Rational designed strategy to dispel mutual interference of mercuric and ferric ions towards robust, pH-stable fluorescent carbon nanodots. Issue 7 (20th March 2017)

• Record Type: Journal Article
• Authors: Liu, Yang; Liu, Yanan; Lee, Jinpyo; Lee, Joong Hee; Park, Mira; Kim, Hak Yong
• Is Part Of: Analyst. Volume 142:Issue 7(2017)
• Page Start: 1149
• Page End: 1156
• Publication Date: 2017-03-20
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/c6an02601j
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : C-dots based stable and recoverable sensing platform with switchable selectivity for Hg 2+ and Fe 3+ was rationally designed. Abstract : As one of the most promising fluorometric nanosensors for metal ion sensing, carbon nanodots (C-dots) have developed rapidly in recent years. However, it is still a thorny problem to shield the mutual interference of two metal ions towards C-dots, e.g., Hg 2+ and Fe 3+ ions. In the present work, we propose rational routes for the unique interaction between C-dots and Hg 2+ or Fe 3+ . The selectivity of the as-obtained label-free C-dots can be effectively switched by P3 O10 5− and SCN − . The resultant C-dots possess superior photoluminescence intensity stability in a wide pH range or in certain redox circumstances, which are highly preferred in terms of practical metal-ion detection. Moreover, the quenching–recovery–regeneration performances and quenching mechanisms were also investigated. Based on this stable and recoverable sensing platform, this in-depth study for dispelling interference from Hg 2+ and Fe 3+ ions may open up a new paradigm for developing potential detection of multi-metal ions using C-dots with switchable selectivity.