruits and vegetables.
View Article and Find Full Text PDFNano Lett
December 2024
Instituto de Química Física Blas Cabrera (IQF), CSIC, 28006 Madrid, Spain.
We investigate the emergence of self-hybridized thermal magnetoplasmons in doped graphene nanodisks at finite temperatures upon being subjected to an external magnetic field. Using a semianalytical approach, which fully describes the eigenmodes and polarizability of the graphene nanodisks, we show that the hybridization originates from the coupling of transitions between thermally populated Landau levels and localized magnetoplasmon resonances of the nanodisks. Owing to their origin, these modes combine the extraordinary magneto-optical response of graphene with the strong field enhancement of plasmons, making them an ideal tool for achieving strong chiral light-matter interactions, with the additional advantage of being tunable through carrier concentration, magnetic field, and temperature.
View Article and Find Full Text PDFAdv Mater
December 2024
State Key Laboratory of Food Science and Technology, International Joint Research Laboratory for Biointerface and Biodetection, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.
In this study, polypeptide TGGGPLGVARGKGGC-induced chiral manganese dioxide supraparticles (MnO SPs) are prepared for sensitive quantification of matrix metalloproteinase-9 (MMP-9) in vitro and in vivo. The results show that L-type manganese dioxide supraparticles (L-MnO SPs) exhibited twice the affinity for the cancer cell membrane receptor CD47 (cluster of differentiation, integrin-associated protein) than D-type manganese dioxide supraparticles (D-MnO SPs) to accumulate at the tumor site after surface modification of the internalizing arginine-glycine-aspartic acid (iRGD) ligand, specifically reacting with the MMP-9, disassembling into ultrasmall nanoparticles (NPs), and efficiently underwent renal clearance. Furthermore, L-MnO facilitates the quantification of MMP-9 in mouse tumor xenografts, as demonstrated by circular dichroism (CD) and magnetic resonance imaging (MRI) within 2 h.
View Article and Find Full Text PDFJ Chromatogr A
December 2024
Department of Pharmacy, Affiliated Hospital of Nantong University, No.20 Xisi Road, Nantong, Jiangsu 226001, PR China. Electronic address:
The joint use of deep eutectic solvents (DESs) and cyclodextrins (CDs) has been well demonstrated to have a promoting effect on chiral separation in capillary electrophoresis (CE). These studies focused on constructing synergistic separation systems by adding DESs and CDs to the buffer solution respectively. In this work, for the first time, β-cyclodextrin (β-CD), methyl-β-cyclodextrin (M-β-CD), and hydroxypropyl-β-cyclodextrin (HP-β-CD) were directly used as precursors to prepare several CDs-based deep eutectic supramolecules (DESUPs) by assembling with two organic acids (L-lactic acid and L-malic acid) in different ratios through a simple two-phase mixing.
View Article and Find Full Text PDFNano Lett
December 2024
Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo, 169-8555, Japan.
In this study, we examine the three-dimensional chiral optical field in the vicinity of a gold nanoplate using aperture-type scanning near-field optical microscopy. Near-field imaging indicates that the chiral optical field shows a unique spatial distribution and depends on the incident polarization. We also evaluate the modal dependence of chiral optical fields, which reveals that the plasmon mode with E symmetry contributes substantially to the chiral optical field while that with A symmetry contributes little because of the high spatial symmetry.
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