Synthesis and structure–activity relationships of nonionic surfactants with short fluorocarbon chains
作者:Ruiguo Wang、Lingyun Song、Yuanqiang Guo、Junjie Kou、Hongjian Song、Yuxiu Liu、Jingjing Zhang、Qingmin Wang
DOI:10.1016/j.molliq.2020.114486
日期:2021.1
biodegradability of fluorinated surfactants can be improved by reducing the length of the fluorocarbon chain. In this study, ten new nonionic fluorinated surfactants with various hydrophilic and hydrophobic chain lengths were synthesized by means of substitution and ring-opening reactions using methoxypolyethylene glycols (mPEGs) or 2-methoxyethanol, epibromohydrin, and perfluoroalkyl alcohols as raw materials
Hydrogen bonds and protonation of carbonyl-containing polynuclear rhodium complexes
作者:A. N. Krylov、E. S. Shubina、D. V. Muratov、E. V. Vorontsov、L. M. Epshtein
DOI:10.1007/bf00702158
日期:1995.2
the interaction of bi-, tri-, and tetranuclear cyclopentadienylcarbonyl rhodium complexes with rather weak protic acids (phenols, fluoroalcohols) in low-polarity media results in the formation of hydrogen bonds of the OH...O=C type with bridged carbonyl groups. According to1H NMR data, protonation of these complexes with strong acids (CF3COOH and HBF4) occurs at the the Rh-Rh bond to give the symmetrical