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四氯苯醌自组装膜电子传递机制的研究

Electron Transfer Mechanism Characteristics of 2,3,5,6-tetrachloride-quinone Anchored on the Self-assembled Monolayers of Dithiol

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【作者】 侯士峰杨可盛方惠群陈洪渊

【Author】 Hou Shifeng;Yang Kesheng;Fang Huiqun;Chen Hongyuan(Department of Chemistry, Nanjing University Nanjing 210093)

【机构】 南京大学化学系!南京210093

【Abstract】 2,3,5,6-Tetrachloride-quinone was anchored to a gold surfare through the self-assem-bled monolayers of dithiol [DT HS-(CH2).-SH n=2,4,6,8,10]. The surface coverage of the anchoredTQ was esteminated to be 4.0 ×10-11 mol’cm-2. The electron transfer rate constant Ket associatedwith the redox process of anchored film decreased from 6.75 s-1 at n=2 to 0.169 s-1 at n=10 withincreasing the chain length of the DT SAMs througth the redox potential of TQ. The turnningbarrier conefficient.(β) of the electron transfer was estimated to be 0.82A-1 from the observed linearrelationship between the Ket and the monolayer chain length.

【基金】 国家自然科学基金;江苏省自然科学基金
  • 【文献出处】 物理化学学报 ,ACTA PHYSICO-CHIMICA SINICA , 编辑部邮箱 ,1998年07期
  • 【分类号】O625
  • 【被引频次】9
  • 【下载频次】86
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