五个类似 DOTA 的配体在其 Gd III 复合物的第一配位球中缺乏水分子,即次膦酸盐 H 4 DOTP H 、H 4 DOTP hm 和 H 4 DOTP Et 以及膦酸酯单酯 H 4 DOTP OEt 和 H 4 DOTP合成 OBu 的目的是探索第二水合球对 Gd III 配合物弛豫率的影响。H 4 DOTP H 、H 4 DOTP hm 和H 4 DOTP OEt 配体及其Ln III 配合物通过电位和时间分辨发光表征;Gd III 配合物在热力学上远不如 H 4 DOTA 稳定,并且在内球中没有水配位。游离配体H 4 DOTP OEt和H 4 DOTP H和H 4 DOTP OEt的Gd III复合物的晶体结构通过X射线衍射确定。配合物具有预期的八齿配位模式,具有 N 4 O 4 排列;没有水分子与 Gd III 离子结合。从 1 H 和 31 P NMR 光谱中获得了水溶液中所有五种配体的
Process for the partial hydrogenation of fatty acid esters
申请人:Papadogianakis Georgios
公开号:US20100022664A1
公开(公告)日:2010-01-28
Suggested is a process for the manufacture of unsaturated fatty acid alkyl esters or glycerides having a total content of C 18:1 of about 30 to about 80 Mol-% by partial hydrogenation of unsaturated fatty acid esters having a total content of (C18:2+C18:3) of at least 65 Mol-%—calculated on the total amount of C18 moieties in the ester—which is characterised in that the hydrogenation is conducted in an aqueous/organic two phase system in the presence of a water soluble catalyst consisting of a Group VIII metal and a hydrophilic ligand.