Topic
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.
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TL;DR: In this article , the authors investigated fuel cells that included ESM-absorbing xanthene-, triphenylmethane-, and azo-type tar dye, which contained abundant hydrophilic groups, as polymer electrolytes.
Abstract: Recently, polymer electrolytes have been developed for high-performance and eco-friendly fuel cells. Among the candidates, eggshell membrane (ESM) has been promising because of its abundance to assemble various energy devices with low cost and its absorption ability of organic materials. In this work, we investigated fuel cells that included ESM-absorbing xanthene-, triphenylmethane-, and azo-type tar dye, which contained abundant hydrophilic groups, as polymer electrolytes. We found out two points: (1) that the fuel cells that included ESM-absorbing xanthene-type dye generated the highest I–V performance, and (2) the basic molecular structures of the tar dyes determined the correlation of the maximum power and proton conductivities.
1 citations
25 May 2021
TL;DR: In this article, the 1,8-dioxo-octahydroxantene was synthesized from 4-hydroxybenzaldehyde and 1,3-cyclohexanedione.
Abstract: The 1,8-dioxo-octahydroxantene has many derivates. One of those is 9-(4-hydroxyphenyl)-3,4,6,7-tetrahydro-2H-xanthene-1,8(5H,9H)-dione. This compound has been successfully synthesized from 4-hydroxybenzaldehyde and 1,3-cyclohexanedione. This reaction has been catalyzed by lime and lemon juice under the free solvent condition. It is assumed that citric acid in both materials has a role in catalyzing this reaction. The advantages of using them as catalysts are biodegradable, environmentally safe, and cheap. Besides that, the synthesis of this compound only required one reaction stage, and the product was easily purified. The structure of the pure product was determined by FT-IR, H-NMR, and GC-MS. The antioxidant activity of this compound was investigated by the DPPH method. This compound had an antioxidant activity with inhibition percentage over 53.42%.
1 citations
1 citations
Patent•
09 Jan 2003
TL;DR: In this article, a new xanthene compound which can give printed products having excellent light fastness without increasing the amount of an additive, and to provide a coloring liquid using the same solution was proposed.
Abstract: PROBLEM TO BE SOLVED: To provide a new xanthene compound which can give printed products having excellent light fastness without increasing the amount of an additive, and to provide a coloring liquid using the same SOLUTION: This xanthene compound having a structure represented by the general formula (I) [R 1 and R 2 are each independently a 1 to 4C straight chain or branched alkyl; R 3 and R 4 are each independently H, a 1 to 4C straight chain or branched alkyl or a 1 to 4C straight chain or branched alkoxy; M is H, an alkyl metal or NH 4 ] COPYRIGHT: (C)2004,JPO&NCIPI
1 citations
TL;DR: In this paper, an aryl-bridged dixanthene scaffold is quickly prepared and readily derivatized with functional groups at the four 4,5-positions adjacent to the oxygen atoms of the two xanthene groups: syntheses of five potentially tetradentate, multinucleating, metal binding ligands illustrate the usefulness of the methodology.
1 citations