(Me<sub>3</sub>Si)<sub>3</sub>SiH-Mediated Intermolecular Radical Perfluoroalkylation Reactions of Olefins in Water
作者:Sebastián Barata-Vallejo、Al Postigo
DOI:10.1021/jo100901z
日期:2010.9.17
the best radical initiator. We also found that water exerts a relevant solvent effect on the rates of perfluoroalkyl radical additions onto double bonds and the H atom abstraction from the silane. Our account provides a versatile and convenient method to achieve perfluoroalkylation reactions of alkenes in water to render perfluoroalkylated alkanes as key intermediates in the synthesis of fluorophors and
LIQUID CRYSTAL COMPOUND HAVING PERFLUOROALKYL CHAIN, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
申请人:TANAKA Hiroyuki
公开号:US20130048913A1
公开(公告)日:2013-02-28
The invention is to provide a new liquid crystal compound having a high clearing point, a good compatibility with other compounds, a small viscosity, and a high stability to heat, light and so forth; compound (1) is provided:
R
1
CF
2
n
R
2
(1)
wherein, for example, R
1
is alkyl having 4 to 10 carbons or —(CH
2
)
2
—CH═CH
2
, R
2
is alkyl having 2 to 10 carbons, n is 8, and R
1
and R
2
are not allowed to be straight-chain alkyl having an identical number of carbons.
Structure of the Smectic B Phase Formed by Linear and Branched Perfluoroalkyl-Alkanes
作者:F. G. Tournilhac、P. Bassoul、R. Cortès
DOI:10.1080/10587250108025759
日期:2001.6.1
The structure of the smectic B phase formed by perfluorodecylalkanes has been analyzed through the synthesis of three molecules and a careful investigation of their mesophases. Molecules with C-8, C-10 and a branched C-11 alkyl chain were considered. The structure factor analysis of 001 reflexions is consistent with the picture of alternating electron rich and electron poor sublayers. A structural model with segregated perfluoroalkyl chains in the middle of the layer and disordered alkyl chains on each sides is proposed. This model is discussed in terms of space filling arguments: chain lengths, cross section compatibility in the layer and compactness. Infrared dichroic ratios of the CH2 and CF2 stretching modes confirm that perfluoroalkyl subunits are perpendicular to the S-B layer while alkyl ones, in a quasi molten state, fill the remaining layer space.