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

作者：Xie, Chaoyi; Du, Kang; Xie, Meng; Lv, Fan; Li, Xianghong^*; Tang, Dingguo

来源：Inorganic Chemistry Communications, 2018, 94: 10-14.

DOI：10.1016/j.inoche.2018.05.032

• Benzo[e]indolium
• Sulfite
• Bisulfite
• 2-(2-thienyl)pyridine
• Cycloruthenated complex
• Colorimetric detection

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 (epsilon = 6.3 x 10(3)M(-1) cm(-1)) in water. Moreover, its absorption edge can extend to 1000 nm. When either HSO3- or SO32- 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 SO32- in pure water.

• 出版日期2018-8
• 单位中南民族大学