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Cover Picture Enzymatically Derived Sugar-Containing Self-Assembled Organogels with Nanostructured Morphologies (Angew. Chem. Int. Ed. 292006)

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Cover Picture
George John, Guangyu Zhu, Jun Li, and Jonathan S. Dordick*
Enzymatically synthesized symmetrical trehalose diesters self-assemble into fibrous
gel networks in a wide range of organic solvents and at very low gelator
concentrations. Gels containing acrylate functionalities can be further stabilized
through polymerization. In the presence of added water and the same enzyme, the
gels degrade into trehalose, as shown in the cover picture. In their Communication on
page 4772 ff., J. S. Dordick et al. describe how combining the principles of
supramolecular chemistry and the selectivity of biocatalysis represents a powerful
strategy to develop defined functional materials.
Concept of Selectivity
In his Essay on page 4724 ff., J. A. Berson describes the reception by the scientific
community in the first half of the 20th century of the principles of kinetic versus
thermodynamic control and explains the physical basis of selectivity.
Asymmetric Heterogeneous Catalysis
An overview of the concepts of asymmetric heterogeneous catalysis is given in the
Review by F. Glorius et al. on page 4732 ff. The central themes are metal–organic
catalysts, chiral modifiers, noncovalent immobilization, and the application of solid
supports.
Composite Materials
In their Communication on page 4764 ff., K. Sada, S. Shinkai, and co-workers
describe how the anisotropy of l-cystine single crystals leads to their face-selective
decoration by gold nanoparticles.
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self, sugar, nanostructured, assembler, int, cover, angel, containing, organogels, chem, 292006, morphologies, picture, derived, enzymatically
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