190185-71-8Relevant academic research and scientific papers
MANUFACTURING METHOD OF ORGANIC SILICONE COMPOUND DUE TO HYDROSILYLATION OF ALLYL ETHER COMPOUND
-
Paragraph 0031-0032; 0039-0041, (2021/02/05)
To provide a manufacturing method of an organosilicon compound capable of efficiently manufacturing silane having an oxyalkylene group.SOLUTION: A manufacturing method of an organosilicon compound having a molecular weight of 3000 or smaller contains a step of hydrosilylation reaction under the presence of a ruthenium catalyst of (I) an allyl ether compound having at least one allyl group at an end in one molecule and at least oxyalkylene group, and (II) a hydrosilane compound.SELECTED DRAWING: None
Ruthenium-catalyzed selective hydrosilylation reaction of allyl-functionalized PEG derivatives
Inomata, Koya,Naganawa, Yuki,Guo, Haiqing,Sato, Kazuhiko,Nakajima, Yumiko
supporting information, (2019/09/17)
Reactions of allyl-functionalized poly(ethylene glycol) (PEG) derivatives with alkoxysilanes proceeded efficiently to furnish the corresponding hydrosilylated products in good to excellent yields using a ruthenium catalyst, [RuCl2(nbd)]n. A preliminary mechanistic study supported the pivotal role of the PEG moiety, which coordinated to the ruthenium atom during the reaction to achieve high reaction selectivity. This method may be applicable to the synthesis of various PEGs with a silyl terminus, which is useful as biocompatible and low toxic silane coupling agents.
Quantification of grafted poly(ethylene glycol)-silanes on silicon by time-of-flight secondary ion mass spectrometry
Norrman,Papra,Kamounah,Gadegaard,Larsen
, p. 699 - 708 (2007/10/03)
Silicon grafted monodisperse poly(ethylene glycol) (PEG) silanes with various PEG chain lengths and mixtures of these were systematically analyzed with static time-of-flight secondary ion mass spectrometry (TOF-SIMS). The mass spectra show differences in the various relative signal intensities, an observation that was used to elucidate important aspects of the grafting process. The relationship between PEG-silane fragment ion abundances and Si+ ion abundances were used to (i) qualitatively describe layer thicknesses of grafted mixtures of PEG-silanes on silicon, (ii) construct a calibration curve from which PEG chain length (or molecular mass) can be determined and (iii) quantitatively determine surface mixture compositions of grafted monodisperse PEG-silanes of different chain lengths (3, 7 and 11 PEG units). The results suggest that discrimination does take place in the adsorption process. The PEG-silane with the shorter PEG chain is discriminated for mixtures containing PEG3-silane, whereas the PEG-silane with the longer PEG chain is discriminated in PEG7/PEG11-silane mixtures. The origin of this difference in adsorption behavior is not well understood. Aspects of the grafting process and the TOF-SIMS analyses are discussed. Copyrigh
