Multiscale Approach of Photochromism: Synthesis and Photochromic Properties of a Diarylethene in Solution, in Nanoparticles, and in Bulk Crystals


  • We thank A. Brosseau, J.-J. Vachon, and S. Ngo for their experimental support. Octafluorocyclopentene was kindly provided by Nippon Zeon Corporation. The Ministry of Research (France) – ACI Physico-Chimie de la Matière Complexe – “PhotoStimMat”, Agence Nationale de la Recherche (France) – PNANO Program – “NanoPhotoSwitch”, and the Ministry of Education, Culture, Sports, Science and Technology (Japan) – Kakenhi, Grant-in-Aid for Scientific Research on Priority Area – “Strong Photon-Molecule Coupling Fields (Area No.470, No.19049011)” are acknowledged. Collaboration was supported by EGIDE-JSPS -Sakura-, JSPS – Summer Program – and CNRS – GDRI – “PHENICS”. Supporting Information is available online from Wiley InterScience or from the authors.


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A new photochromic diarylethene, 1,2-bis(5′-ethoxy-2′-(2″-pyridyl) thiazolyl) perfluorocyclopentene (1), is synthesized. Nanoparticles are obtained by laser ablation at both 355 and 532 nm, corresponding to the absorption wavelengths of the open and the closed forms. 1 can be reversibly photoswitched in various states: organic solution, bulk crystal, nanoparticle colloidal solution, and single nanoparticle, as demonstrated by dark-field scattering spectroscopy.