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Molecular caroviologens

Slama-Schwok A, Blanchard-Desce M, and Lehn JM. 1992. Caroviologen molecular wires—Pulse-radiolysis of bis(pyridinium) polyenes. Journal of Physical Chemistry 96 10559-10565. [Pg.58]

Thus, the caroviologen approach does produce functional molecular wires that effect electron conduction in a supramolecular-scale system. Incorporation into black lipid bilayer membranes (BLM) should allow further investigations of the electron-transfer properties of these caroviologens and positive preliminary results have been obtained [8.145a]. A theoretical investigation of electron conduction in molecular wires has been made [8.145b]. [Pg.108]

Since caroviologens are rather fragile compounds, they can be protected from the environment by inclusion into polyanionic derivatives of (J-cyclodextrin in a rotaxane fashion 102 [8.156]. Also, in the design of molecular devices, it may be desirable to introduce some extent of redundancy in order to reduce the risk of device failure. This is the case in the tris-carotenoid macrobicycle 103 that represents a sort of triple-threated molecular cable whose crystal structure 104 has been determined. It forms a dinuclear Cu(i) complex 105 in which the bound ions introduce a positive charge at each of the species, a feature of potential interest for transmembrane inclusion [8.157]. [Pg.109]

Modification and functionalisation of natural polyenes, the carotenoids, is an efficient way for the molecular engineering of polyenic chains. Terminal bis-pyridinium carotenoids, termed caroviologens, represent an approach to electron conducting molecular wires (5). Fitting polyconjugated chains with an electron donor group on one end and an electron acceptor on the other end yields push-pull systems of type 1 that may be considered as polarized, unidirectional (oriented) molecular wires and also possess marked NLO properties. [Pg.437]

Figure 11.31 Molecular conductivity through a phospholipid vesicle by caroviologen 11.45.44... Figure 11.31 Molecular conductivity through a phospholipid vesicle by caroviologen 11.45.44...
Arrhenius, T. S., Blancharddesce, M., Dvolaitzky, M., Lehn, J. M., Malthete, J., Molecular devices - caroviologens as an approach to molecular wires synthesis and incorporation into vesicle membranes. Proc. Natl. Acad Sci. U. S. A. 1986, 83, 5355-5359. [Pg.807]

The pH-selective transport of K" " and Ca2+ ions across a liquid membrane was achieved using bis-tartaro-18-crown-6 derivatives. The incorporation of caroviologens (3) into vesicle bilayer membranes promises to be a viable entry into molecular wires. [Pg.7]

Kugimiya, S., Lazrak, T., Blanchard-Desce, M., and Lehn, J.-M. (1991) Electron conduction across vesicular bilayer membranes induced by a caroviologen molecular curve, J. Chem. Soc., Chem. Commun. 1179. [Pg.310]


See other pages where Molecular caroviologens is mentioned: [Pg.107]    [Pg.128]    [Pg.780]    [Pg.747]    [Pg.50]   
See also in sourсe #XX -- [ Pg.107 ]




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Caroviologens

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