Arrangement, supramolecular

Fig. 4 Representation of the supramolecular arrangement of electroactive paramagnetic complexes emphasizing the n—d interactions through a chemical bridge between electronic spins of TTFs (or BEDT-TTFs) and d spins of transition metal ions and the polarization effects on the magnetic moment alignments of each complex...

Inoue et al. (2003) found that silk proteins will form rodlike structures and that those structure will assemble into comblike or fabric-like superstructure. The scale differences between the rods (nanometers) and the superstructure (micrometers) would suggest that the rod formation is governed by amyloid fibril formation and that the supramolecular arrangement is governed by the properties of the rod (Oroudjev et al., 2002 Putthanarat et al., 2000), namely surface interaction and hydration. Three levels of association could be considered (i) within the proteins internal /1-strands will organize to form intra /1-sheet structures, (ii) /1-sheets from neighboring molecules will associate to form fibril subunits, and (iii) the fibril subunits will further associate to form larger fibrils or rods. 

The various supramolecular arrangements are related to the geometry of the molecules through the packing criterion [12] ... 

Figure 3. A supramolecular arrangement of a helices of voltage-gated Na" channel proposed by Numa [Noda et al. (1984)). Four helix bundles of segment 2 from each repeat unit constitute the wall of hydrophilic pore through which ions pass. All the other helices 1, 3-6, cover the pore and stabilize it in bilayer membranes. The ion pair 1 is a mimic from oligoether carboxylate and dioctadecyidimethylammonium representing hydrophilic helix 2 and all the other hydrophobic helices 1 and 3-6, respectively.

Giraud-Guille, M.-M. (1996). Twisted liquid crystalline supramolecular arrangements in morphogenesis. Int. Rev. Cytol. 166, 59-101. 

Sdf-assembly Two oligonucleotides spontaneously organize themselves in duplex structures as encoded by the DNA base sequence. Even complex supramolecular arrangements can be realized, e.g. polyhedra or four-way junctions [2],... 

Fig. 4. Supramolecular arrangements of organometallic (65) and organic poly(aryleneethynylene)s (12) in the solid state.

Different dendritic side groups were linked to 7-oxanorbornene via an ester group (XXXII-XXXVI) (Fig. 20) [84-86]. The monomers by themselves also assembled into a supramolecular arrangement of spherical or columnar shapes. 

Tsuda et al. found the same fluorescence at = 600 nm in a giant vesicle in a card-packed azobenzene arrangement. The noisy appearance of their fluorescence trace (if not due to the technique of confocal laser miGroscopy), however, suggests a very low emission intensity. Both Shinomura and Kunitake and Tsuda et al. report time-dependent orientation phenomena on Z-E isomerization in the supramolecular arrangement, which is reflected in the fluorescence intensity. So the former general statement that azobenzene-type azo molecules do not emit needs to be modified. 

Figure 2.11.9 The simplified structure (left) and the supramolecular arrangement (middle) of compound 108 and (right) the molecular structure of 111...

---