锰（II）增强荧光氮掺杂石墨烯量子点：一种简便高效的合成方法及其在生物成像和汞离子检测中的应用

Manganese(ii) enhanced fluorescent nitrogen-doped graphene quantum dots: a facile and efficient synthesis and their applications for bioimaging and detection of Hg ions.

作者信息

Yang Li, Qin Aimiao, Chen Shuoping, Liao Lei, Qin Jiangke, Zhang Kaiyou

机构信息

Key Lab New Processing Technology for Nonferrous Metals & Materials, Ministry of Education, Guangxi Key Laboratory in Universities of Clean Metallurgy and Comprehensive Utilization for Non-ferrous Metals Resources, College of Materials Science & Engineering, Guilin University of Technology Guilin China

College of Chemistry and Pharmaceutical Science, Guangxi Normal University Guilin China.

出版信息

RSC Adv. 2018 Feb 6;8(11):5902-5911. doi: 10.1039/c7ra12133d. eCollection 2018 Feb 2.

Manganese ion (Mn) bonded nitrogen-doped graphene quantum dots (Mn(ii)-NGQDs) with water solubility have been successfully synthesized by a simple, one-pot hydrothermal carbonization, using sodium citrate, glycine and manganese chloride as raw materials. The photoluminescence (PL) characteristics of Mn(ii)-NGQDs were studied in detail. The resulting Mn(ii)-NGQDs show a remarkably enhanced PL intensity and quantum yield (QY = 42.16%) compared with the product without Mn(ii)-doped (named as NG, QY = 27.06%) and the product doped with other metal ions. The Mn(ii)-NGQDs not only display low toxicity and high cellular uptake efficiency for fluorescence live cell imaging in biological evaluations but also exhibit a fast, highly selective and sensitive fluorescence quenching effect toward Hg ions, with a detection limit of 3.4 × 10 mol L.