Refinement and quantification of potential oscillation by temporal and spatial control of ion transfer at a liquid/liquid interface

通过液/液界面离子转移的时间和空间控制来细化和量化电位振荡

• 批准号: 16550072
• 负责人: MAEDA Kohji
• 金额: $ 1.92万
• 依托单位: Kyoto Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16550072/
• 关键词: ion transfer; liquid; liquid interface; phospholipid layer; compact layer; lanthanide ion; electrochemical stability; barrier effect; complex formation; 液液界面イオン移動; 電位・電流振動; 酸性リン脂質; 中性リン脂質; 協同効果; 稠密層; リン脂質; ランタニドイオン; イオン移動ボルタンメトリー; 界面張力 /

Cyclic voltammograms for the transfer of K^+ facilitated by dibenzo-18-crown-6 were recorded at the interface between water containing lanthanide ion such as La^<3+> and 1,2-dichloroethane containing phosphatidylcholine (PC) and phosphatidic acid (PA). The mixed monolayer of PC and PA increased the barrier effect on the K^+ transfer, as compared with the compact layer composed of PC only. When the bulk concentration of PC and PA was 10 μM and 20 μM, the blocking effect was attained at maximum, and the potential range for the formation of the compact layer extended most widely to positive potentials. On the contrary, a further excess of PA resulted in the degradation of the compact layer. The electrochemical stability of the mixed compact layer was enhanced by an increase of pH. However, when pH was higher than 4.0, the blocking effect disappeared. The above results are discussed in relation to the complex formation of phospholipids with La^<3+> and the protonation to PC and PA.

记录了二苯并-18-冠-6促进K~+转移的循环伏安曲线，研究了La~(2+)、La~(3+)、Gt~(3+)等稀土离子与含磷脂酰胆碱(PC)和磷脂酸(PA)的1，2-二氯乙烷的界面反应。与仅由PC组成的致密层相比，PC和PA的混合单分子膜增加了对K~+迁移的阻挡作用。当PC和PA的体积浓度分别为10μM和20μM时，封闭效果最好，形成致密层的电位范围扩展到正电位。相反，PA的进一步过量会导致致密层的降解。混合致密层的电化学稳定性随pH的升高而提高。但当pH>4.0时，这种封闭作用消失。上述结果与磷脂与La~(2+)、lt；~(3+)、Gt~(3+)形成络合物以及与PC和PA的质子化有关。

项目成果

Effect of Side or Spacer Chain on the Hydrophobicity of Bis-quaternary Ammonium Ions Studied by the Ion Transfer Voltammetry at the Aqueous | Organic Solution Interface

水相离子转移伏安法研究侧链或间隔链对双季铵离子疏水性的影响- 博士论文

• 发表时间: 2004
• 期刊: J.Electroanal.Chem. 573
• 作者: K.Maeda;T.Goto;A.Uehara;Y.Yoshida
• 通讯作者: Y.Yoshida

Binding affinity of a basic amino acid on a neutral phospholipids monolayer

碱性氨基酸在中性磷脂单层上的结合亲和力

• 发表时间: 2006
• 期刊: Chem.Lett. 35
• 作者: Y.Yoshida;K.Maeda;O.Shirai;T.Ohnuki
• 通讯作者: T.Ohnuki

The Complex Formation of Ions with a Phospholipids Monolayer Adsorbed at an Aqueous | 1,2-dichloroethane-Interface

水相中吸附的磷脂单层离子的复合形成

• 发表时间: 2005
• 期刊: J.Electroanal.Chem. 578
• 作者: Y.Yoshida;K.Maeda;O.Shirai
• 通讯作者: O.Shirai

Voltammetric elucidation of ion transfer through an extremely thin membrane

• DOI: 10.1002/elan.200302883
• 发表时间: 2004-05-01
• 期刊: ELECTROANALYSIS
• 影响因子: 3
• 作者: Ichieda, N;Shirai, O;Kihara, S
• 通讯作者: Kihara, S

The Complex Formation of Ions with a Phospholipids Monolayer Adsorbed at an Aqueous | 1,2-dichloroethane Interface

水相中吸附的磷脂单层离子的复合形成

• 发表时间: 2005
• 期刊: J.Electroanal.Chem. (印刷中)
• 作者: Y.Yoshida;K.Maeda;O.Shirai
• 通讯作者: O.Shirai