申请人:DIONEX CORPORATION
公开号:US09340562B1
公开(公告)日:2016-05-17
A chromatographic material comprising a zwitterionic ligand covalently bound to a substrate, the ligand preferably has a formula II:
wherein
R1, R2, R3 are independently selected from an oxygen atom that is configured to connect to a substrate atom in the substrate, an oxygen atom that is configured to connect to a silicon atom of an adjacent ligand, a hydroxyl group, a halogen atom, an alkoxy group, a dialkylamino group, an acyl group, an alkyl group, or an aryl group;
L1, L2 and L3 are independently hydrophobic moieties; each containing 2 to 30 carbon atoms, wherein there are at least 10 carbon atoms in the combined chain lengths of L1, L2 and L3;
X is an O atom, S atom, amide group or sulfonamide group;
n is 0 or 1;
R4, R5 are independently selected from a hydrogen atom or a hydrocarbon moiety containing 1 to 20 carbon atoms; and
Rf is a negatively charged moiety comprising a sulfonic, carboxylic, or phosphonic functional group.
一种包含一个偶极配体共价结合到基底的色谱材料,该配体优选具有公式II:
其中R1、R2、R3独立选择自连接到基底中的基底原子的氧原子、连接到相邻配体的硅原子的氧原子、羟基、卤素原子、烷氧基、二烷基氨基基团、酰基、烷基或芳基;L1、L2和L3是独立的疏水基团,每个含有2到30个碳原子,其中L1、L2和L3的链长度组合中至少有10个碳原子;X是O原子、S原子、酰胺基团或磺酰胺基团;n为0或1;R4、R5独立选择自氢原子或含有1到20个碳原子的碳氢基团;以及Rf是包含磺酸、羧酸或磷酸官能团的带负电荷的基团。