Untersuchungen über den Mechanismus der Reaktion von Aromaten mit Marquis Reagens

Rehse, Klaus; Kawerau, H.-G.

doi:10.1002/ardp.19743071208

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…The mechanism of this type of reaction has been studied in the literature, and several similar polyphenolic monomers were polymerization under similar conditions for different types of applications. − Although some benzoquinone scaffolds have been polymerized using this approach, to the best of our knowledge, this is the first time an anthraquinone-based monomer has been polymerized using phenol formaldehyde polymer chemistry, opening yet another synthetically pathway for anthraquinone-derived polymers …”

Section: Resultsmentioning

confidence: 99%

Bio-Based Polyhydroxyanthraquinones as High-Voltage Organic Electrode Materials for Batteries

Lap,

Goujon,

Mantione

et al. 2023

ACS Appl. Polym. Mater.

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Organic materials have gained much attention as sustainable electrode materials for batteries. Especially bio-based organic electrode materials (OEMs) are very interesting due to their geographical independency and low environmental impact. However, bio-based OEMs for high-voltage batteries remain scarce. Therefore, in this work, a family of bio-based polyhydroxyanthraquinones (PHAQs)�namely 1,2,3,4,5,6,7,8-octahydroxyanthraquinone (OHAQ), 1,2,3,5,6,7-hexahydroxyanthraquinone (HHAQ), and 2,3,6,7-tetrahydroxyanthraquinone (THAQ)�and their redox polymers were synthesized. These PHAQs were synthesized from plant-based precursors and exhibit both a high-potential polyphenolic redox couple (3.5−4.0 V vs Li/ Li + ) and an anthraquinone redox moiety (2.2−2.8 V vs Li/Li + ), while also showing initial charging capacities of up to 381 mAh g −1 . To counteract the rapid fading caused by dissolution into the electrolyte, a facile polymerization method was established to synthesize PHAQ polymers. For this, the polymerization of HHAQ served as a model reaction where formaldehyde, glyoxal, and glutaraldehyde were tested as linkers. The resulting polymers were investigated as cathode materials in lithium metal batteries. PHAQ polymer composites synthesized using formaldehyde as linker and 10 wt % multiwalled carbon nanotubes (MWCNTs), namely poly(THAQ−formaldehyde)−10 wt % MWCNTs and poly(HHAQ−formaldehyde)−10 wt % MWCNTs, exhibited the best cycling performance in the lithium metal cells, displaying a high-voltage discharge starting at 4.0 V (vs Li/Li + ) and retaining 81.6 and 77.3 mAh g −1 , respectively, after 100 cycles.

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Section: Resultsmentioning

confidence: 99%

Bio-Based Polyhydroxyanthraquinones as High-Voltage Organic Electrode Materials for Batteries

Lap,

Goujon,

Mantione

et al. 2023

ACS Appl. Polym. Mater.

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“…4 Formation of a colored product is thought to be the result of the dimerization of the drug molecule in the presence of formaldehyde and a strong acid. 6,10 While color tests are rapid, sensitive, and affordable, there remain concerns for their use in drug identification. 11 The Scientific Working Group for the Analysis of Seized Drugs (SWGDRUG) classifies color tests as a Category C presumptive analytical technique.…”

Section: Introductionmentioning

confidence: 99%

“…4 Formation of a colored product is thought to be the result of the dimerization of the drug molecule in the presence of formaldehyde and a strong acid. 6,10…”

Section: Introductionmentioning

confidence: 99%

Combining presumptive color tests, pressure-sensitive adhesive-based collection, and paper spray-mass spectrometry for illicit drug detection

Prunty,

Carmany,

Dhummakupt

et al. 2023

Analyst

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Zur Analytik phenylsubstituierter Barbiturate in konzentrierter Schwefelsäure

Auterhoff

Streck

1976

Archiv der Pharmazie

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Reactions of Phenyl Substituted Barbiturates in Concentrated Sulfuric AcidThree reactions of phenobarbitone in concentrated sulfuric acid were investigated.(1) With sodium nitrite in concentrated sulfuric acid phenobarbitone forms an orange EDAcomplex (Ph. Eur.).(2) With an excess of formaldehyde in 83,7 % sulfuric acid phenobarbitone gives a ruby colour (DAB 7) which is due to the formation of carbenium ions. The final product of the reaction is a yellow substance with methylene-and oxymethylene bridges. (3) The reaction of phenobarbitone with piperonal in sulfuric acid (DAB 7-DDR) is in reality areaction with formaldehyde, whichis formed as an intermediate. Only 1/13 mole of formaldehyde is formed per mole of phenobarbitone. The green colour is due to a quinone structure without methylene-or oxymethylene bridges. In this reaction piperonal can be replaced by hexamethylentetramine or trioxane.Phenobarbital wird nach der Ph. Eur. durch die Orangefarbung identifiziert, die esmit Natriumnitrit in konzentrierter Schwefelsfiure gibt. Das DAB 7 lie13 Phenobarbital zur Identifizierung mit Formaldehyd-Schwefelsfiure umsetzen, wobei eine Weinrotfarbung entsteht. Das DAB 7-DDR identifziert Phenobarbital durch die Griinfarbung, die bei der Behandlung mit Piperonal in konzentrierter Schwefelsfiure auftrit t . Me *) Teil der Dissertation von Reinhard Srreck, Tiibingen 1976.

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Untersuchungen über den Mechanismus der Reaktion von Aromaten mit Marquis Reagens

Cited by 4 publications

References 4 publications

Bio-Based Polyhydroxyanthraquinones as High-Voltage Organic Electrode Materials for Batteries

Bio-Based Polyhydroxyanthraquinones as High-Voltage Organic Electrode Materials for Batteries

Combining presumptive color tests, pressure-sensitive adhesive-based collection, and paper spray-mass spectrometry for illicit drug detection

Zur Analytik phenylsubstituierter Barbiturate in konzentrierter Schwefelsäure

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