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THQ–Xanthene: An Emerging Strategy to Create Next‐Generation NIR‐I/II Fluorophores
Advanced Science, 2023 Near‐infrared fluorescence imaging is vital for exploring the biological world. The short emissions (100 nm) for THQ‐modified xanthene dyes is established. Thus, a timely discussion of THQ–xanthene and its applications is extensive.
Wei Tao
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ChemistrySelect, 2023
Abstract Xanthene dyes exhibit remarkable photophysical properties and photostability. Their ability to switch fluorescence on/off depending on the external environment makes them a promising candidate for imaging/sensing/tracking/labeling probes. However, their emission ≤600 nm and Stokes shift ∼34 nm restrict their use in biological
N Sekar
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Abstract Xanthene dyes exhibit remarkable photophysical properties and photostability. Their ability to switch fluorescence on/off depending on the external environment makes them a promising candidate for imaging/sensing/tracking/labeling probes. However, their emission ≤600 nm and Stokes shift ∼34 nm restrict their use in biological
N Sekar
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Chromatography of Xanthene Dyes
Nature, 1960RECENTLY, Lima and Pieroni1have directed attention to the heterogeneous character of the dye rose bengal, which, when labelled with iodine-131, is used in tests of hepatic function2,3. Applying the ethanol–ammonia solvent system of Ishida et al. 4, they claim resolution of this dye into four components, three coloured and one colourless.
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Acta Crystallographica Section C Crystal Structure Communications, 1996
In xanthene-9-carboxylic acid, C14H10O3, hydrogen bonding is of the cyclic dimer type but involves two crystallographically inequivalent molecules and does not occur about a center of symmetry. The carboxylic H atoms are ordered. The dihedral angle (fold angle) of the xanthene core is 14.2 (1) degree for molecule A and 11.3 (2) degrees for molecule B ...
A C, Blackburn, A J, Dobson, R E, Gerkin
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In xanthene-9-carboxylic acid, C14H10O3, hydrogen bonding is of the cyclic dimer type but involves two crystallographically inequivalent molecules and does not occur about a center of symmetry. The carboxylic H atoms are ordered. The dihedral angle (fold angle) of the xanthene core is 14.2 (1) degree for molecule A and 11.3 (2) degrees for molecule B ...
A C, Blackburn, A J, Dobson, R E, Gerkin
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CLEAVAGE OF XANTHENE ETHERS: A NEW ROUTE TO 9-SUBSTITUTED XANTHENES
Canadian Journal of Chemistry, 19649,9-(Tetrachloro-o-phenylenedioxy) xanthene (IIa) and its thio-analogue (IIb) are cleaved by hydrazines to give the corresponding hydrazones of xanthone and thiaxanthone, respectively, together with tetrachlorocatechol. The unsaturated nitriles (Va), (Vb), and (Vc) are produced similarly by the action of malononitrile and cyanoacetic ester ...
N. Latif, I. Fathy, N. Mishriky
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Xanthene-Bridged Cofacial Bisporphyrins
Inorganic Chemistry, 2000The synthesis and characterization of cofacial bisporphyrins juxtaposed by xanthene-bridged pillars are presented. The one-pot preparation of the xanthene dialdehyde avoids the lengthy bridge synthesis accompanying other cofacial porphyrin systems, thus allowing for the facile preparation of homobimetallic zinc (10), copper (11), and nickel (12 ...
C J, Chang +4 more
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Revista de Chimie, 2008
This paper examined the synthesis pathways for new compounds starting from raw materials on the anhydride type reacting with polyphenols. The compounds have been characterized through spectral analysis, with estimation yields for each reaction. Basic material syntheses are also presented.
Lucian Iscrulescu +4 more
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This paper examined the synthesis pathways for new compounds starting from raw materials on the anhydride type reacting with polyphenols. The compounds have been characterized through spectral analysis, with estimation yields for each reaction. Basic material syntheses are also presented.
Lucian Iscrulescu +4 more
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Journal of Heterocyclic Chemistry, 1987
AbstractThe reaction of 1‐naphthol or phenol derivatives with oxalic and sulfuric acids yielded novel spirolactones. Eight examples (2a‐h) were synthesized by this reaction. The structures of the spirolactones were established from spectral evidence and the X‐ray diffraction studies. Some of the spirolactones form the solvates with the aromatic solvent
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AbstractThe reaction of 1‐naphthol or phenol derivatives with oxalic and sulfuric acids yielded novel spirolactones. Eight examples (2a‐h) were synthesized by this reaction. The structures of the spirolactones were established from spectral evidence and the X‐ray diffraction studies. Some of the spirolactones form the solvates with the aromatic solvent
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Photophysical characterization of xanthene dyes
Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyThe growing interest in using photodynamic therapy for cancer treatment and antimicrobial applications has prompted the search for different classes of dyes. In general, the protocols of these studies are different, making it difficult to compare their efficiency directly.
Eduardo V. Bergmann +6 more
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