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Differentiate bisulfite from sulfite by a new cycloruthenated 2-(2-thienyl)pyridine complex in pure water

Publication date:

August 2018


Source:Inorganic Chemistry Communications, Volume 94

Author(s): Chaoyi Xie, Kang Du, Meng Xie, Fan Lv, Xianghong Li, Dingguo Tang

A new cycloruthenated 2-(2-thienyl)pyridine complex (1) with a benzo[e]indolium block was successfully synthesized and characterized, which has good water-solubility and displays a maximum absorption band centered at 730 nm (ε = 6.3 × 103 M−1 cm−1) in water. Moreover, its absorption edge can extend to 1000 nm. When either HSO3 or SO3 2– ions were added to the buffer solutions of 1, obvious color changes from dark-red to purplish-red were observed. However, it is noticeable that the addition of HSO3 ions resulted in the solution color of this complex changing from dark-red to colorless other than purplish-red. The different solution color changes displayed that 1 can be used as an optical chemo-sensor to distinguish HSO3 from SO3 2– in pure water.
Graphical abstract




Authors:   Author(s): Chaoyi Xie, Kang Du, Meng Xie, Fan Lv, Xianghong Li, Dingguo Tang
Journal:   Inorganic Chemistry Communications
Year:   2018
Publication date:   03-Jun-2018
Facts, background information, dossiers
  • ions
  • absorption
  • pyridine
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