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Journal Article

Photochromism of Amphiphilic Dithienylethenes as Langmuir–Schaefer Films

MPS-Authors
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Rossos,  A.
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Katsiaflaka,  Maria
Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Center for Ultrafast Imaging, University of Hamburg;

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König,  E.
Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Bücker,  R.
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Keskin,  S.
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Kassier,  G.
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Gengler,  Régis Y. N.
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Miller,  R. J. D.
Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Center for Ultrafast Imaging, University of Hamburg;
Departments of Chemistry and Physics, University of Toronto;

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Supplementary Material (public)

la8b02484_si_001.pdf
(Supplementary material), 13MB

Citation

Rossos, A., Katsiaflaka, M., Cai, J., Myers, S. M., König, E., Bücker, R., et al. (2018). Photochromism of Amphiphilic Dithienylethenes as Langmuir–Schaefer Films. Langmuir, 34(37), 10905-10912. doi:10.1021/acs.langmuir.8b02484.


Cite as: https://hdl.handle.net/21.11116/0000-0002-45A6-5
Abstract
Surface pressure–area isotherms were recorded under different irradiation conditions for single-component Langmuir films of three photochromic amphiphilic dithienylethenes. Nonirradiated films of these photochromic amphiphiles were mechanically stable. In addition, a shift of the isotherms to larger mean molecular areas was observed for films prepared from UV-light-irradiated dithienylethenes. Unexpectedly, a significant expansion was observed for a film prepared from visible-light-irradiated dithienylethene incorporating large branched alkyl chains. Upon further study, atomic force microscopy and transmission electron microscopy images of Langmuir–Schaefer films revealed that this pronged dialkyl derivative undergoes a photoinduced change in morphology, as circular aggregates coalesce into larger continuous aggregated structures. Nevertheless, its photoisomerization was completely reversible as single-component multilayer thin films upon direct UV or visible light irradiation.