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Azacrown ethers, conformers

Macrocyclic 25 has been constructed with pseudocryptand 26 which can be discerned within Tsien s ratiometric fluorescent sensors as the Na receptor unit. Conformational changes by 26 upon ion binding allows strong off-on PET sensing action due to the ion-induced increase of its oxidation potential. X-ray structural evidence for the Na -induced conformational changes in 26 shows decreased conjugation with a 40° twist about the C-N bond of the 2-anisidine unit. X-ray evidence is also available for similar conformational changes in the non-macro-cyclic Ca " receptor 23. A related analysis has been made for a Ag" -phenyl-azacrown ether interaction which involves a soft-soft component. ... [Pg.11]

See other pages where Azacrown ethers, conformers is mentioned: [Pg.59]    [Pg.357]    [Pg.11]    [Pg.264]    [Pg.248]    [Pg.323]    [Pg.59]    [Pg.789]    [Pg.573]    [Pg.44]   
See also in sourсe #XX -- [ Pg.60 ]

See also in sourсe #XX -- [ Pg.60 ]



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Azacrown ether

Azacrowns

Ethers conformation

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