FRET-based rhodamine–coumarin conjugate as a Fe3+ selective ratiometric fluorescent sensor in aqueous media. Issue 35 (26th August 2015)

• Record Type: Journal Article
• Authors: Qin, Jing-can; Yang, Zheng-yin; Wang, Guan-qun; Li, Chao-rui
• Is Part Of: Tetrahedron letters. Volume 56:Issue 35(2015)
• Page Start: 5024
• Page End: 5029
• Publication Date: 2015-08-26
• Subjects: Fluorescent sensor -- Ratiometric -- Rhodamine/coumarin -- Fe3+ -- FRET; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tetlet.2015.07.023
• Languages: English
• ISSNs: 0040-4039

Abstract

Graphical abstract: Highlights: The novel fluorescent probe (HL) responds to Al 3+ . HL shows remarkable fluorescence enhancement in the presence of Fe 3+ in aqueous media. The sensing mechanism is attributed to an FRET mechanism from coumarin to Rhodamine 6G. Abstract: In this study, a novel ratiometric fluorescent sensor (HL) for Fe 3+ based on the conjugation of rhodamine and coumarin has been designed and synthesized. The free sensor displays fluorescence emission at 475 nm, on the addition of Fe 3+ to an aqueous solution of HL, the sensor shows significant fluorescence enhancement at 550 nm which should be attributed to an intramolecular fluorescence resonance energy transfer (FRET) mechanism from coumarin to Rhodamine 6G.