Jump to main content
Jump to site search


Binding enabled catalytic activation of SO2 by copper koneramine complexes under ambient conditions

Author affiliations

Abstract

Reported is an unprecedented, simple and sustainable strategy to catalytically convert SO2 gas into sulfate dianions under ambient conditions utilizing ferrocene (SO2 + 2Fc + aerial O2 → Fc2SO4) and aerial oxygen, whereby ferrocenium sulfate was formed without any unwanted byproducts. The frequent urban haze and increase in respiratory health issues connected to the atmospheric SO2 concentration attracted interest in the sequestration and valorization of SO2. Even though a number of methods have been reported in the past decade for the stoichiometric sequestration and activation of SO2, effective catalytic activation of SO2 through homogeneous catalysis has not been realized before. The copper(II) koneramine complex [Cu(L-H)Cl2] was designed to have exclusive basic sites for SO2 binding, which complemented efficient electron transfer from ferrocene to SO2 that underwent S-oxygenation to yield sulfate dianions. In this proof of concept study, SO2 binding coupled electron transfer (SOCET) from ferrocene was established with the assistance of control experiments, electronic absorption spectroscopy, cyclic voltammetry and electrospray ionization mass spectrometry.

Graphical abstract: Binding enabled catalytic activation of SO2 by copper koneramine complexes under ambient conditions

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Jul 2019, accepted on 10 Oct 2019 and first published on 14 Oct 2019


Article type: Paper
DOI: 10.1039/C9GC02647A
Green Chem., 2019, Advance Article

  •   Request permissions

    Binding enabled catalytic activation of SO2 by copper koneramine complexes under ambient conditions

    M. Chahal, S. Raje, G. Kotana and R. Angamuthu, Green Chem., 2019, Advance Article , DOI: 10.1039/C9GC02647A

Search articles by author

Spotlight

Advertisements