Reversible Photoisomerization in Thin Surface Films from Azo-Functionalized Guanosine Derivatives.

ABSTRACT: Two novel azo-functionalized guanosine derivatives were synthesized, and their photoisomerization process was investigated in molecular monolayers at the air-water interface and in the Langmuir-Blodgett (LB) films on solid substrates. Measurements of surface pressure vs area isotherms, surface potential measurements, UV-visible (vis) absorption spectroscopy, Brewster angle microscopy (BAM), and atomic force microscopy (AFM) were performed. Despite not having a typical amphiphilic molecular structure, the derivatives formed stable films on the water surface. They could also undergo repeated photoisomerization in all of the investigated thin-film configurations. The observations suggest that in the films at the air-water interface, the molecules first exhibit a conformational change, and the

SUBMITTER: Licen M 

PROVIDER: S-EPMC8210406 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature