Article Dans Une Revue Chemistry - A European Journal Année : 2015

Diarylethene Self-Assembled Monolayers: Cocrystallization and Mixing-Induced Cooperativity Highlighted by Scanning Tunneling Microscopy at the Liquid/Solid Interface

Résumé

Stimulus control over 2-D multicomponent molecular ordering on surfaces is a key technology to realize advanced materials with stimuli-responsive surface properties. The 2-D molecular ordering formation along with photoisomerization was monitored by STM at octanoic acid/HOPG interface for the synthesized amide-containing diarylethene, which underwent photoisomerization between open-and closed-ring isomers and also side reaction to give annulated isomer. By the analysis of concentration dependence of surface coverage, the nucleation equilibrium constant (Kn) and the elongation equilibrium constant (Ke) were determined using cooperative model at the liquid/solid interface. It was found that the annulated isomer has very large equilibrium constant which explains the predominantly observed ordering of the annulated isomer. It was also found that the presence of the closed-ring isomer induces cooperativity in the formation of the molecular ordering of the open-ring isomer. The quantitative analysis of the ordering formation using cooperative model provided a new viewpoint toward 2-D multicomponent molecular ordering formation.

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hal-01916046 , version 1 (16-11-2018)

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Denis Frath, Takeshi Sakano, Yohei Imaizumi, Soichi Yokoyama, Takashi Hirose, et al.. Diarylethene Self-Assembled Monolayers: Cocrystallization and Mixing-Induced Cooperativity Highlighted by Scanning Tunneling Microscopy at the Liquid/Solid Interface. Chemistry - A European Journal, 2015, 21 (32), pp.11350-11358. ⟨10.1002/chem.201500804⟩. ⟨hal-01916046⟩
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