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Xanthene

About: Xanthene is a research topic. Over the lifetime, 2132 publications have been published within this topic receiving 34803 citations. The topic is also known as: Xanthene & dibenzo[a,e]pyran.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the transient phenomena in a laser flash photolysis study of a new series of xanthene dyes in ethanol solution at room temperature were described, and the difference between the triplet- and ground-state absorption spectra of tetrabromohydrofluorescein (TBHF) or tetraiodohydro-fluorescellin (TIHF) showed peaks around 360 and 580 nm.
Abstract: The transient phenomena in a laser flash photolysis study of a new series of xanthene dyes in ethanol solution at room temperature are described. The difference between the triplet- and ground-state absorption spectra of tetrabromohydrofluorescein (TBHF) or tetraiodohydrofluorescein (TIHF) shows peaks around 360 and 580 nm. Tetrabromohydrocyanofluorescein (TBHCF) and tetraiodohydrocyanofluorescein (TIHCF) demonstrate triplet-triplet absorption with peaks around 340 and 460 nm. The corresponding anion radicals D .- , which are produced by electron-transfer reactions from aromatic amina, have absorption maxima at 410 nm

5 citations

Journal ArticleDOI
TL;DR: In this article , a new 3D multifunctional aggregation induced emission (AIE)-active luminophore of 9,9'dimethyl-9,10dihydroacridine substituted spiro (SFX-Ad) was synthesized.
Abstract: Multifunctional aggregation induced emission (AIE)-active luminophores have drawn great interests in materials science. In this work, a new three-dimensional (3D) luminophore of 9,9’-dimethyl-9,10-dihydroacridine substituted spiro (fluorene-9,9’-xanthene) (SFX-Ad) was synthesized and...

5 citations

Patent
14 Oct 1988
TL;DR: In this article, a compound expressed by the formula A-COOH is reacted with a compound expressing by formula II (Y represents halogen) in an inert solvent such as water or methanol preferably in the presence of a base (example; sodium hydroxide or trimethylamine) at ambient temperature of while being heated to form a compound, followed by elimination of a hydroxyprotecting group.
Abstract: NEW MATERIAL:A compound expressed by formula I (A-CO-represents residue of a medical compound; R represents -NH- or -O-; m is 0 or 1; n is 1-10) and salts thereof. EXAMPLE: Disodium salt of [α-(3',6'-dihydroxy-3-oxo-spiro[phthalan-1,9'- xanthene]-6-carbonyloxy)acetamidomethylene]bis(phosphonic acid). USE: An anti-inflammatory agent, remedy for osteopathy and carcinostatic agent. PREPARATION: A compound expressed by the formula A-COOH is reacted with a compound expressed by formula II (Y represents halogen) in an inert solvent such as water or methanol preferably in the presence of a base (example; sodium hydroxide or trimethylamine) at ambient temperature of while being heated to form a compound expressed by formula III, followed by elimination of a hydroxy-protecting group. COPYRIGHT: (C)1990,JPO&Japio

5 citations

Journal ArticleDOI
TL;DR: In this paper, 4-Chlor-9H-xanthen-9-thion reagiert mit Tetrachlor-o-benzochinon zu dem cyclischen Acetal 2.

5 citations

Journal ArticleDOI
TL;DR: A green route for the synthesis of multi-substituted 2,3-dihydro-xanthenone derivatives using ionic liquid as solvent and amino acid as promoter is described in this paper.
Abstract: A green route for the synthesis of multi-substituted 2,3-dihydro-xanthenone derivatives using ionic liquid as solvent and amino acid as promoter is described. The reaction is simple and proceeds we...

5 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202354
2022136
202182
202091
201986
201891