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DNA‐Assisted Long‐Lived Excimer Formation in a Cyclophane
Author(s) -
Neelakandan Prakash P.,
Ramaiah Danaboyina
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200803162
Subject(s) - cyclophane , excimer , anthracene , dna , chemistry , aqueous solution , photochemistry , fluorescence , crystallography , crystal structure , organic chemistry , optics , physics , biochemistry
A color‐changed sandwich : A novel water‐soluble cyclophane containing anthracene and imidazolium moieties (see structure) exhibits dual emission in aqueous medium and undergoes sequence‐selective interactions with DNA but not with proteins and micelles. In the presence of DNA, it forms a sandwich‐type excimer, which exhibits an unusually long lifetime ( τ ) and red‐shifted emission. This cyclophane can be used for DNA recognition through “turned on” excimer emission.