Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Supramolecular metalloporphyrins

Fig. 27. The preparation of a supramolecular peptide nanostructure by the selective complexation of four metalloporphyrins [67]. (Reproduced with the permission of Ref. 1)... Fig. 27. The preparation of a supramolecular peptide nanostructure by the selective complexation of four metalloporphyrins [67]. (Reproduced with the permission of Ref. 1)...
Their properties can be further improved based on the coordination chemistry strategy for supramolecular systems (31, 38, 39, 46, 56, 116, 191, 262-265). For example, one can exploit the electron donor-acceptor and/or ET properties of the ancillary complexes or make use of them as cofactors, creating new pathways for the oxidation of organic substrate (183, 266, 267). In particular, transition metal complexes connected to the periphery of we.so-pyridylporphyrins (268, 269) can modify the stereochemical environment or even modulate the electronic characteristics of the metalloporphyrin center. This aspect was explored in the case of the Mn(4-TRPyP) and Mn(3-TRPyP) systems, because of their contrasting stereochemistry (Fig. 27). [Pg.411]

The most important by-product of the analytic and synthetic work accomplished so far is knowledge about the stereochemistry and reactivity of natural compounds. There is an enormous potential for the chemists of the twenty-first century lying in the mastery and application of this knowledge in order to produce organized and finally functional materials. Typical contemporary examples include surface monolayers on metals and colloids made of fatty acid and steroid derivatives, the regio- and stereoselective assembly reactions between steroids and carbohydrates, coupled redox chains of metalloporphyrins and vitamins, noncovalent fibers made of amino acids, nucleotides, and saccharides, and the functionalization of proteins by incorporation of reactive molecules. The field of supramolecular or noncovalent natural compound chemistry has been scientifically fruitful for several decades and is presently exploited for the development of useful molecular devices and machines as well as for medical applications. [Pg.1]

Finally, a DEER study on models for molecular wires made from butadiyne-linked zinc porphyrin oligomers, end-labeled with nitroxide radicals, was performed by Lovett, Anderson, and coworkers [107]. Unlike in [104—106], one can control the conformations of these metalloporphyrin-based strucmres by self-assembly with multidentate amine ligands, which bend the rigid oligomeric structure. The experimentally found end-to-end distances in these complexes match the predictions from molecular dynamics calculations. This study thus presents a proof-of-principle that DEER spectroscopy is also well suited for understanding more complex supramolecular stmctures. [Pg.85]

Photoinduced electron transfer reactions in supramolecular model systems based on metalloporphyrins 97YGK557. [Pg.248]

Hetero-arrays of porphyrins and phthalocyanines 07CCR2334. Metalloporphyrin hosts for supramolecular chemistry of fullerenes ... [Pg.60]

The triplet states of free-base, zinc-, and ruthenium-porphyrins can be conveniently monitored in nanosecond laser flash photolysis (Fig. 25). The triplet transient spectra exhibit significant differences between the free-base and the metalloporphyrins that can be used for diagnostic pmposes in multi-chromophore supramolecular systems. [Pg.129]

Porphyrins and metalloporphyrins can be exploited in two ways as modules for the construction of supramolecular assembhes. Porphyrins can act... [Pg.171]


See other pages where Supramolecular metalloporphyrins is mentioned: [Pg.226]    [Pg.231]    [Pg.313]    [Pg.633]    [Pg.269]    [Pg.232]    [Pg.229]    [Pg.776]    [Pg.533]    [Pg.913]    [Pg.236]    [Pg.150]    [Pg.201]    [Pg.279]    [Pg.53]    [Pg.355]    [Pg.394]    [Pg.2112]    [Pg.2151]    [Pg.679]    [Pg.684]    [Pg.216]    [Pg.430]    [Pg.431]    [Pg.883]    [Pg.113]    [Pg.2150]    [Pg.147]    [Pg.7]    [Pg.10]    [Pg.99]    [Pg.204]    [Pg.262]    [Pg.81]    [Pg.822]    [Pg.1139]   
See also in sourсe #XX -- [ Pg.61 ]




SEARCH



Metalloporphyrin

Metalloporphyrin metalloporphyrins

Metalloporphyrins supramolecular assembly

© 2024 chempedia.info