Topic
Reagent
About: Reagent is a research topic. Over the lifetime, 60091 publications have been published within this topic receiving 1234928 citations. The topic is also known as: reagens.
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TL;DR: An inexpensive, thermally stable deoxyfluorination reagent is reported that fluorinates a broad range of alcohols without substantial formation of elimination side products and enables deoxy fluorination on preparatory scale.
Abstract: We report an inexpensive, thermally stable deoxyfluorination reagent that fluorinates a broad range of alcohols without substantial formation of elimination side products. This combination of selectivity, safety, and economic viability enables deoxyfluorination on preparatory scale. We employ the [18F]-labeled reagent in the first example of a no-carrier-added deoxy-radiofluorination.
187 citations
TL;DR: Stabilization of stannous chloride as reducing agent for the analysis of phosphorus by the molybdenum blue method has been achieved by combining it with hydrazine sulphate.
Abstract: Stabilization of stannous chloride as reducing agent for the analysis of phosphorus by the molybdenum blue method has been achieved by combining it with hydrazine sulphate. Application of the procedure to the determination of inorganic and nucleotide phosphorus is described. Colorimetric measurement of light absorption is made at 700 mμ, permitting a highly sensitive and accurate estimation of phosphorus.
187 citations
TL;DR: The mechanism for enhanced desorption of chloroaliphatic compounds from a silty loam soil by modified Fenton's reagent was investigated using a series of probe compounds of varying hydrophobicities as discussed by the authors.
Abstract: The mechanism for enhanced desorption of chloroaliphatic compounds from a silty loam soil by modified Fenton's reagent was investigated using a series of probe compounds of varying hydrophobicities. Hexachloroethane, which has negligible reactivity with hydroxyl radicals, was transformed more rapidly in modified Fenton's reactions (≥0.3 M hydrogen peroxide) than it was lost by gas-purge desorption, suggesting the existence of a non-hydroxyl radical mechanism. The addition of excess 2-propanol to scavenge hydroxyl radicals slowed, but did not stop, the desorption and degradation of hexachloroethane. In the presence of the reductant scavenger chloroform, hexachloroethane did not desorb and was not degraded, indicating that a reductive pathway in vigorous Fenton-like reactions is responsible for enhanced contaminant desorption. Fenton-like degradation of hexachloroethane yielded the reduced product pentachloroethane, confirming the presence of a reductive mechanism. In the presence of excess 2-propanol, tolu...
187 citations
TL;DR: In this paper, the authors show that pure liquid water becomes a surprisingly effective medium for the reactions of organic compounds and may function simultaneously as a convenient solvent, catalyst, and reagent for reactions which are typically acid- or base-catalyzed.
Abstract: At high temperatures and pressures, pure liquid water becomes a surprisingly effective medium for the reactions of organic compounds. It may function simultaneously as a convenient solvent, catalyst, and reagent for reactions which are typically acid- or base-catalyzed. Rapid and highly selective conversions are observed for the majority of the compounds in this study
187 citations
TL;DR: This review discusses in detail enzyme structure, biocatalysis, enzymes as analytical reagents, properties of glucose oxidase (including a historical account), and the use of glucose oxidation as an analytical reagent in homogeneous systems as well as an immobilized reagent.
Abstract: Glucose oxidase (EC 1.1.3.4) is the most widly employed enzyme as analytical reagent. This is the result of (1) its utility in the determination of glucose, an analyte of wide analytical interest, and (2) its relatively low cost and good stability that make the glucose/glucose oxidase system a very convenient model for method development (particularly in the area of biosensors). This review discusses in detail enzyme structure, biocatalysis, enzymes as analytical reagents, properties of glucose oxidase (including a historical account), and the use of glucose oxidase as an analytical reagent in homogeneous systems as well as an immobilized reagent.
186 citations