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Download filePhotoswitching of Conductance of Diarylethene–Gold Nanoparticle Network Based on the Alteration of π‑Conjugation
journal contribution
posted on 2016-05-18, 00:00 authored by Taichi Toyama, Kenji Higashiguchi, Tsukuru Nakamura, Hidehiro Yamaguchi, Eriko Kusaka, Kenji MatsudaDiarylethenes, which have same core
structures but have different
positions of thiol groups that are bound to gold nanoparticles, were
prepared. In one diarylethene, which has two thiol groups at the positions
equivalent to 5,5′-positions of di(3-thienyl)ethene, the π-connectivity
between two thiol groups increases upon photocyclization, but in the
other diarylethene, which has two thiol groups at 2- and 5-positions
of one of the 3-thenyl group, the π-connectivity decreases upon
photocyclization. The gold nanoparticle networks of these diarylethenes
were prepared and the change in conductance was measured upon alternate
irradiation with UV and visible light. For two diarylethenes, the
direction of the photoswitching was opposite, reflecting the difference
in the π-connectivity. The result suggests that the topology
of π-conjugation between electrodes is the decisive factor in
the conductance of gold nanoparticle network.