Supramolecular Structure and Function 7: Volume 3

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Recent studies have shown that supramol. Furthermore, the assembly pathway can influence the shape, internal structure, and dimension of nanostructures and thereby affect their bioactivity. The authors discuss methods to map the energy landscape of a PA structure as a function of thermal energy and ionic strength and vary these parameters to convert between kinetically trapped and thermodynamically favorable states.

The authors also demonstrate that the pathway-dependent morphol. The dynamics assocd. For example, by conjugating radical electron spin labels to PAs, ESR spectroscopy can be used to study the rotational diffusion rates within the fiber, showing a liq. PAs can also be labeled with fluorescent dyes, allowing the use of super-resoln. For a weak hydrogen-bonding PA, individual PA mols.

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The amt. In one case, weak hydrogen bonding within a PA resulted in cell death through disruption of lipid membranes, while in another example reduced hydrogen bonding enhanced growth factor signaling by increasing lipid raft mobility.

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PAs are a promising platform for designing advanced hybrid materials. The authors discuss a covalent polymer with a rigid arom. PA structure with identical chem. The covalent polymn. These novel hybrid structures have potential in self-repairing materials and as reusable scaffolds for delivery of drugs or other chems.

Finally, the authors highlight recent biomedical applications of PAs and related structures, ranging from bone regeneration to decreasing blood loss during internal bleeding. An alternative method to synthesize intermediate nanoscopic size steroid nanotubes is presented which used a simple aq.

Supramolecular Chemistry: From Molecules to Nanomaterials, 8 Volume Set

The steroid nanotubes were obtained in dil. The tubules were easily oriented, which is a promising property for the synthesis of bulk oriented materials. Colloid Interface Sci. Elsevier B.

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  7. Kinetic constraints on self-assembly into closed supramolecular structures.
  8. The salts of bile acids bile salts self-assemble in aq. The micellization is not only driven by the hydrophobic effect, but also hydrogen binding. Moreover, instead of a small, hydrophilic head and a flexible, hydrophobic tail, bile salts are rigid, almost flat mols. This results in a complex self-assembly behavior with very distinct aggregate properties. Some characteristics resemble the behavior of classical amphiphiles, while others are very different and reminiscent of other classes of mols.

    Reviewed are the peculiar properties of bile salt aggregates, concg. Angewandte Chemie International ed. Perylene bisimides are among the most valuable functional dyes and have numerous potential applications. As a result of their chemical robustness, photostability, and outstanding optical and electronic properties, these dyes have been applied as pigments, fluorescence sensors, and n-semiconductors in organic electronics and photovoltaics.

    However, the supramolecular approach to the formation of perylene bisimide aggregates has been restricted mostly to organic media. Pleasingly, considerable progress has been made in the last few years in developing water-soluble perylene bisimides and their application in aqueous media. One of the most fascinating subjects in areas such as nanoscience and biomimetic chem. The supramol. The rigid arom. The self-assembly of arom. Extended core discotic mols.

    Here, cellular uptake systems based on dynamic supramol. Discotics featuring peripheral amine functionalities that endow the supramol. This enabled the uptake of otherwise cell-impermeable discotics via cotransport as a function of supramol.

    Impact of the supramolecular structure of cellulose on the efficiency of enzymatic hydrolysis

    Dynamic multicomponent and multifunctional supramol. A review on semi-cryst. The prepn. A review with 65 refs. The use of mol.

    Templating techniques that transform biomol. By using a lipid-based microcylinder tubule as a paradigm, the path followed from research and development to emerging technol. This process includes modification of the lipid mol. Aggeli, A. National Academy of Sciences.

    Supramolecular Chemistry: Vol 18, No 3

    A generic statistical mech. The finite fibril width and helicity is shown to stem from a competition between the free energy gain from attraction between ribbons and the penalty because of elastic distortion of the intrinsically twisted ribbons on incorporation into a growing fibril. Fibers are stabilized similarly. The behavior of two rationally designed aa residue peptides, PI and PII, is illustrative of the proposed scheme.

    The energetic parameters governing self-assembly have been estd. The model also provides a prescription of routes to novel macromols. Capito, Ramille M. We report here the self-assembly of macroscopic sacs and membranes at the interface between two aq. The formation of a diffusion barrier upon contact between the two liqs. We hypothesize that growth of the membrane is then driven by a dynamic synergy between osmotic pressure of ions and static self-assembly.

    These robust, self-sealing macroscopic structures offer opportunities in many areas, including the formation of privileged environments for cells, immune barriers, new biol. We here present the principle of chiral self-assembly for the formation of lipid nanotube, its prepn.

    A modular approach towards tissue engineering. Chemical Society of Japan. Materials science based on supramol. The self-assembly of small synthetic mols. Much afford is put into the development of supramol. These supramol. The field of regenerative medicine in general and that of tissue engineering in particular is one of the most challenging areas in which supramol.

    In tissue engineering, the biol.

    Protein Structure

    Ideal biomaterials do not only have to fulfil the biomaterials trinity of tuneable mech. Therefore, a modular, self-assembly approach using several supramol. It is proposed that the artificial materials described in this account have the same type of dynamic ability to adapt its biofunctionality as is so well known for the living cells in the host tissue.

    This account will highlight two systems, i. Biomaterials , 30 , — , DOI: Jung, Jangwook P. Elsevier Ltd. Self-assembling peptides and peptide derivs. In order to systematically refine such scaffolds to elicit specific desired cell behaviors, ligand display should ideally be achieved without inadvertently altering other physicochem. Moreover, for in vivo applications, self-assembled biomaterials must exhibit low immunogenicity. In co-assemblies of the ligand-bearing peptides with Q11, ligand incorporation levels capable of influencing the attachment, spreading, morphol.

    Research in the areas of drug delivery and tissue engineering has witnessed tremendous progress in recent years due to their unlimited potential to improve human health. Meanwhile, the development of nanotechnol. Biomaterials with nano-scale organizations have been used as controlled release reservoirs for drug delivery and artificial matrixes for tissue engineering. Drug-delivery systems can be synthesized with controlled compn.