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  • 1995-1999  (2)
  • host–guest  (1)
  • self-assembled monolayer  (1)
Datenquelle
Materialart
Erscheinungszeitraum
  • 1995-1999  (2)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Convenient Preparation of Self-Assembled Monolayers Derived from Calix[4]resorcinarene Derivatives Exhibiting Resistance to Desorption (1999)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 35 (1999), S. 173-183 
    Details
    ISSN: 1573-1111
    Schlagwort(e): calix[4]resorcinarene ; self-assembled monolayer ; photoisomerization ; aminosilanization ; chemisorption
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Crown conformers of O-carboxymethylated calix[4]resorcinarenes (CRA-CMs) bearing four perfluorooctyl- and octylazobenzene residues at the lower rim of the cyclic skeleton were synthesized to investigate the resistance to desorption of CRA-CMs forming self-assembled monolayers on aminosilylated silica substrates and the surface energy photocontrol based on E- to-Z photoisomerization of the azobenzene moiety. In comparison with CRA-CM monolayers on silica substrates, the desorption of CRA-CMs on the aminated substrate was remarkably suppressed even when CRA-CM monolayers were sonicated in polar solvents and even in water. The high desorption-resistance was attributable to multi-point adsorption of CRA-CMs through COOH/NH2 interactions. UV-Vis spectral studies revealed that CRA-CM substituted with p-octylazobenzene exhibited high E- to-Z photoisomerizability up to 92% in self-assembled monolayers, while less photoisomerizability was observed for CRA-CM bearing p-perfluorooctylazobenzenes due to the steric hindrance of the larger perfluoroalkyl chains. Photoinduced changes of contact angles for water up to 8.3° were observed for a CRA-CM monolayer.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1008126427392
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Molecular Orientation of a Nematic Liquid Crystal Induced by Mixing with Tetraalkylcalix[4]resorcinarenes at the Air–Water Interface (1999)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 35 (1999), S. 199-210 
    Details
    ISSN: 1573-1111
    Schlagwort(e): tetraalkylcalix[4]resorcinarene ; nematic liquid crystal ; host–guest ; bilayered structure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract O-Octacarboxymethoxylated tetraalkylcalix[4]resorcinareanes (CRA-CMs) formed stable monolayers on a water surface, whereas their π-A isotherms were affected by the length of the alkyl residues. A double-layered structuring was observed for CRA-CM having four undecyl substituents (11CRA-CM) by compression, though CRA-CM with four eicosyl residues formed a stable monomolecular film. 11CRA-CM possessed the ability to form a host–guest monolayer film with liquid crystalline 4,4'-dihexylazobenzene at the air/water interface, leading to perpendicular orientation of C6Azo. The host–guest mixed monolayers displayed a double-layered structuring by compression.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1008134629209
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
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