143445-50-5Relevant academic research and scientific papers
Shining new light on the spiropyran photoswitch: A photocage decides between cis-trans or spiro-merocyanine isomerization
Fleming, Cassandra L.,Li, Shiming,Grotli, Morten,Andréasson, Joakim
, p. 14069 - 14072 (2018)
Photochromic molecules from the spiropyran family are known to undergo light-induced interconversion between the colorless spiro- and the colored merocyanine forms. Here, we show for the first time that small structural modifications open up for an additional photoisomerization mode: reversible cis-trans isomerization of the merocyanine. Moreover, the introduction of a photocage allows for light-activated switching between the two modes.
Alkali-Metal Cation Recognition Induced Isomerization of Spirobenzopyrans and Spironaphthoxazins Possessing a Crown Ring as a Recognition Site: Multifunctional Artificial Receptors
Inouye, Masahiko,Ueno, Masaru,Tsuchiya, Kikuo,Nakayama, Naomi,Konishi, Takashi,Kitao, Teijiro
, p. 5377 - 5383 (1992)
Spirobenzopyrans and spironaphthoxazins possessing a monoaza-crown ring were synthesized.Isomerization of these compounds to the open colored merocyanines was induced by recognition of alkali-metal cations and the selectivity of the coloration was found to be governed by several factors: (1) the size of the crown ring, (2) the position of recognition, (3) electric properties of both the complexed cations and the merocyanine dipoles, and (4) the length of the alkyl chains connecting the spirobenzopyran units and the crown units.The spirobenzopyrans represent rationally designed multifunctional receptors for alkali-metal cations.
