The Missing Piece: Concentration Dependence of Donor‐Acceptor Stenhouse Adduct (DASA) Reactivity
نویسندگان
چکیده
Donor-Acceptor Stenhouse Adducts (DASAs) are molecular photoswitches that reversibly isomerize from a linear to cyclized form upon visible light irradiation. In the form, these molecules selectively react with thiol in thiol-Michael addition. Driven by complexity of switching mechanism and chemical properties DASAs, effect concentration (ranging 1 5 mM DASA) on addition was investigated. We find rate limiting step reaction is photochemically induced DASA isomerization, as higher concentrations do not alter at which adduct (TMA) formed. Moreover, kinetics product formation were found be more significantly affected irradiation concentrations. two distinct scenarios, where either or molar equivalence partner kept constant, TMA efficiently formed under These findings indicate reactivity towards reactions appear equilibrium-driven lower light-driven
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ژورنال
عنوان ژورنال: ChemPhotoChem
سال: 2021
ISSN: ['2367-0932']
DOI: https://doi.org/10.1002/cptc.202100056