Dendritic cylindrical spherical shape

SHAPE CONTROL WITH QUASI-EQUIVALENT DENDRITIC SURFACES - DENDRITIC CYLINDRICAL AND SPHERICAL SHAPES... 

Apropos tree trunks and cylindrical surface This may also be a starting point to think about dendritic rods as supports with defined curvatures to which cat-alytically active components could be attached (Fig. 3b). In a way, cylinders of the size discussed here bridge the gap between homogeneous and heterogeneous catalysis. They may combine the respective advantages of both. Attachment of cat-alytically active groups to the surface at more or less constant distances may well provide candidates, eg, for applications in flow reactors. Spherically shaped den-drimers equipped with transition-metal complexes have already been successfully employed for such purposes (47-50). 

The supramolecular transformation from sphere to cylinder is supported by X-ray data indicating that the spherical polymers adopt a cubic phase, whereas the cylindrical polymers adopt a hexagonal phase [23b]. Further studies involving a library of dendritic macromonomers led to the conclusion that the effect of DP on polymer shape is a general phenomenon [24], More recently, scanning... 

The self-assembly mechanism proposed for these spherical and cylindrical polymer backbones surrounded with quasi-equivalent dendritic coats is outlined in Figure 12.9. This knowledge allows the rational design of polymers with well defined spherical and cylindrical shapes. Quasi-equivalent character of these... 

Self-organization of tapered and dendritic, i.e., fan- and cone-shaped dendron molecules in the solid was reported by Percec et al. in a series of papers [15J. Detailed diffraction experiments evidenced that spherical or cylindrical, (i.e. co-... 

Figure 4 DNA-synthetic polymer conjugates, (a) Incorporating extended aromatic molecules into DNA creates folded stmctures through jT-stacking. (b) Block copolymers consisting of DNA and synthetic polymers can be assembled into micelles via microphase separation of incompatible blocks, (c) A PEG-DNA-brush block copolymer can shape shift between spherical and cylindrical micelles depending on the specific DNA input, (d) Dendritic DNA, created by covalently modifying short DNA strands with dendritic oligoethylene moieties, self-assembles into long-range fibers without the need for sticky-end cohesion.

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