Sensors for Metal Cations

Interaction of probe 13 with and the corresponding imaging in living cells. (Reproduced by permission of American Chemical Society. ) 

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These results implied that the MPA polymer responded in two different ways to the valence of the cations tested negative Cotton effects for monovalent ions and positive effects for divalent ions, thus behaving as a valence sensor for metal cations. No relationship between ionic radii and the observed selectivity bias was found and, as expected, the enantiomeric polymer [poly-(S )-2] gave the opposite results. 

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