维普中文期刊产品整合服务
10篇 您的检索式:作者名="Hesemann"
    题名 作者 年代 出处 被引量
1Highly ordered functional organosilicas by template-directed hydrolysis-polycondensation of chiral camphorsulfonamide precursors 显示文摘GADENNE B HESEMANN P MOREAU J 2006Eur J Inorg Chem2006,18,9:1
2Task-specific ionic liquids bearing 2-hydroxybenzytamine units: Synthesis and americi- um-extraction studies显示文摘Ouadi A Gadenne B Hesemann P 2006Chem2006,12,11:1
3Untersuchungen zur Pollenentwicklung und Pollenschlauchbildung bei hheren Pflanzen显示文摘Hesemann CU 1973 1973Theoretical and Applied Genetics1973,43,:1
4Supported ionic liquids: ordered mesoporous silicas containing cova lently linked ionic species显示文摘GADENNE B HESEMANN P MOREAU J J E 2004Chem Commun2004,,15:1
5Ionic liquids incorporating camphorsulfonamide units for the Ti-promoted asymmetric diethylzinc addition to benzaldehyde显示文摘Gadenne B Hesemann P Moreau J J E 2004Tetrahedron Lett2004,45,44:1
6Surprisingly high, bulk liquid-like mobility of silica-confmed ionic liquids 显示文摘Gobel R Hesemann P Weber J 2009Physical Chemistry Chemical Physics2009,11,19:1
7显示文摘Ciriminna R Hesemann P Moreau JE 2006Chemistry-A- European Journal2006,12,20:1
8Dialkyl imidazolium acetate ionosilica as efficient and recyclable organocatalyst for cyanosilylation reactions of ketones显示文摘We report new heterogeneous organocatalyst based on silica hybrid supported N-heterocyclic carbene(NHC-)species.The organocatalyst is formed from an imidazolium iodide based ionosilica material,followed by iodide/acetate anion exchange.The imidazolium acetate generates the organocatalytic carbene via partial deprotonation of the imidazolium ring in situ.As monitored via EDX,solid state NMR and ion chromatography measurements,the iodide/acetate exchange involving the imidazolium ionosilica material took place only in small extent.Despite the fact that the exchanged material contains only a very small amount of acetate,we observed good catalytic activity and recyclability in cyanosilylation reactions of ketones with trimethylsilyl cyanide.The versatility of the catalyst was highlighted via reaction with several substrates,yielding the corresponding cyanohydrins in good yields.In recycling experiments,the material showed decreasing catalytic activity starting from the third reaction cycle,but high catalytic activity can be regenerated via another acetate treatment.Our work is important as it highlights the possibility to combine carbene chemistry and silica,which are antagonistic at a first glance.We show that imidazolium acetate based ionosilicas are therefore heterogeneous'proto-carbenes',and that there is no need to form strongly basic silica supported NHCs to obtain heterogeneous NHC-organocatalysts.This work therefore opens the route towards heterogeneous and re-usable NHC-organocatalysts from supported ionic liquid imidazolium acetates.Thanh Tran Duy Alysson Duarte Rodrigues Giang Vo-Thanh Peter Hesemann 2020Green Energy & Environment2020,5,2:1
9Polystyrenea modified by short arylenevinylene segements for light-emitting applications: Synthesis and structure-property rvalationships 显示文摘Hesemann P Greiner A 1997Poly- mers for Advanced Technologies1997,8,:1
10Chronic kidney disease and cardiovascular risk显示文摘Yerram P Karuparthi PR Hesemann L 0,,03:1
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费