文献类型：期刊文献

英文题名：pH-Response Mechanism of a Redox Reaction between Silver Ions and Hydroquinone

作者：Xie, Tao[1,2];Jing, Chao[1,2];Li, Meng[1,2,3];Ma, Wei[1,2];Ding, Zhifeng[4];Long, Yi-Tao[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Environm Protect Key Lab Risk Assessment &, Shanghai 200237, Peoples R China;[4]Univ Western Ontario, Dept Chem, 1151 Richmond St, London, ON N6A 5B7, Canada

年份：2016

卷号：120

期号：40

起止页码：23104

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;EI(收录号：20164302936755);WOS:【SCI-EXPANDED(收录号:WOS:000385607000037)】；

基金：This research was supported by the National Natural Science Foundation of China (21327807, 21421004) and the Programme of Introducing Talents of Discipline to Universities (B16017).

语种：英文

外文关键词：Gold nanoparticles - Phenols - Reaction kinetics - Fiber optic sensors - Transmission electron microscopy - Diagnosis - Metal nanoparticles - Density functional theory - Metal ions

摘要：Studying chemical reactions at the nanoscale level could aid to better understand and control reaction processes. In this paper, the redox reaction between hydroquinone and Ag+ via gold nanoparticles as a suitable surface was taken as an example, where its thermochemical values were computed by using density functional theory (DFT) methods with the 6-31G(d) basis set. The calculated results exhibited that the reaction kinetics was related to pH values and concluded as three different kinds of processes. Assisted by the gold nanoparticles, we tracked the reduction of Ag+ in real time by plasmon resonance Rayleigh scattering spectroscopy and dark-field microscopy. Moreover, discrete dipole approximation and transmission electron microscope images were also conducted, and the calculated results were in good agreement with the experimental ones. In addition, we utilized the pH response of the redox reaction to distinguish cancer cells from the normal ones, which showed promising applications in promoting the development of disease diagnosis.