N,N'-二甲基甲酰胺钝化的黑磷量子点的电化学发光

Electrochemiluminescence of ,'-Dimethylformamide Passivated Black Phosphorus Quantum Dots.

作者信息

He Shuijian, Li Weihan, Li Minsi, Liu Zhenlu, Sun Xueliang, Ding Zhifeng

机构信息

Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.

Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada.

出版信息

Langmuir. 2024 Dec 31;40(52):27279-27285. doi: 10.1021/acs.langmuir.4c03095. Epub 2024 Dec 19.

DOI:10.1021/acs.langmuir.4c03095

PMID:39700330

Abstract

Black phosphorus quantum dots (BPQDs) have shown promising applications in biosensors and energy storage devices. However, the electrochemiluminescence (ECL) properties of pristine BPQDs in an organic system have rarely been reported. In this paper, ,'-dimethylformamide passivated BPQDs with a small size of 2.3 nm were obtained by an ultrasonication-assisted liquid exfoliation process, and their ECL properties of BPQDs were studied. A reversible reduction peak was recorded by differential pulse voltammetry, while no apparent oxidation peak was observed. ECL signal was not seen in the annihilation route. Persulfate was proved to be an effective coreactant and yellow emission was observed which was greatly red-shifted in comparison to that of photoluminescence. ECL of BPQDs is believed to be generated from both the surface states and electron promotion over their band gap.

摘要

黑磷量子点（BPQDs）在生物传感器和能量存储设备中已展现出有前景的应用。然而，原始BPQDs在有机体系中的电化学发光（ECL）性质鲜有报道。本文通过超声辅助液体剥离法制备了尺寸小至2.3 nm的N，N'-二甲基甲酰胺钝化BPQDs，并研究了其ECL性质。采用差分脉冲伏安法记录到一个可逆还原峰，而未观察到明显的氧化峰。在湮灭途径中未检测到ECL信号。过硫酸盐被证明是一种有效的共反应剂，并且观察到黄色发射，与光致发光相比发生了极大的红移。BPQDs的ECL被认为是由表面态以及其带隙上的电子跃迁产生的。