新型基础电解质用于液/液界面电化学研究

New Base Electrolytes for Organic Phase of the Interface between Two Immiscible Electrolyte Soltions and Their Electrochemical Characteristics

用十六烷基三辛基铵四苯硼(CTOATPB),十六烷基三苯基四苯硼(CTTPTPB),四丁基铵二苦胺(TBADPA),四丁基铵雷氏盐(TBARKS)和四丁基铵磷钨酸(TBAPT)五种离子化合物作为两不互溶电解质溶液界面的有机相基础电解质,测定了它们在1,2-二氯乙烷中的缔合常数,研究了它们组成的界面的阻抗行为和由它们确定的电位窗范围.CTOATPB和CTPPTPB的电位窗朝负方向扩展,使用TBATPB无法观察到的Br,Ⅰ和ClO_4的迁移波能够被观察到,能够用来研完强亲水性的阴离子从水相到有机相或强亲脂性的阳离子从有机相到水相的迁移行为,是两种性能优于TBATPB的新型基础电解质溶液.

Five new ion association complexes,cetyltrioctylammonium tetraphenylborate(CTOATPB),cetyltriphenylphosphonium tetraphenylborate(CTPPTPB),tetrabutylammonium diplicrylaminate (TBADPA), tetrabutylammonium Reineckate (TBARKS) and tetrabutylammonium phosphotungstate (TBAPT) have been proposed as base electrolytes for organic phase of the interface of two immiscible electrolyte solutions. Their association constants in 1,2-dichloroethane (DCE) were determined. The impedance behaviors of the interface were desribed.The potential windows of these interfaces were measured.It was found that CTOA^+ and CTPP^+ broaden the potential window range toward more negative values so that the transfer waves of Br,I and ClO_4 can be observed which can not be observed by means of TBATPB base electrolytes for organic phase for study on transfer of hydrophilie cations in opposite direction.