Dendrimers schematic representation

Figure 8.9 Schematic representation of a conical monodendron self-assembled into a supramolecular spherical micellar dendrimer, and then into an fm3m cubic mesophase.

Fig. 2. Schematic representation of the supramolecular cylinders of the dendrimer derived from macromonomer 9 (R=OC12H25,n=3) in the Qh mesophase atop view of a cylinder containing six repeat units in a stratum with the alkyl tails melted to match the average column radius determined by X-ray scattering experiments b side view of a cylinder containing 30 repeat units of the polymer assembled with melted alkyl tails. Reproduced with permission from references 5 a...

Figure 12.20 Schematic representation of a core-shell tecto-(dendrimer) molecule in solution...

Figure 16.3 Schematic representation of the compression of alkyl modified dendrimers at the air-water interface, the dendrimers assume a flattened, disklike conformation...

Figure 16.6 Schematic representation of the energy transfer process between OPV-poly(propylene imine) dendrimer and a dye guest molecule [84]...

Figure 16.7 TEM picture (uranyl acetate staining) of vesicles reported by Schenning etal. [44] (A) schematic representation of the bilayer, (B) palmitoyl-and (C) azobenzene-modified poly(propylene imine) dendrimers used in the construction of the aggregates...

Scheme 3 Schematic representations of electrostatic assemblies of dendrimer porphyrins 6a, 7a with MV2+...

Fig. 5 Schematic representation of the [Zn(2)2]2+ species in which the dendrimer branches are extending outward...

Figure 28 A schematic representation of the possible composition of ferrocene-based dendrimers. (a) Dendrimers containing a single ferrocene unit (b) dendrimers containing multiple ferrocene units...

Fig. 7.1 Schematic representation of linear versus dendritic polymers linear (left) and hyperbranched (middle) polymers, perfect dendrimer (right). The amount of terminal groups is indicated below each structure. These architectures can also be attached to a cross-linked polymer bead to obtain a high-loading hybrid material.

Fig. 7. Schematic representation of the non-covalent immobilization of ligands to a dendrimer support and the actual supramolecular dendritic complex containing 32 phosphine ligands 21).

Fig. 13. Schematic representation of a scandium triflate cross-linked fourth generation poly(propyl-ene imine) dendrimer (DAB).

Fig. 14. Schematic representation of four types water-soluble PAMAM dendrimers containing phosphine ligands.

Fig. 15. Schematic representation of the formation of an inverse micelle from a PAMAM dendrimer-encapsulated palladium nanoparticle.

The divergent method is illustrated in Fig. 2-22 for the synthesis of polyamidoamine (PAMAM) dendrimers [Tomalia et al., 1990]. A repetitive sequence of two reactions are used—the Michael addition of an amine to an a,P-unsaturated ester followed by nucleophilic substitution of ester by amine. Ammonia is the starting core molecule. The first step involves reaction of ammonia with excess methyl acrylate (MA) to form LXIII followed by reaction with excess ethylenediamine (EDA) to yield LXIV. LXV is a schematic representation of the dendrimer formed after four more repetitive sequences of MA and EDA. 

Figure 11.9 (Top) A typical structure of Tha)oimanavan s amphiphilic dendrimers. (Bottom) Schematic representation of micelle-type and inverse miceUe-type structural organization.

Figure 11.11 Schematic representation of the stmctural impact of counterion screening on the size of the dendrimer.

Figure 11.13 Schematic representation of dynamic conformational change from diskhke to spherical morphologies in dendrimers.

Schematic representation of the monolayer organization of amphiphilic dendrimers on the water surface.

Figure 11.10 Schematic representations of the structural impact of charge repulsion on dendrimer size.

Schematic representations, like those shown in the Scheme 1, are very useful to indicate the chemical composition of the various species and to discuss the interaction between the various building blocks. Furthermore, as one can understand from the representations shown in Figures 9 and 10, the species with high nuclearity exhibit a ttu-ee-dimensional branching structure of the type of those shown by otherwise completely different dendrimers based on organic components. Therefore, endo- and exo-receptor properties can be expected, which are currently under investigation. Furthermore, aggregation of decanuclear complexes has also been demonstrated by dynamic light-scattering and conductivity experiments. Systematic studies on aggregation properties have, however, not been performed yet.

Figure 5.3 Schematic representation of the light-harvesting redox-active dendrimers and...

Scheme 1 Schematic representation of divergent and convergent approaches to dendrimer synthesis...

The design of metallodendrimers involves considering the position and repetition of the (catalytically active) metal site in the dendrimer framework, such as on the periphery (A) or at the core (B). Figure 2 shows schematic representations of different types of metallodendrimers. 

Fig. 2 Schematic representations of metallodendritic architectures according to the metal (catalyst) location A at the periphery of a dendrimer or of a dendron B at the core of a dendrimer or at the focal point of a dendron C at branching points of a dendrimer or of a dendron D dendrimer-encapsulated metal nanoparticles (DEMNs)...

Scheme 14 Schematic representation of the preparation of transition-metal complexes using ligands which are noncovalently anchored to the periphery of a dendrimer...

Fig. 4. Schematic representation of the aggregation of liposome bilayers induced by complementary dendrimers...

Fig. 15. Schematic representation of the model nanomolecular composite structure from SANS and SAXS measurements. Left, individual dendrimer molecule with CuS trapped at its periphery. Right, multimolecular cluster of individual dendrimer/CuS particles. Reprinted with permission from [49], Copyright 2002 Elsevier Science...

Fig. 1. Schematic representation of a dendrimer, evidencing three different regions core, branches, and surface.

Fig. 2. Schematic representation of the six cases of metal complexes with dendritic ligands dendrimers containing one (a) or more (b) metal complexes (hexagons) as branching centers dendrimers capable of coordinating one (c) or multiple (d) metal ions (circles) dendrimers assembled around metal ions without (e) or with (f) other ligands (L-L).

Fig. 10. Schematic representation of (a) a fluorescent sensor with signal amplification and (b) a conventional fluorescent sensor. In the case of a dendrimer, the absorbed photon excites a single fluorophore component, that is quenched by the metal ion, regardless of its position. For more details, see text.

Fig. 12. Schematic representation of a metal complex containing a Zn ion coordinated by two cyclam-cored dendrimer 5, and the corresponding scheme (Fig. 2e).

Fig. 14. Schematic representation of a metal complex constituted by dendrimer 5, a Zn + ion, and one molecular clip, and the corresponding...

Fig. 3 Schematic representation of the self-assembling of conical-like monodendrons into spherical supramolecular dendrimers and their self-organization into cubic phases (here Pm3n symmetry)...

Fig. 30 Schematic representation of the molecular model for dendrimers with one-terminal-chain mesogenic units. Model for the Smectic A supramolecular organization (here G3-Li dendrimer)...

Fig. 33 Schematic representation of the molecular model for the dendrimers bearing the L2 mesogenic unit. Model for the columnar supramolecular organization (D inter-columnar distance)...

Fig. 49 Schematic representation of homolithic (A) and heterolithic alternated (B), segmented (C) and alternated-segmented (D) octopus-like dendrimers...

Fig. 52 Schematic representation of the self-assembling and self-organization processes of octopus-like dendrimers into the Colh phase...

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