Acid-Base Equilibrium between Phenoxyl-Nitronyl Nitroxide Biradical and Closed-Shell Cation. A Magnetic pH Sensor

摘要

In summary, the acid-base pair (2 and 3) with different spin multiplicities can be prepared independently by the oxidation of the parent phenol 1, and they are shown to be interconvertible in solution, which may provide a basis for novel magnetic switching devices or sensors for pH monitoring.