A Dendritic Nanocylinder: Shape Control Through Implementation of Steric Strain

Abstract

indicated by the topography of the films shown in Figure 6 (1c and 2c). Studies by Raman spectroscopy and X-ray diffraction are in progress in our laboratory to investigate the effect of canalization and a possible one-pot intercalation on these systems. Work is in progress to assemble an electrochromic device using this material and to study its photoelectrochemical properties.

Dendronisierte Polymere: Synthese, Charakterisierung, Grenzflächenverhalten und Manipulation

“…Durch chemische Modifizierungen gelang es jedoch schlieûlich, einen durchschnittlichen Wert von P n 110 zu ermitteln. Dieser Wert für P n resultiert nach der Carothers-Gleichung [49] MD-Simulationen im Vakuum wurden mit den Polymeren P12(G3) [50] und P16/17(G3) [51] durchgeführt, die beide dieselben G3-Dendronen tragen, sich aber im mittleren Abstand der dendritischen Ankergruppen ebenso voneinander unterscheiden (P12 ( groûen Zahl von Atomen im Polymer konnten Lösungsmittelmoleküle nicht berücksichtigt werden. Die berechneten Minimumkonformationen sind in Abbildung 6 gezeigt.…”

“…SFM-Bilder von P12(G3) wurden für dünne (im Bereich von 20 ± 30 nm), durch langsame Filmbildung gewonnene Schichten auf hochorientiertem pyrolytischem Graphit (HOPG) gewonnen (Abbildung 10). [50] Sie weisen einen bemerkenswert hohen Ordnungsgrad auf: Man kann Domänen erkennen, die aus periodisch angeordneten Reihen mit einer Periodizität von D 5.0 AE 0.5 nm bestehen. MD-Simulationen (Abbildung 6, oben) und SANS-Messungen ergeben zum Vergleich Stäbchendurchmesser von D 4.4 AE 0.2 nm bzw.…”

The Effects of Crowding in Dendronized Polymers

“…5 Applications envisioned for these molecules include roles in nanoelectronics, 6,7 catalysis, 8 biotechnology, 2,9 and molecular device fabrication. 10 The large size and often-poor solubility of dendronized polymers make their characterization challenging, however, and many basic questions regarding their conformational statistics stand open. Though some single-chain studies 11 have been performed, our understanding of the effect that the topological parameters have on the physical properties of these materials remains incomplete.…”

The macromonomer route to dendronized polymers

“…2. Dendronized polymers, represented as white/grey (or blue/red) cylinders, put to work as (a) catalyst (M) supports in nanodimensions [9], (b) polyinitiator for the synthesis of 'hairy' functional derivatives, energy transfer, light harvesting, and/or electrically conducting materials [10][11][12][13][14][15], objects for covalent attachment by the move-connect-prove strategy between individualized molecules on solid surfaces [16], novel, ultra-highly charged polyelectrolytes for, e.g., wrapping with DNA and subsequent gene transfection studies [17], lengthwise segregated polar/non-polar constituents of novel 'supercylinders' [18,19], nanoobjects for surface patterning and to induce periodicity changes from the Angstrom to nanometre scale [20,21]. explain why a steadily increasing number of research groups worldwide are now entering this fascinating field of research.…”

“…explain why a steadily increasing number of research groups worldwide are now entering this fascinating field of research. For a more detailed discussion of their potential applications the reader is referred to the pertinent literature [3][4][5][6][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”