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Photoswitching, Umpolung and Reversible Self-Assembly of Gold Nanoparticles Covered With Thiolated Donor-Acceptor Stenhouse Adducts

preprint
submitted on 18.09.2020 and posted on 18.09.2020 by grzegorz sobczak, Iwona Misztalewska-Turkowicz, Volodymyr Sashuk
The possibility of incorporating functional groups into molecular photoswitches is a prerequisite for their versatility and broad-range applications. Herein we present the first successful synthesis of DASA chromophores featuring a thiol group. The latter provides a unique opportunity to investigate the photoswitching behavior of these visible-light operating chromophores on the surface of metallic nanoparticles. This behavior can be modulated by irradiation time, solvent composition, DASAs population, and the organic layer underneath the chromophores. Moreover, the changes in polarity induced by DASAs photoisomerization are translated onto the colloidal particles giving rise to unusual interfacial and bulk-phase phenomena, including nonlinear solubility effects and reversible agglomeration that takes place in a time-controllable fashion. These findings pave the way for the rational design of new photoresponsive and smart materials.

Funding

SONATA BIS 4 no. 2014/14/E/ST5/00778

POPW.01.03.00–20–034/09–00

History

Email Address of Submitting Author

vsashuk@ichf.edu.pl

Institution

Institute of Physical Chemistry, Polish Academy of Sciences

Country

Poland

ORCID For Submitting Author

0000-0002-5907-8596

Declaration of Conflict of Interest

there is no conflict of interest

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