Pengjia Zhang, Zhenjie Xue, Dan Luo, Wei Yu, Zhihui Guo, Tie Wang
2014/6/17
Analytical chemistry
86
12
ページ
5620-5623
American Chemical Society
Carbon dots (CDs) have rigorously been investigated on their unique fluorescent properties but rarely their electrogenerated chemiluminescence (ECL) behavior. We are here to report a dual-peak ECL system of CDs, one at −2.84 V (ECL-1) and the other at −1.71 V (ECL-2) during the cyclic sweep between −3.0 and 3.0 V at scan rate of 0.2 V s–1 in 0.1 M tetrabutyl ammonium bromide (TBAB) ethanol solution, which is more efficiency to distinguish metallic ions than single-peak ECL. The electron transfer reaction between individual electrochemically reduced nanocrystal species and coreactants led to ECL-1, in which the electron injected to the conduction band of CDs in the cathodic process. Ion annihilation reactions induced direct formation of exciplexes that produced another ECL signal, ECL-2. ECL-1 showed higher sensitivity to the surrounding environment than ECL-2 and thus was used for ECL detection of …
Scholar の論文
P Zhang, Z Xue, D Luo, W Yu, Z Guo, T Wang - Analytical chemistry, 2014