Formation of a self-assembled monolayer of 2-mercapto-3-n-octylthiophene on gold
文献类型：期刊论文
| 作者 | Peng ZQ ; Dong SJ |
| 刊名 | langmuir
 |
| 出版日期 | 2001 |
| 卷号 | 17期号:16页码:4904-4909 |
| 关键词 | TETRADENTATE LIGAND MONOLAYERS SURFACE-CONFINED MONOLAYERS THIOL COATED ELECTRODES PHASE PROBE MOLECULES OMEGA-HYDROXY THIOL STRUCTURAL CHARACTERIZATION ORGANOMERCAPTAN MONOLAYERS ELECTROCHEMICAL PROPERTIES IMPEDANCE SPECTROSCOPY ORGANIC-SURFACES |
| ISSN号 | 0743-7463 |
| 通讯作者 | dong sj |
| 中文摘要 | monolayer assembly of 2-mercapto-3-n-octylthiophene (mot) having a relatively large headgroup onto gold surface from its dilute ethanolic solutions has been investigated by electrochemistry. an electrochemical capacitance measurement on the permeability of the monolayer to aqueous ions, as compared with its alkanethiol counterpart [ch3(ch2)(9)sh (dt)] with a similar molecular length, shows that the self-assembled monolayers (sams) of mot can be penetrated by aqueous ions to some extent. furthermore, organic molecular probes, such as dopamine, can sufficiently diffuse into the monolayer because a diffusion-limited current peak is observed when the dopamine oxidation reaction takes place, showing that the monolayer is loosely packed or dominated by defects. but the results of electron transfer to aqueous redox probes (including voltammetry in fe(cn)(6)(3-/4-) solutions and electrochemical ac impedance spectrum) confirm that the monolayer can passivate the gold electrode surface effectively for its very low ratio of pinhole defects. moreover, a heterogeneous patching process involving addition of the surfactants into the sams provides a mixed or hybrid membrane that has superior passivating properties. these studies show that the mot monolayer on the electrode can provide an excellent barrier for hydrated ionic probe penetration but cannot resist the organic species penetration effectively. the unusual properties of the sams are attributed to the entity of the relatively large thiophene moiety between the carbon chain and the thiol group. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000170305200035 |
| 公开日期 | 2010-11-04 |
| 源URL | [http://202.98.16.49/handle/322003/20659]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Peng ZQ,Dong SJ. Formation of a self-assembled monolayer of 2-mercapto-3-n-octylthiophene on gold[J]. langmuir,2001,17(16):4904-4909. |
| APA | Peng ZQ,&Dong SJ.(2001).Formation of a self-assembled monolayer of 2-mercapto-3-n-octylthiophene on gold.langmuir,17(16),4904-4909. |
| MLA | Peng ZQ,et al."Formation of a self-assembled monolayer of 2-mercapto-3-n-octylthiophene on gold".langmuir 17.16(2001):4904-4909. |
入库方式： OAI收割
来源：长春应用化学研究所
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