sulfonic acids

A hybrid silica monolithic stationary phase for RP CEC was prepared by in situ co-condensation of (3-mercaptopropyl)-trimethoxysilane (MPTMS), phenyltriethoxysilane (PTES), and tetraethoxysilane (TEOS) via a sol-gel process. The thiol groups on the surface of the stationary phase were oxidized to sulfonic acids by peroxytrifluoroacetic acid. The introduced sulfonic acid moieties on the monolith...

متن کامل

The Desulfonation of 2, 3-Dioxynaphthalene-6-sulfonic Acid and 2-Naphthol Sulfonic Acids

Journal: :The Journal of the Society of Chemical Industry, Japan 1967

متن کامل

Organic acid-catalyzed polyurethane formation via a dual-activated mechanism: unexpected preference of N-activation over O-activation of isocyanates.

Journal: :Journal of the American Chemical Society 2013

Haritz Sardon Amanda C Engler Julian M W Chan Jeannette M García Daniel J Coady Ana Pascual David Mecerreyes Gavin O Jones Julia E Rice Hans W Horn James L Hedrick

A systematic study of acid organocatalysts for the polyaddition of poly(ethylene glycol) to hexamethylene diisocyanate in solution has been performed. Among organic acids evaluated, sulfonic acids were found the most effective for urethane formations even when compared with conventional tin-based catalysts (dibutyltin dilaurate) or 1,8-diazabicyclo[5.4.0]undec-7-ene. In comparison, phosphonic a...

متن کامل

Can perfluoroalkyl acids biodegrade in the rumen simulation technique (RUSITEC)?

2015

J. Kowalczyk S. Riede H. Schafft G. Breves M. Lahrssen-Wiederholt

BACKGROUND The behaviour of perfluoroalkyl acids (PFAAs) in tissues of ruminants has been shown to differ from that of monogastrics (J Agric Food Chem 61(12):2903-2912 doi:10.1021/jf304680j, 2013; J Agric Food Chem 62(28):6861-6870, 2014). This may be a consequence of the complex microbial ecosystem in the rumen. To evaluate this hypothesis, the recovery of PFAAs was studied using the rumen sim...

متن کامل

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید