A Switchable Ferrocene-Based [1]Rotaxane with an Electrochemical Signal Output
摘要:
A [1]rotaxane, in which a linear rod is attached to one cyclopentadienyl (Cp) ring of a ferrocene unit and threaded into a dibenzo-24-crown-8 connected to the other Cp ring, was prepared. The mechanical motion of the rod-like part relative to the macrocycle has been demonstrated using H-1 NMR spectroscopy. Cyclic voltammetry (CV) showed that the system can be chemically switched between electrochemically reversible and irreversible states, depending on the inclusion and exclusion of the ammonium/amine group from the macrocycle.
A Switchable Ferrocene-Based [1]Rotaxane with an Electrochemical Signal Output
摘要:
A [1]rotaxane, in which a linear rod is attached to one cyclopentadienyl (Cp) ring of a ferrocene unit and threaded into a dibenzo-24-crown-8 connected to the other Cp ring, was prepared. The mechanical motion of the rod-like part relative to the macrocycle has been demonstrated using H-1 NMR spectroscopy. Cyclic voltammetry (CV) showed that the system can be chemically switched between electrochemically reversible and irreversible states, depending on the inclusion and exclusion of the ammonium/amine group from the macrocycle.
We report the operation of a ferrocene-based bistable [1]rotaxane that can work in two parallel platforms. In an "active" signal mode, the relative mechanical movement of its ring and thread In response to external acid-base-stimuli can result in a remarkable fluorescence signal output observed by the naked eye, whereas no obvious fluorescence change occurred In a "silent" signal mode after oxidation. Its fluorescence responses to the different combinations of DBU and/or Fe(CIO4)(3) corresponds to an INHIBIT logic gate.