Structure-function relationships of donor-acceptor Stenhouse adduct photochromic switches.

ABSTRACT: The first in-depth, systematic study of the photoswitching properties of Donor-Acceptor Stenhouse Adducts (DASAs) is reported. Barbituric acid derived DASAs functionalised with 14 different amines ranging from dimethylamine to 4-methoxy-N-methylaniline were structurally characterised in solution using ¹H and ¹³C NMR spectroscopy and, in eight cases, in the solid state by single crystal X-ray diffraction. The distribution of coloured and colourless isomers in the dark, their photostationary states under irradiation, apparent thermal half-lives, and fatigue resistance are systematically compared. A simple kinetic model is used to characterise photoswitching behaviour and reveals that minor structural modifications can significantly improve the photoswitching prop

SUBMITTER: Mallo N 

PROVIDER: S-EPMC6240811 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature