Light Dependent Ion Transport Channel Based On Diarylethene Compounds Containing Fluorine

Diarylethenes have shown great promise as new materials for optoelectronic devices and molecular switches due to a high conversion efficiency of reversible photochromic reactivity, excellent thermal stability of both isomers and good fatigue resistance. The diarylethene derivatives have two isomers under the irradiation of the visible and ultraviolet, two supramolecular structures can be built by the two different morphologies.the order of the Ion "channel"can change by the morphologies of the two supramolecular structures to achieve the purpose of regulating ion transport.In the present dissertation, three diarylethene compounds were synthesized, two of which were synthesized for the first time. As novel photoelectrochromic materials, the compounds have special properties. The charactertistic photochemical and photophysical properties in solutions were researched in the second part of the dissertation.In the third part, the self-assembling behavior of the three diarylethene derivatives originating from photochromic conformation tuned by photo irradiation was investigated using UV-Vis absorption spectra, dynamic light scattering, scanning electron microscopy and atomic force microscopy techniques. For the diarylethene derivatives with histamine side chains it is surprising to find that the morphology of super molecular architectures was tuned from nanofibers into spherical nanoparticles by photo irradiation. It was also revealed that the corresponding architectures are closely dependant on pH values of the aqueous solution, which indicate there is a great possibility that the increasing pH values are favourable for rigid aggregates. The theoretic calculations and models of the self-assembled nanostructure were presented to illuminate the possible self-assemble mechanism. Electrochemical Impedance Spectroscopy in the micro-electrode was done to illustrate the feasibility of building ion channels by diarylethene derivatives.