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1
المصدر: Org. Biomol. Chem.. 10:705-709
مصطلحات موضوعية: Anions, Models, Molecular, Organic Chemistry, Inorganic chemistry, Water, Chromophore, Redox sensor, Electrochemistry, Photochemistry, Biochemistry, Redox, Fluorides, chemistry.chemical_compound, Spectrometry, Fluorescence, chemistry, Heterocyclic Compounds, Spectrophotometry, Pyrroles, Physical and Theoretical Chemistry, Oxidation-Reduction, Fluoride, Tetrathiafulvalene
الوصف: A chemosensor bearing dipyrrolyl motifs as recognition sites and a tetrathiafulvalene redox tag has been evaluated as an optical and redox sensor for a series of anions (F(-), Cl(-), Br(-), HSO(4)(-), CH(3)COO(-), and H(2)PO(4)(-)) in DCM solution. The receptor shows specific optical signaling for fluoride but little electrochemical effect in solution. The solid-state performance of the sensor leads to measurable changes in water. Design implications towards better systems based on these results and other examples are discussed.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db5702434925f62279cfc7ad0583621aTest
https://doi.org/10.1039/c1ob06459bTest -
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المؤلفون: Kazuo Tanaka, Narufumi Kitamura, Yoshiki Chujo, Yuichi Takahashi
المصدر: Bioorganic & medicinal chemistry. 17(11):3818-3823
مصطلحات موضوعية: Magnetic Resonance Spectroscopy, Macromolecular Substances, Metallocenes, Clinical Biochemistry, Fluorescence spectrometry, Analytical chemistry, Pharmaceutical Science, 19F MRI, Fluorine-19 NMR, Photochemistry, Biochemistry, Redox, Models, Biological, Metal complex, chemistry.chemical_compound, Drug Discovery, Moiety, Ferrous Compounds, Molecular Biology, Multimodality, Valence (chemistry), Chemistry, Organic Chemistry, Reversible switch, Nuclear magnetic resonance spectroscopy, Redox sensor, Spectrometry, Fluorescence, Ferrocene, Molecular Medicine, Metallocene, Oxidation-Reduction
الوصف: We present here the reversible signal regulation of (19)F NMR using the transition metal complex as a switching module. Water-soluble fluorinated dendrimers containing ferrocene were synthesized as a probe, and the signal intensities of (19)F NMR of the probes were monitored by changing the valence state of the ferrocene moiety. By oxidation of the ferrocene moiety, the relaxation of the nearby fluorine atoms was accelerated via the paramagnetic relaxation enhancement, as a result the (19)F NMR signal from the probe was significantly decreased. The reduction of the ferrocenium cation of the probe recovered the signal intensity. Finally, in combination with the difference of the fluorescence quenching ability between ferrocene and ferrocenium cation, we constructed the multimodal (19)F NMR/fluorescence probe based on the redox switching system.
وصف الملف: application/pdf
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44733501da686504751f159f128403b3Test
http://hdl.handle.net/2433/123364Test -
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المؤلفون: Radoslaw Kierat, Birgit M.B. Thaler, Roland Krämer
المصدر: Bioorganicmedicinal chemistry letters. 20(4)
مصطلحات موضوعية: Fluorophore, Hydroquinone, Molecular Structure, Rhodamines, Organic Chemistry, Clinical Biochemistry, Pharmaceutical Science, Redox sensor, Photochemistry, Biochemistry, Fluorescence, Redox, Hydroquinones, chemistry.chemical_compound, Structure-Activity Relationship, chemistry, Drug Discovery, Rhodamine B, Molecular Medicine, Molecular Biology, Oxidation-Reduction, Fluorescent Dyes
الوصف: A fluorescent redox sensor was prepared by attachment of hydroquinones to the fluorophore rhodamine B; fluorescence is reversibly modulated by hydroquinone-centered chemical redox reactions, and oxidation potential of the sensor is tuneable by variation of hydroquinone structure.
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0107d0292c807ee18190b7c65b1dbe32Test
https://pubmed.ncbi.nlm.nih.gov/20100659Test
