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- Title
Reversible Photoisomerization of Monolayers of π‐Expanded Oligothiophene Macrocycles at Solid–Liquid Interfaces.
- Authors
Cojal González, José D.; Iyoda, Masahiko; Rabe, Jürgen P.
- Abstract
Self‐assembled monolayers of a π‐expanded oligothiophene macrocycle undergo photoisomerization between their Z,Z and E,E diastereomers at the interface between octanoic acid solutions and highly oriented pyrolytic graphite (HOPG). The switching process proceeds in situ at the solid–liquid interface and was followed by scanning tunneling microscopy (STM). Upon illumination with light at 365 nm (546 nm), a monolayer of Z,Z‐8mer (E,E‐8mer) photoisomerizes to the E,E‐8mer (Z,Z‐8mer) form with changes in 2D hexagonal packing. These findings provide insight towards the design of photoresponsive surfaces with desirable optoelectronic and structural (host–guest) properties.
- Subjects
PHOTOISOMERIZATION; MONOMOLECULAR films; SOLID-liquid interfaces; OLIGOTHIOPHENES; MACROCYCLIC compounds
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 52, p17284
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201809514