...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the Chemical Society of Japan >Ion Association of Primary Ammonium Ions with Aromatic Anions by Capillary Zone Electrophoresis
【24h】

Ion Association of Primary Ammonium Ions with Aromatic Anions by Capillary Zone Electrophoresis

机译：毛细管区带电泳将初级铵离子与芳香族阴离子缔合

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ion associability of some alkylammonium-type ion association reagents with the positional isomere of aromatic anions has been examined in an aqueous solution through electrophoretic mobility changes of the corresponding anions in capillary zone electrophoresis. Ion associability of the alkylammonium ions was investigated for monovalent and divalent cationic groups, considering the hydrophilicity and hydrophobicity of cationic groups and the hydration of the ionic site. When such monovalent cationic reagents as hexylmethylammonium,hexyltrimethylammonium, and hexyl-triethylammonium ions were used, the ion associability increased with an increase in the number and bulkiness of alkyl groups of the cations. On the other, hand, hexylammonium ion, a primary ammonium ion, showed different behavior: Higher ion associability was obtained with aromatic anions possessing two carboxylate groups at adjacent positions. Also ion associability of the primary diammonium ions with phthalate and naphthalene-2,3-dicarboxylate ions was the highest among their positional isomere, which was the reverse behavior from that obtained with quaternary diammonium ions. Such characteristic ion associability in the primary ammonium ions could be explained from the hydrophilicity of the ionic groups of the pairing ions: A primary ammonium group is more ion associable with hydrophilic anionic groups.
机译：通过在毛细管区带电泳中相应阴离子的电泳迁移率变化，在水溶液中检查了某些烷基铵型离子缔合试剂与芳香族阴离子的位置同分异构体的离子缔合性。考虑到阳离子基团的亲水性和疏水性以及离子位的水合作用，研究了烷基铵离子对一价和二价阳离子基团的离子缔合性。当使用诸如己基甲基铵，己基三甲基铵和己基三乙基铵离子的一价阳离子试剂时，离子缔合性随着阳离子的烷基数目和体积的增加而增加。另一方面，己铵离子己铵离子表现出不同的行为：在相邻位置具有两个羧酸根的芳香族阴离子具有更高的离子缔合性。另外，伯二铵离子与邻苯二甲酸酯和萘2,3-二羧酸酯离子的离子缔合性在它们的位置同位异构体中最高，这是与季铵离子相反的行为。伯铵离子中这种特征性的离子缔合性可以通过成对离子的离子基团的亲水性来解释：伯铵基与亲水性阴离子基团的缔合性更高。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号