One-pot synthesis of highly greenish-yellow fluorescent nitrogen-doped graphene quantum dots for pyrophosphate sensing via competitive coordination with Eu(3+) ions

Nanoscale
Liping LinXi Chen

Abstract

Highly fluorescent nitrogen-doped graphene quantum dots (N-GQDs) with greenish-yellow emission and quantum yield of 13.2% have been synthesized via a one-pot hydrothermal method. The obtained N-GQDs displayed excellent optical properties, high photostability and resistance to strong ion strength. Based on the higher affinity of pyrophosphate (PPi) than carboxyl and amido groups on the surface of the N-GQDs to Eu(3+), a Eu(3+)-modulated N-GQD off-on fluorescent probe for PPi detection was constructed with a detection limit of 0.074 μM. The detection process was simple in design, easy to operate, and showed a highly selective response to PPi in the presence of co-existing anions. This work widens the applications of N-GQDs with versatile functionality and reactivity in clinical diagnostics and as biosensors.

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Citations

Oct 2, 2020·Nanoscale·Qian GuoAna Belen Jorge
May 28, 2018·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xin HaiJianhua Wang
Jul 7, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Keheng LiGang Wei
May 21, 2016·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Fanping ShiXingguang Su
Aug 26, 2018·Mikrochimica Acta·Yasamin Nasiri Khonsari, Shiguo Sun
Mar 28, 2018·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Zhong-Xia WangWei Wang
Aug 28, 2018·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Vikas Kumar SinghSyed Hadi Hasan
Apr 12, 2021·Journal of Pediatric Surgery·You-Sheng LinKuen-Song Lin
Dec 19, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Haoguang HuangXiaoming Xie
Jun 24, 2020·ACS Applied Materials & Interfaces·Van Dien DangRuey-An Doong

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