Photoswitchable Association of an Azobenzne–Bipyridinium Diad to Eosin: Photostimulated “On‐Off” Guest Binding | Zendy

Willner Itamar | Zendy; Marx Sharon | Zendy; Eichen Yoav | Zendy

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Photoswitchable Association of an Azobenzne–Bipyridinium Diad to Eosin: Photostimulated “On‐Off” Guest Binding

Author(s) -

Willner Itamar,

Marx Sharon,

Eichen Yoav

Publication year - 1992

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.199212431

Subject(s) - azobenzene , isomerization , diad , dissociation (chemistry) , chemistry , eosin , molecular switch , photochemistry , molecule , organic chemistry , polymer , medicine , staining , pathology , copolymer , catalysis

The reversible photoinduced cis–trans isomerization of the azobenzene unit in 1 , together with the distinctly different association constants of the cis and trans isomers for the binding of 1 to eosin Y ( 2 , K = 38 000 and 3000 M −1 1, respectively) can be utilized to construct a molecular switch for the formation and dissociation of the complex between 1 and 2 that is light‐controlled. Such photo‐switchable units are important in information storage systems and signal processing on the molecular level.

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