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Self-assembly with modification

In this case, the restriction of peptide self-assembly was both desired, and by design. More generally, when looking to modify peptides and retain their self-assembly, where modifications are incompatible with assembly, post-assembly strategies will be necessary. [Pg.66]

Self-assembly can be divided into a number of classes 1. strict self-assembly, 2. irreversible self-assembly, 3. precursor modification followed by self-assembly, 4. self-assembly with post-modification, 5. assisted self-assembly, 6. directed self-assembly, 7. self-assembly with intermittent processing. [Pg.733]

Gibb, B. C., Strict self-assembly and self-assembly with covalent modification , in Encyclopedia of Supramolecular Chemistry, Atwood, J. L.. Steed, J. W., eds. Marcel Dekker New York, 2004. Vol. 2, pp. 1372-1378. [Pg.735]

Several types of self-assembly have been identified from the biological literature 7 (i) thermodynamic self-assembly (ii) irreversible self-assembly (iii) assisted and directed self-assembly and (iv) self-assembly with pre-, post-, or intermittent modification. [Pg.748]

Self-assembly processes involving covalent modifications typically comprise one of the earlier classes of self-assembly followed by, preceded by, or intermixed with conventional covalent bond formation. In coordination chemistry, for example, self-assembly with precursor modification means synthesizing the component ligands and metal complexes before carrying out the reaction. Post-modification involves locking a self-assembled structure into a kinetically stable state. Self-assembly with intermittent processing involves combinations of both of these. [Pg.748]

Catenanes and Other Interlocked Molecules, p. 206 DNA Nanotechnology, p. 475 Nomenclature in Crystal Engineering, p. 967 Plutonic and Archimedean Solids, p. 1100 Self-Assembling Catenanes. p. 1240 Strict Self-Assembly and Self-Assembly with Covalent Modifications, p. 1372 Supramolecular Isomerism, p. 1420 The Template Effect, p. 1493... [Pg.234]

Strict Self-Assembly and Self-Assembly with Covalent Modification, p. 1372 Supramolecular Polymers, p. 1443... [Pg.473]

Hemoglobins O2 Uptake and Transport, p. 636 Molecular Logic Gates, p. 893 Molecular-Level Machines, p. 931 Phthalocyanines, p. 1069 71—71 Stacking Theory and Scope, p. 1076 Potphyrin-Based Clathrates, p. 1150 Self-Assembly Definition and Kinetic and Thermodynamic Considerations, p. 1248 Self-Assembly Terminology, p. 1263 Strict Self-Assembly and Self-Assembly with Covalent Modifications, p. 1372 Supramolecular Photochemistry, p. 1434 Vitamin 8/2 and Heme Models, p. 1569... [Pg.1147]

Two self-assembly techniques are predominantly employed in the preparation of catenanes "thermodynamic" self-assembly and self-assembly with covalent "modification."... [Pg.1240]

In self-assembly with covalent modification, conventional organic reactions are typically performed on self-assembled structures in order to lock them into a kinetically stable state." ] For the preparation of catenanes, the self-assembly step is generally used to generate a precursor molecule with a disposition that allows for ready conversion to a kinetically stable catenane structure. The self-assembly step is most often employed to bring about interlocking, giving rotaxane or pseudorotaxane intermediates. These are subsequently converted to catenanes by simple cyclization reactions. [Pg.1241]

One addition to the assembly lexicon added a layer of complexity to the above definition. Thus, one of the seven different classes of self-assembly originally proposed by Lindsey. — which are strict self-assembly processes (with or without a template) positioned in different chemical settings—is commonly known as "irreversible self-assembly." This term is used to describe two-step processes, whereby a strict self-assembly processes is followed by irreversible reactions that covalently knit together the array of subunits. As Whitesides noted, strictly speaking this term is a misnomer. Hence, along with other types of post-assembly modified self-assemblies, we categorize these processes as "self-assembly with covalent modification." Postmodification generally comes in the form of a series of covalent bond formation steps and is of less interest to us here. The crux of any self-assembly process is the self-assembly. [Pg.1372]

Strict Self-Assembly and Self-Assembly with Covalent Modifications... [Pg.1373]

Mirkin et al. recently worked on a slightly different metal-ion-directed self-assembly in which thermodynamically controlled covalent modification is applied to the product. In this approach, the assembly part of this, self-assembly with covalent modification," involves chelate donors and is perhaps best described with the Raymond analysis. However, in contrast, the postmodi-fied products are probably best described using the method proposed by Stang. This double-barreled approach is not ideal and indicates that there is still a large amount of work to be done before a more uniformly applicable description of self-assembly is reached. [Pg.1375]

Strict Self-Assembly and Self Assembly with Covalent Modifications, p. 1372 Strong Hydrogen Bonds, p. 1379 Supramolecular Polymers, p. 1443 Suifactants. Part I Fundamentals, p. 1458 Surfactants, Part II Applications, p. 1470 van der Waals Forces, p. 1550... [Pg.1451]

Self-assembly with post-modification. The most common form of modification that is utilised in synthetic systems is the alteration of a system after the self-assembly step has taken place. Many common systems, such as rotaxanes and catenanes (Section 3.4), are formed from a self-assembled structure, held loosely together by non-covalent interactions, which are locked in place once the self-assembly process is complete by the formation of covalent bonds, much like tying off the ends of a knot. [Pg.113]


See other pages where Self-assembly with modification is mentioned: [Pg.112]    [Pg.112]    [Pg.644]    [Pg.635]    [Pg.635]    [Pg.702]    [Pg.477]    [Pg.139]    [Pg.602]    [Pg.602]    [Pg.669]    [Pg.1372]    [Pg.1374]    [Pg.1378]    [Pg.244]    [Pg.62]    [Pg.82]    [Pg.34]    [Pg.47]    [Pg.63]    [Pg.66]    [Pg.38]    [Pg.346]   


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Modification with

Self-assembly with covalent modification

Self-assembly with post-modification

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