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Mediated Electron Transfer Across Supported Bilayer Lipid Membrane with TCNQ‐Based Organometallic Compounds
Author(s) -
Qu Meili,
Lv Qiying,
Yang Bing,
Zhang Weide,
Zhang Jiaqi,
Zhan Shuzhong,
Ye Jianshan
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200900349
Subject(s) - cyclic voltammetry , tetracyanoquinodimethane , monolayer , electron transfer , bilayer , chemistry , lipid bilayer , membrane , electrochemistry , dielectric spectroscopy , crystallography , photochemistry , electrode , organic chemistry , molecule , biochemistry
Supported bilayer lipid membrane (s‐BLM) containing one‐dimensional compound 1, TCNQ‐based (TCNQ=7,7,8,8‐tetracyanoquinodimethane) organometallic compound {(Cu 2 (μ‐Cl)(μ‐dppm) 2 )(μ 2 ‐TCNQ)} ∞ , was prepared and characterized on the self‐assembled monolayer (SAM) of 1‐octadecylmercaptan (C 18 H 37 SH) deposited onto Au electrode. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results showed that the compound 1, dotted inside s‐BLM, can act as mediator for electron transfer across the membrane. Two redox peaks and the charge‐transfer resistance of 400 kΩ were observed for compound 1 inside s‐BLM. The mechanism of the electron transfer across s‐BLM by TCNQ is by electron hopping while TCNQ‐based organometallic compound is by conducting. Further conclusion drawn from this finding is that the TCNQ‐based organometallic compound embedded inside s‐BLM exhibits excellent electron transfer ability than that of free TCNQ. This opens a new path for the development of s‐BLM sensor and/or biosensor by incorporation with TCNQ‐based organometallic compounds.