Self-assembly of pyrene boronic acid-based chemodosimeters for highly efficient mercury(II) ion detection. Issue 38 (19th September 2019)

• Record Type: Journal Article
• Authors: Lee, Sun Woo; Lee, Seung Yeob; Lee, Seoung Ho
• Is Part Of: Tetrahedron letters. Volume 60:Issue 38(2019)
• Publication Date: 2019-09-19
• Subjects: Chemodosimeters -- Self-assembly -- Amplified quenching -- Mercury ion sensors; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tetlet.2019.151048
• Languages: English
• ISSNs: 0040-4039

Abstract

Graphical abstract: Highlights: A self-assembled system capable of sensitively detecting Hg 2+ ions was devised. Self-assembly of chemodosimeters provides both high selectivity and sensitivity. Amplified fluorescence quenching is induced through self-assembly of chemodosimeters. A self-assembled chemodosimerter is a useful tool for practical conditions. Abstract: A new chemodosimeter consisting of pyrene and boronic acid (1 ) for the detection of Hg 2+ ions is described. The amphiphilic nature of1 leads to self-assembly in aqueous solution and the high electron density throughout the aggregated pyrene units provides an outstanding platform for energy and electron transport. Self-assembled1 exhibits a selective and sensitive fluorescence response to Hg 2+ ions, where the Hg 2+ ion allows a fast transmetallation of1, which drastically reduces its fluorescence. The Stern-Volmer (SV) quenching constant for the fluorescence quenching of self-assembled1 by Hg 2+ ions is approximately 1.8 × 10 6 M −1, and Hg 2+ ions can be sensed with a detection limit of 6.6 × 10 −9 M. In addition, self-assembled1 exhibits excellent sensing performance at nano-molar concentration levels for Hg 2+ ion contamination of tap water, fresh water, and seawater.