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  Photochromism of Amphiphilic Dithienylethenes as Langmuir–Schaefer Films

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.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0002-45A6-5 Version Permalink: https://hdl.handle.net/21.11116/0000-0006-D57F-C
Genre: Journal Article

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Supporting information. - Instrumentation; materials; synthetic procedures for 3, including NMR and high-resolution mass spectra; procedures for quantum yield, photoconversion and photostability studies; compression–decompression cycles of Langmuir films of 1–3; and AFM images and analysis of LS films of 1–3
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https://dx.doi.org/10.1021/acs.langmuir.8b02484 (Publisher version)
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 Creators:
Rossos, A.1, Author           
Katsiaflaka, Maria2, 3, Author           
Cai, J.4, Author
Myers, S. M.4, Author
König, E.5, Author           
Bücker, R.1, Author           
Keskin, S.1, Author           
Kassier, G.1, Author           
Gengler, Régis Y. N.1, Author           
Miller, R. J. D.1, 3, 6, Author           
Murphy, R. S.4, Author
Affiliations:
1Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938288              
2Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938286              
3The Hamburg Center for Ultrafast Imaging, University of Hamburg, ou_persistent22              
4Department of Chemistry and Biochemistry, University of Regina, ou_persistent22              
5Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074323              
6Departments of Chemistry and Physics, University of Toronto, ou_persistent22              

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 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.

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Language(s): eng - English
 Dates: 2018-08-162018-07-232018-09-052018-08-18
 Publication Status: Issued
 Pages: 8
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.langmuir.8b02484
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Title: Langmuir
Source Genre: Journal
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Publ. Info: Columbus, OH : American Chemical Society
Pages: 8 Volume / Issue: 34 (37) Sequence Number: - Start / End Page: 10905 - 10912 Identifier: ISSN: 0743-7463
CoNE: https://pure.mpg.de/cone/journals/resource/954925541194