Details

Autor(en) / Beteiligte

• López-Alled, Carlos M
• Murfin, Lloyd C
• Kociok-Köhn, Gabriele
• James, Tony D
• Wenk, Jannis
• Lewis, Simon E

Titel

Colorimetric detection of Hg with an azulene-containing chemodosimeter dithioacetal hydrolysis

Ist Teil von

• Analyst (London), 2020-09, Vol.145 (19), p.6262-6269

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Azulene is a bicyclic aromatic chromophore that absorbs in the visible region. Its absorption maximum undergoes a hypsochromic shift if a conjugated electron-withdrawing group is introduced at the C1 position. This fact can be exploited in the design of a colorimetric chemodosimeter that functions by the transformation of a dithioacetal to the corresponding aldehyde upon exposure to Hg 2+ ions. This chemodosimeter exhibits good chemoselectivity over other metal cations, and responds with an unambiguous colour change clearly visible to the naked eye. Its synthesis is concise and its ease of use makes it appropriate in resource-constrained environments, for example in determing mercury content of drinking water sources in the developing world. A simple azulene-dithiane gives a selective colorimetric response to mercury( ii ) in both mixed and purely aqueous solvent, which is clearly visible to the human eye.