Uematsu Kohei, Iwai Yusuke, Nara Yuki, Tanaka Minato, Katano Hajime
Department of Bioscience and Biotechnology, Fukui Prefectural University, Eiheiji, Fukui, 910-1195, Japan.
Anal Sci. 2025 May 23. doi: 10.1007/s44211-025-00793-x.
Ion-transfer reactions at the supported fluorous liquid membrane (SFLM) | water (W) interface were examined using cyclic voltammetry. The SFLM was constructed by impregnating a polytetrafluoroethylene or polyvinylidene fluoride microporous filter with a fluorous solvent, 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether (OFE). Various ions, including tetraphenylarsonium and tetraphenylborate, exhibited nearly reversible voltammetric waves for the ion-transfer reaction at the SFLM | W interface, enabling the determination of formal ion-transfer potentials. The formal Gibbs transfer energies calculated from these potentials were in good agreement with those determined from the conventional OFE | W interface, particularly when the polytetrafluoroethylene membrane was used. This indicates that the fluorophilic property of OFE was maintained in the SFLM. The supported liquid membrane is an effective means of providing a liquid | liquid interface with mechanical stability and ease of handling. Additionally, it enables a marked reduction in the volume of the expensive fluorous solvent required for electrochemical measurements. Therefore, the SFLM system is advantageous for liquid | liquid electrochemical studies and applications using fluorous solvents.
使用循环伏安法研究了支撑氟代液膜（SFLM）|水（W）界面处的离子转移反应。通过用氟代溶剂1H，1H，5H-八氟戊基-1，1，2，2-四氟乙基醚（OFE）浸渍聚四氟乙烯或聚偏二氟乙烯微孔滤膜来构建SFLM。包括四苯基砷鎓和四苯基硼酸盐在内的各种离子在SFLM|W界面处的离子转移反应中表现出近乎可逆的伏安波，从而能够测定形式离子转移电位。由这些电位计算出的形式吉布斯转移能与从传统的OFE|W界面测定的结果非常吻合，特别是在使用聚四氟乙烯膜时。这表明OFE的亲氟性在SFLM中得以保持。支撑液膜是提供具有机械稳定性且易于处理的液|液界面的有效手段。此外，它能够显著减少电化学测量所需的昂贵氟代溶剂的用量。因此，SFLM系统对于使用氟代溶剂的液|液电化学研究和应用具有优势。
