Organogel self-assembled

Kim and coworkers reported the application of breath figure method to a small photo-responsive molecule, i.e., a organogelator self-assembled into supramolecu-lar fibrillar networks and further ordered in a hierarchically honeycomb structure [194]. Recently, a new organogelator was synthesized and large-scale ordered honeycomb patterns were also observed [195]. Moreover, Babu et al. also reported the formation of hierarchical macroporous structures from an amino acid linked p-conjugated organogelator [196]. 

Keywords Cholesterol Steroids Organogels Self-assembly Supramolecular chemistry... 

Ishi-i T, Shinkai S (2005) Dye-Based Organogels Stimuli-Responsive Soft Materials Based on One-Dimensional Self-Assembling Aromatic Dyes. 258 119-160... 

Ajayagosh, A. and Praveen, V.K. (2007) rt-Organogels of self-assembled p-phenylenevinylenes soft materials with distinct size, shape, and functions. Accounts of Chemical Research, 2007,40 (8), 644-656. 

Das AK, Bose PP, Drew MGB, Baneijee A. The role of protecting groups in the formation of organogels through a nano-fibrillar network formed by self-assembling terminally protected tripeptides. Tetrahedron 2007 63 7432-7442. 

Simmons B, Li CS, John VT, McPherson GL, Taylor C, Schwartz DK, Maskos K (2002) Spatial compartmentalization of nanoparticles into strands of a self-assembled organogel. Nano Lett 2 1037-1042... 

For the large-scale production of new bio-surfactants [45] and, more recently, of sugar-containing self-assembled organogels with nanostructured morphologies [46]. 

In this chapter we introduced molecular self-assembly, which is becoming growing research area in the chemistry of ionic liquids. Our own earlier reports [6, 35] had touched off a burst of research on molecular assembly in ionic liquids and ionogel formation. A cholesterol-based organogelator. Scheme 11.9, was shown to induce... 

Figure 37 Electron micrographs of self-assembled fibres, (c) Electron micrograph showing the dense network of long helical fibres in a steroid/cyclohexane organogel, (d) Preparation of single fibres, demonstrating their helical superstructure [425]. (e) Cyclic oligopeptides, selfassembling into nanofibres [435,436], Reproduced with permission of The Royal Society of Chemistry and The American Chemical Society. Parts (c) and (d) 1986 American Chemical Society...

Fig. 2 Different paths to obtain hybrid materials from molecular sources. Path A Sol-gel routes (Al conventional route for hybrid nanocomposites, A2 molecularly homogenous hybrids). Path B Assembly of nanobuilding blocks (ANBB), of prefunctionalized or postfunctionalized clusters or nanoparticles. Route C or D involve the use of templates capable of self-assembly, giving rise to organized phases. Path E involves integrative synthesis combining precedent paths from A to D and other processes, such as the use of lithography, casting, organogels or latex beads as templates, controlled phase separations, or external fields. (From Ref. l) (View this art in color at www.dekker.com.)...

Ajayaghosh, A., Praveen, V.K., tt Organogels of Self assembled p Phenylenevinylenes Soft Materials with Distinct Size, Shape, and Functions, Acc. Chem. Res. 2007, 40, 644 656. 

Many of the hydrogen-bonding motifs that have been used in the field of self-assembly have been employed to design new organogelators. The interactions that in earlier studies were directed towards the formation of small, well-defined aggregates can by careful design be diverted for the formation of extensive networks within a gel matrix. In some cases interesting function-... 

Hydrogen Bonding for the Self-assembly of Organogels and Hydrogels... 

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