Regular Arrays of Rod‐Shaped Molecular Photoswitches: Synthesis, Preparation, Characterization, and Selective Photoswitching within Mono‐ and Bilayer Systems

Author:

Severa Lukáš1,Santos Hurtado Carina1,Rončević Igor1,Mašát Milan1,Bastien Guillaume1,Štoček Jakub Radek1,Dračínský Martin1,Houska Václav1,Kaletová Eva1,Garza Danielle John2,Císařová Ivana3,Cimatu Katherine Leslee A.2,Bastl Zdeněk4,Kaleta Jiří1ORCID

Affiliation:

1. Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nám. 2 160 00 Prague Czech Republic

2. Department of Chemistry and Biochemistry Ohio University Athens OH 45701 USA

3. Department of Inorganic Chemistry Faculty of Science Charles University Prague Hlavova 2030 128 40 Prague 2 Czech Republic

4. J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences Dolejškova 2155/3 182 23 Prague 8 Czech Republic

Abstract

AbstractWe assembled photoresponsive mono‐ and bilayer systems with well‐defined properties from rod‐shaped molecules equipped with different photoswitches. Using properly chosen chromophores (diarylethene‐based switch and unidirectional light‐driven molecular motor), we then selectively targeted layers made of the same types of photoswitches using appropriate monochromatic light. UV‐vis analysis confirmed smooth and unrestricted photoisomerization. To achieve this, we synthesized a new class of triptycene‐based molecular pedestals adept at forming sturdy Langmuir‐Blodgett films on a water‐air interface. The films were smoothly transferred to gold and quartz surfaces. Repeated deposition afforded bilayer systems: one layer containing diarylethene‐based photoswitches and the other a unidirectional light‐driven molecular motor. Structural analysis of both mono‐ and bilayer systems revealed the molecules to be tilted with carboxylic functions pointing to the surface. At least two different polymorphs differing in monolayer thickness and tilt angle (~40° and ~60°) were identified on the gold surface.

Funder

Ústav organické chemie a biochemie Akademie věd České republiky

Grantová Agentura České Republiky

Ministerstvo Školství, Mládeže a Tělovýchovy

Publisher

Wiley

Subject

General Chemistry,Catalysis,Organic Chemistry

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