Studies on Charge Transfer Across the Micro-liquid/Liquid Interface Supported at a Double-barrel Micropipette

Abstract

Abstract: In this paper, the charge transfer across the micro-liquid/liquid interface supported at the orifice of a double-barrel micropipette, namely, a θ-pipette, is reported.Simple ion transfer(TMA⁺), facilitated ion transfer(potassium ion transfer facilitated by DB₁₈C₆), and electron transfer(ferrocene and ferri/ferrocyanide system) have been investigated by cyclic voltammetry.The experimental results show that a very thin aqueous film, linking both barrels filled with the aqueous solution and the organic solution respectively, can spontaneously be formed on the outer glass surface of such a double-barrel micropipette to construct a micro-liquid/liquid interface, which provides the asymmetry of diffusion field.Such device is demonstrated experimentally which can be employed as one of the simplest electrochemical cells to investigate the charge transfer across the liquid/liquid interface.

Key words: Double-Barrel micropipette, Micro-liquid/liquid interface, Charge transfer, Cyclic voltammetry

CLC Number:

O646

TrendMD:

CHEN Yong, SU Bin, SHAO Yuan-Hua . Studies on Charge Transfer Across the Micro-liquid/Liquid Interface Supported at a Double-barrel Micropipette[J]. Chem. J. Chinese Universities, 2003, 24(10): 1834.

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Studies on Charge Transfer Across the Micro-liquid/Liquid Interface Supported at a Double-barrel Micropipette

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