Interaction of imidazolium-based room-temperature ionic liquids with DOPC phospholipid monolayers: electrochemical study.

Interaction of imidazolium-based room-temperature ionic liquids with DOPC phospholipid monolayers: electrochemical study.
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咪唑基室温离子液体与 DOPC 磷脂单层的相互作用:电化学研究。

DOI:
10.1021/la400923d
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发表时间:
2013
期刊:
the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Galluzzi M
Galluzzi M
中科院分区:
--
文献类型:
--
作者:
Galluzzi M

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为了测试室温离子液体的生物相容性,研究了不同离子液体与生物膜(生物膜)模型的相互作用。双油酰磷脂酰胆碱(DOPC)吸附在汞电极上,形成无缺陷的非渗透性单分子膜,是一种易于用电化学技术研究的生物膜模型。我们用快速循环伏安法(RCV)、交流伏安法(ACV)和电化学阻抗谱(EIS)监测了离子液体对汞支撑单分子膜的修饰。研究了一系列咪唑类离子液体的相互作用,突出了阴离子和阳离子侧链在与DOPC单分子膜相互作用中的作用。结果表明,IL阳离子的疏水性和亲油性是导致这种相互作用的主要因素。HG支持的单分子膜提供了对ILS在生物膜界面上的行为的准确分析,从而导致对所涉及的相互作用机制的全面理解。同时,通过文献体内毒性数据与本研究数据的相关性表明,汞磷脂模型是一种有效的毒性传感技术。
To test the biocompatible character of room-temperature ionic liquids (ILs), the interaction of various ILs with biological membrane (biomembrane) models was studied in this work. Dioleoyl phosphatidylcholine (DOPC) adsorbed on a mercury (Hg) electrode forms an impermeable defect-free monolayer which is a well established biomembrane model, prone to be studied by electrochemical techniques. We have monitored the modifications of the Hg supported monolayer caused by ILs using rapid cyclic voltammetry (RCV), alternating current voltammetry (ACV), and electrochemical impedance spectroscopy (EIS). A series of imidazolium-based ILs were investigated whose interaction highlighted the role of anion and lateral side chain of cation during the interaction with DOPC monolayers. It was shown that the hydrophobic and lipophilic character of the IL cations is a primary factor responsible for this interaction. Hg-supported monolayers provide an accurate analysis of the behavior of ILs at the interface of a biomembrane leading to a comprehensive understanding of the interaction mechanisms involved. At the same time, these experiments show that the Hg-phospholipid model is an effective toxicity sensing technique as shown by the correlation between literature in vivo toxicity data and the data from this study.
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