Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Uwe-Martin Wiesler"'
Autor:
Károly Süvegh, Uwe-Martin Wiesler, Klaus Müllen, T. Marek, Attila Vértes, Andrzej Ernst, Roland E. Bauer, Markus Klapper, Tanja Weil
Publikováno v:
Handbook of Porous Solids
The free volume of a series of rigid polyphenylene dendrimers was studied by positron lifetime spectroscopy and the experimental data were compared with results from molecular dynamics calculations. Contrary to dendrimers containing flexible repeat u
Publikováno v:
Journal of Materials Chemistry. 13:1090-1093
Gold nanoparticles have been precipitated in the presence of a stiff polyphenylene dendrimer template with 16 thiomethyl groups on the outside. Powder X-ray diffraction analysis shows an average particle size of ∼3.7 nm; surprisingly, transmission
Publikováno v:
Macromolecules. 35:10071-10086
We present solid-state NMR investigations of a series of shape-persistent polyphenylene dendrimers of generation 1−4 with different surface functionalization. Using a combination of traditional static and more advanced magic-angle spinning (MAS) ex
Autor:
F. C. De Schryver, A. J. Berresheim, Tom Vosch, Klaus Müllen, Dörthe Grebel-Koehler, S. De Feyter, P. C. M. Grim, Daojun Liu, Uwe-Martin Wiesler
Publikováno v:
Langmuir. 18:8223-8230
Self-assembled nanostructures of various polyphenylene dendrimers, prepared by drop casting dendrimer solutions on the surface of highly oriented pyrolytic graphite (HOPG), have been investigated by noncontact atomic force microscopy (NCAFM). Besides
Autor:
Simona Loi, Hans-Jürgen Butt, Roland E. Bauer, Christina Hampel, Klaus Müllen, Uwe-Martin Wiesler
Publikováno v:
Langmuir. 18:2398-2405
Three types of polyphenylene dendrimers were demonstrated to spontaneously form stable, pinhole-free monolayers on graphite with a complex two-dimensional structure (Loi et al. Macromolecules 2001, 34, 3661). For this paper, we extended our study usi
Autor:
P. C. M. Grim, N. Vandamme, Klaus Müllen, Tom Vosch, Uwe-Martin Wiesler, F. C. De Schryver, S. De Feyter, A. J. Berresheim, D. J. Tiu, Hua Zhang, C. Van Haesendonck
Publikováno v:
Langmuir. 18:1801-1810
Polyphenylene dendrimer molecules, G2Td(COOH)16, were ionized (G2 ions) and then adsorbed on a carboxylic acid (COOH) group terminated self-assembled monolayer (SAM) on a Au substrate through the linkage with Cu2+ ions. The individual G2 ions were ob
Autor:
Marc van der Auweraer, Johan Hofkens, Uwe-Martin Wiesler, Frans C. De Schryver, Mircea Cotlet, Fabian Köhn, Klaus Müllen
Publikováno v:
Scopus-Elsevier
We report on a single-molecule study of a host-guest system that consists of a second-generation polyphenylene dendrimer and the cyanine dye Pinacyanol. The use of single-molecule spectroscopy enables us to obtain more detailed information on the pro
Publikováno v:
Advanced Materials. 13:752-756
Publikováno v:
Macromolecules. 34:3661-3671
The lateral organization of alkyl-substituted polyphenylene dendrimers on the basal plane of graphite has been investigated using atomic force microscopy. The dendrimers consist of a core of twisted, interlocked benzene rings and an external shell of
Publikováno v:
Macromolecules. 34:187-199
Monodisperse polyphenylene dendrimers up to the fourth generation were synthesized using a divergent growth protocol. By varying the core, dendrimers with dumbbell-, tetrahedral- and propeller-like structures were synthesized. Because of the high-den