Ion transfer across a phospholipid monolayer adsorbed at the water∣1,2-dichloroethane interface under surface pressure control

The complex formation of ions with a phospholipid monolayer adsorbed at an aqueous|1,2-dichloroethane interface

“…8(b). Grandell et al have reported that the transfer of picrate shifted to a more negative potential in the presence of PC [23].…”

Blocking effect of a phospholipid monolayer on ion transfer at a liquid | liquid interface and its electrochemical control

“…Besides the studies mentioned above, the ion transfer across a lipid monolayer at a liquid j liquid interface has been investigated [8,9], but an extreme decrease of voltammetric current has scarcely been reported except for a few examples where the voltammetric current for the K þ transfer facilitated by valinomycin disappeared almost completely at the interface of W and 1,2-dichloroethane, DCE. Cunnane et al [10] added 6.5 Â 10 À5 M ( ¼ mol dm À3 ) egg yolk lecithin to the DCE phase, and Chesniuk et al [11] injected a portion of 0.01 M dibehenoyl phosphatidylcholine solution near the interface to prepare the PC monolayer.…”

Electrochemical Properties of Phospholipid Monolayers at Liquid–Liquid Interfaces

“…[14,33,34] This system also allowed the monitoring of the transfer rate of two probe ions, such cationic propranolol and anionic picrate, in the presence of the lipid monolayer. [33] While this method allowed the surface pressure of the lipid monolayer to be controlled, it suffered from some limitations.…”

“…[22,23] In the study of ion/drug transfer across a lipid monolayer, electrochemical methodology becomes more convenient than Langmuir techniques. [14,19,22,23,[33][34][35] When a potential difference is applied to the ITIES, the charge is separated across the ITIES through the formation of electrical doublelayers, [3] which are affected by the presence of phospholipid monolayers [14,15,36] that in turn affect the ion transfer rate. In Figure 1 b is depicted an interfacial interaction at the ITIES via calcium ions between a phospholipid monolayer deposited in an organic phase and a polysaccharide chain (dextran sulfate, DS) deposited in an aqueous phase.…”