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Utilizing 2-vinylthiophene as the starting material, the thienyl-containing aza-BODIPY 1 was successfully prepared. Aza-BODIPY 1 absorbs at 760 nm and emits at 782 nm in CHCl3 in NIR region. Aza-BODIPY 1 as a NIR turn-off chemosensor was highly selective to Hg2+. The fluorescence quenching is due to that the electrons from the thienyl groups to the aza-BODIPY core were transferred after binding with...
The phosphorus-containing PODIPY 1 as a chemosensor can detect Hg2+ by a color change from pink to violet red without the use of any instrumentation. PODIPY 1 was selective to Hg2+ with a remarkable absorption change, and addition of other relevant metal ions caused almost no absorption change. The new PODIPY dye 1 was sensitive to various concentrations of Hg2+. The energy gap between the HOMO and...
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