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. Author manuscript; available in PMC: 2013 May 9.
Published in final edited form as: J Am Chem Soc. 2012 May 1;134(18):7773–7779. doi: 10.1021/ja212138e

Figure 1.

Figure 1

The PS-mediated Cu2+ quenching reaction. At basic pH values, Cu2+ binds to 2 PS molecules and quenches nearby fluorophores (red to black in the diagram). The reaction can be reversed by lowering the pH.