USE OF ELECTROACTIVE THIOLS TO STUDY THE FORMATION AND EXCHANGE OF ALKANETHIOL MONOLAYERS ON GOLD
USE OF ELECTROACTIVE THIOLS TO STUDY THE FORMATION AND EXCHANGE OF ALKANETHIOL MONOLAYERS ON GOLD
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DOI：
10.1021/la00054a029
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发表时间：
1991-06-01
期刊：
影响因子：
3.9
通讯作者：
FOX, MA
中科院分区：
文献类型：
--
作者：
COLLARD, DM;FOX, MA
十六碳硫醇和16-(二茂铁基甲氧基)十六碳硫醇在金表面的混合单层用烷基硫醇溶液处理后，大约三分之一的电活性硫醇被取代。这种交换可以通过循环伏安波的积分来监测。如果这种交换是与第二个电活性硫醇进行的，则来自该物种的信号表示吸附，而原始信号的减弱表示交换过程中的解吸。随后用非电活性硫醇处理三组分单分子膜导致来自第二电活性物种的信号丢失，而不损失原始物种。这些结果与硫醇从缺陷位置交换的结果是一致的，这些硫醇在较长时间内是不移动的。
Treatment of mixed monolayers of hexadecanethiol and 16-(ferrocenylcarbonyloxy)hexadecanethiol on gold with solutions of alkanethiols results in the replacement of approximately one-third of the electroactive thiol. This exchange can be monitored by integration of the cyclic voltammetric wave. If this exchange is carried out with a second electroactive thiol, the signal from this species indicates adsorption, and diminution of the original signal represents desorption during exchange. Subsequent treatment of the three-component monolayer with a nonelectroactive thiol results in loss of the signal from the second electroactive species without loss of the original species. These results are consistent with exchange of thiols from defect sites, which are immobile over extended periods.