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P1BS.4 - A Rhodamine Chemodosimeter Bearing Thiourea Moiety for Mercury(II) and Its Bioimaging Application
2018
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A selective rhodamine chemodosimeter RTP was developed for Hg2+ detection based on the Hg2+-promoted intramolecular cyclic guanylation of thiourea linked with o-phenylenediamine as a linker. Upon the addition of Hg2+, a colorless solution of RTP turned pink with a maximum absorption band at 555 nm and with a 62-fold fluorescence enhancement at 578 nm (Φ = 0.34). RTP is significantly selective to Hg2+ among other metal ions with a detection limit of 1.6 nM (0.3 ppb). The membrane-permeable RTP
doi:10.5162/imcs2018/p1bs.4
fatcat:5tdx4zjlxfhrtiih6eam3d6mba