Photochromic switching behaviour of donor-acceptor Stenhouse adducts in organic solventsElectronic supplementary information (ESI) available: Synthesis and characterisation, in situ irradiation experiments by UV-vis and NMR, X-ray crystallography. CCDC 1500303-1500307. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c6cc08079k

We report photochromic donor-acceptor Stenhouse adducts (DASAs) capable of fully reversible photoisomerization with visible light in organic solvents including chloroform, acetonitrile and benzene. The rates of photoisomerization and thermal reversion can be tuned by altering the electronics of the donor adduct. X-Ray crystallography and photo-NMR experiments unambiguously establish molecular structures. We report photochromic donor-acceptor Stenhouse adducts (DASAs) capable of fully reversible photoisomerization with visible light in organic solvents including chloroform, acetonitrile and benzene.