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|Title:||Rhodamine derivative-modified filter papers for colorimetric and fluorescent detection of Hg2+ in aqueous media|
|Source:||Xu, L.Q., Neoh, K.-G., Kang, E.-T., Fu, G.D. (2013-02-21). Rhodamine derivative-modified filter papers for colorimetric and fluorescent detection of Hg2+ in aqueous media. Journal of Materials Chemistry A 1 (7) : 2526-2532. ScholarBank@NUS Repository. https://doi.org/10.1039/c2ta01072k|
|Abstract:||Mercury pollution is a widespread problem. In this work, a solid-state sensor based on rhodamine derivative-modified cellulose filter papers for detection of Hg2+ ions in aqueous media is demonstrated. A three-step approach, involving the introduction of atom transfer radical polymerization (ATRP) initiating sites, surface-initiated ATRP (SI-ATRP) of pentafluorophenyl methacrylate, and post-functionalization of the reactive surface with amino-containing spirolactam rhodamine derivatives in ester-amine reaction, was developed for the covalent immobilization of mercury-responsive probes on the cellulose filter paper. This solid-state sensor exhibits highly selective recognition of Hg2+ ions in a Tris-HNO3 buffer solution (pH = 7.24) over various environmentally relevant metal ions with remarkably enhanced fluorescent emission intensity and distinct color change from colorless to pink. The response of a rhodamine derivative-modified cellulose filter paper to Hg2+ ions is fast (|
|Source Title:||Journal of Materials Chemistry A|
|Appears in Collections:||Staff Publications|
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