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tetrafluoroboric acid solution
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Showing 1-13 of 13 results for "tetrafluoroboric acid solution" within Papers
Jefferson D Revell et al.
Organic letters, 4(18), 3071-3073 (2002-08-31)
[reaction: see text] Room-temperature ionic liquids promote various transition metal-catalyzed reactions in the solution phase. Here, for the first time, we show that these effects are translatable to solid-phase reactions. The Suzuki-Miyaura cross-coupling of 4-iodophenol immobilized on polystyrene-Wang resin with
Lim Jeong et al.
International journal of molecular sciences, 15(4), 6857-6879 (2014-04-25)
Ag nanoparticles (NPs) were synthesized in formic acid aqueous solutions through chemical reduction. Formic acid was used for a reducing agent of Ag precursor and solvent of gelatin. Silver acetate, silver tetrafluoroborate, silver nitrate, and silver phosphate were used as
H M Liebich et al.
Journal of chromatography. A, 843(1-2), 237-245 (1999-07-10)
Trimethyloxonium tetrafluoroborate (TMO) is applied as derivatising reagent to transform urinary organic acids into their methyl esters. The method is suggested as an alternative to the use of diazomethane which is carcinogenic and explosive. In contrast to other methods avoiding
Lei Chen et al.
Mikrochimica acta, 186(7), 470-470 (2019-06-27)
This study describes a highly selective, sensitive and eco-friendly method for the determination of sulfonylurea herbicides (SUHs) in soya milk and grape juice samples. The SUHs can be extracted selectively and effectively by using molecularly imprinted multiple monolithic fibers (BNMIP/MMF)
M Gómez et al.
Biochimie, 83(10), 961-967 (2001-12-01)
The variation of kinetic parameters of beta-xylosidase from Trichoderma reesei QM 9414 with pH was used to elucidate the chemical mechanism of the p-nitrophenyl beta-D-xylopyranoside hydrolysis. The pH-dependence of V and V/K(m) showed that a group on the enzyme with
Nicolas Pradeille et al.
Chemistry & biodiversity, 9(11), 2528-2558 (2012-11-20)
The total syntheses of hypomurocin A3 and hypomuricin A5 (HM A3 and HM A5, resp.) in solution phase are described. These syntheses have been successfully achieved by applying the 'azirine/oxazolone method' to introduce the two Aib-Pro units into the backbone
Zi-Qiang Fan et al.
Journal of chromatography. A, 1559, 136-140 (2017-05-18)
This paper presents a novel analytical method for the determination of piperidinium ionic liquid cations in environmental water by hydrophilic interaction liquid chromatography and solid-phase extraction technology. The left standing, centrifuged and filtered river water samples were first purified and
Jui-Yen Lin et al.
Water research, 155, 362-371 (2019-03-12)
Tetrafluoroborate anion (BF4-) is found in the streams of flue-gas desulfurization and borosilicate glasses etching which deteriorates water quality through slow hydrolysis into boric acid and fluoride. Decomposition and electrocoagulation (EC) of BF4- were studied using metallic aluminum as the
Ross S Forgan et al.
Dalton transactions (Cambridge, England : 2003), 39(7), 1763-1770 (2010-05-08)
3-Dialkylaminomethyl substituted salicylaldoximes are efficient metal salt extractants, and, in contrast to related "salen"-based reagents, are sufficiently stable to acid hydrolysis to allow commercial application in base metal recovery. Crystal structures show that metal salts are bound by a zwitterionic
Xue Zhao et al.
Journal of chromatography. A, 1611, 460618-460618 (2019-11-02)
In this study, a monolithic enzyme reactor based on a strategy of green synthesis was successfully prepared in a capillary with trypsin immobilized by "thiol-ene" click reaction. A polymer of poly(butyl methacrylate-co-α-methacrylic acid-co-ethylene glycol dimethacrylate) was prepared in a mixture
J T Watson et al.
Journal of molecular graphics & modelling, 19(1), 119-128 (2001-05-31)
Trapping folding intermediates of cystinyl proteins by covalent modification of free sulfhydryl groups provides the opportunity for isolation, purification, and structural elucidation of individual species. The disulfide structure of the intermediates, coupled with their temporal abundance, provides a 'snapshot' of
Howard Z Ma et al.
Nanoscale, 11(47), 22880-22889 (2019-11-26)
The reactions between silver salts and borohydrides produce a rich set of products that range from discrete mononuclear compounds through to silver nanoparticles and colloids. Previous studies using electrospray ionization mass spectrometry (ESI-MS) to track the cationic products in solutions
Vincent Sichula et al.
The journal of physical chemistry. B, 114(29), 9452-9461 (2010-07-06)
We investigated the oxidation behavior of 5-ethyl-4a-hydroxy-3-methyl-4a,5-dihydrolumiflavin (pseudobase Et-FlOH) in acetonitrile with the aim of determining if the two-electron oxidized Et-FlOH(2+) undergoes a release of hydroxyl cation and the production of 5-ethyl-3methyllumiflavinium cation (Et-Fl(+)). The focus of this work is
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