Transition Structure Geometries for Transfers of Neutral and Anionic Nitrogen to Lithiated Carbanions
作者:Peter Beak、Kathryn Conser Basu、James J. Li
DOI:10.1021/jo990509g
日期:1999.7.1
reaction via an oriented ionpair. Attempted endocyclic restriction tests for transfers of formally anionic nitrogen with 32 and 33 were not successful. Reactions of n-butyl, s-butyl and tert-butyllithium reagents with 16, 23, 30, 31, and 36-38 generally afford higher yields with increasing substitution at the carbon of the organolithium reagent and with decreasing substitution adjacent to the nitrogen
METHOD FOR PREPARING GRAPHENE USING A BLOCK COPOLYMER
申请人:LG CHEM, LTD.
公开号:EP3699214A1
公开(公告)日:2020-08-26
The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.