期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 142, 期 3, 页码 1222-1226出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b12833
关键词
-
资金
- Natural Science Foundation of China [21874117, 21575126]
- Zhejiang Provincial Natural Science Foundation [LZ18B050001]
Here we report an electrochemiluminescence (ECL) self-interference spectroscopy technique (designated as ECLIS) with spatial resolution in the normal direction of the electrode surface. Self-interference principally originates from the superposition of ECL emitted directly by luminophores and that reflected from electrode surfaces, resulting in a spectrum consisting of orderly distributed peaks. On the basis of this spectrum and theoretical analysis by the matrix propagation model, the distance between luminophores and the electrode surface can be probed with a vertical resolution on the nanometer scale. We demonstrated first in this work that the height of ECL luminophores assembled on the electrode surface using different molecular linkers, such as double-stranded DNA, could be determined, as well as the possible conformation of linker molecules at the surface. Moreover, the thickness of the ECL emitting layer adjacent to the electrode surface was estimated for the classical coreactant ECL systems involving freely diffusing Ru(bpy)(3)(2+) and tri-n-propylamine in solutions. The thickness was found to vary from similar to 350 nm to nearly 1 mu m depending on the concentration of Ru(bpy)(3)(2+). We believe that ECLIS with a high vertical resolution will provide an easy way to collect molecular conformation information and study ECL reaction mechanisms at electrode interfaces.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据