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Crown-ether, azobenzene amphiphilic

In addition to crown-ethers, calix[4]resorcinarenes 19 have also been used as head groups to obtain azobenzene amphiphiles with sufficient photo-isomerization in LBK films. For this purpose, azobenzene moieties have been tethered to the lower rim of the crown conformer of the calixarene. O-octacarboxymethoxylated calix[4]resorcinarenes 19 (X = CH2-COOH) display efficient trans to cis photoisomerizability in densely packed mono-layers on a water surface, in LBK films, and in surface-adsorbed monolayers, whereas the noncarboxymetylated 19 (X = H) derivative gives films that are too densely packed. However, the aggregation is already suppressed efficiently compared to the azobenzene derivative without calixaren. ... [Pg.191]

See other pages where Crown-ether, azobenzene amphiphilic is mentioned: [Pg.366]    [Pg.191]    [Pg.61]    [Pg.348]    [Pg.236]    [Pg.343]    [Pg.348]    [Pg.191]    [Pg.262]   
See also in sourсe #XX -- [ Pg.191 ]



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Crown-ether, azobenzene

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