Protonated dinitromerocyanine

Frequency of the crystal after addition of the DNP-Ab to the dinitrospiropyran (31a)-functionalized crystal. (O) Frequency of the crystal after photoisomerization of the (31a)/DNP-Ab monolayer to the protonated dinitromerocyanine (31b), washing offof the DNP-Ab, and back isomerization to (31a) monolayer state. 

FIG. 7.37 (A) Cyclic voltainmograms of (a) The dinitrospiropyran-tediered GOx monolayer dec-trode. (b) The protonated dinitromerocyanine-tethered GOx monol r electrode, (c) The dinftro-spiropyran-tethered GOx monolayer electrode in the presence of the DNP-Ab. Data were recorded in the presence of ferrocene-carboxylic acid 4x 10 M, as diffusionai electron mediator and jocose, 5 X 10" M, scan rate 2 mV seer. (B) Biphasic switchable amperometric transduction of photonic si ls recorded by the photoisomerizable-GOx/DNP-Ab system ( ) The electrode in the dinitrospiropyran-GOx state. ( ) The electrode in the protonated dinitromerocyanine-state. (A) The electrode in the presence of the dinitrospiropyiwi-GOx monolayer with associated DNP-Ab. (Adapted from r rence 143, Figures I and 3. Reproduced by permission ofThe Royal Society of C3iemlstry.)... 

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