Cyclohexane, supramolecular assembly

A SEM image of the 13b organogel in cyclohexane showed formation of multilamellar assemblies. SAXS measurements confirmed the presence of repeat periods of 4.6 0.2 nm, which was consistent with the lamellar structure found in the aqueous system. The IR spectrum of the organogel indicated formation of the U-U hydrogen bonding in the 13a supramolecular assembly. 

Figure 11 outlines the structure of the homochiral enantiomers of the dendritic dipeptide, the CD and UV spectra as a function of temperature recorded in cyclohexane (a solvent that mimics the hydrophobic wall of the biological membrane and mediates self-assembly), and the structures of the supramolecular assemblies... 

Fig. 11 Structures of the homochiral dendritic dipeptides (a), their CD blue) and UV red) spectra recorded during self-assembly in cyclohexane (b, c), the nucleation and growth mechanism of cooperative supramolecular helical polymerization and the structures of the supramolecular assemblies (d). Modified with permission from [114]. Cop3right 2011 American Chemical Society...

Fig. 33 Examples of supramolecular rod4ike mesogens formed by self assembly of fluorinated benzoic acid and a /ra s-4-RF-cyclohexane carboxylic acid ( / / C) [120, 122]...

A complete study concerning a new class of supramolecular structures (supraminols) has been recently published. These supramolecular structures are formed by an enantiodifferentiating self-assembly between (If , 2f )-diaminocyclohexane and various trans-1,2-cyclohexane diols. An example is shown in eq 27. When racemic diols were used, a homochiral cristalline adduct is formed with an efficient kinetic resolution. 

Ringsdorf showed a nice example of confinement of supramolecular polymers.192 In cyclohexane, hexa-cinnamoyl azacrown 37 self-assembles to form supramolecular columnar polymers. The periphery of photopolymerizable groups forms cross-links via photocycloaddition and allows the pre-assembled supramolecular polymer to be transferred into a rodlike covalent polymer (Figure 21). Performing the reaction on molecularly dissolved molecules gives rise to a randomly cross-linked polymer with a lower DP. 

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