title: Molecular photoswitches based on spiro-acridans.
abstract: Thermally reversible photochromic spiro-acridans have been synthesized for the first time. They exhibit high ring opening efficiencies. As the formed zwitterions do not possess a merocyanine structure their lifetime is in the range of milliseconds to seconds. An observed side reaction can be avoided by suitable substitution of hydrogen atoms.
authors.affiliation: Humboldt-Universität zu Berlin, Institute for Chemistry, Brook-Taylor-Str. 2, D-12489 Berlin, Germany.
authors.forename: Alina
authors.initials: A
authors.lastname: Raskosova
authors.forename: Reinhard
authors.initials: R
authors.lastname: Stösser
authors.forename: Werner
authors.initials: W
authors.lastname: Abraham