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Showing 1 to 20 of 31 for “"Metalloporphyrin"”.
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Robust Microporous Metalloporphyrin Framework Solids
The manganese porphyrin framework, PIZA-5, has been shown to catalyze the hydroxylation of cycloalkanes under liquid-solid conditions, using iodosylbenzene as oxidant. This framework is novel as the catalysis occurs in its pores. No other porphyrin framework solids where catalysis occurs in the …
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Myoglobin Microsperes and Metalloporphyrin -Peptide Complexes
Addition of disulfide bridges and ionic contacts. We have synthesized and characterized a new class of heme-peptide complexes using disulfide-linked tweezers and cyclic peptides. The binding affinities, helicities, and mechanism of binding of linear, tweezers, and cyclic peptides to [Fe …
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"A Metalloporphyrin-Based Colimetric Nose: ""smell-Seeing"
… was miniaturized. Deposition of plasticized metalloporphyrin/polymer films on Teflon posts gave microarrays with faster response times (approximately 20fold) than reverse phase silica arrays at low analyte concentration. A prototype digital ""Smell Camera"" was developed to provide a portable …
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Metalloporphyrin-decorated semiconducting oxides for gas sensing applications
… project has created new solid-state materials of metalloporphyrin-decorated metal oxides for gas sensing applications, directed at the measurement of nitrogen dioxide at low concentration in air. The hypothesis was that metalloporphyrins grafted onto the surface of tin dioxide could act as …
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Artificial and mammalian olfaction and low-coordinate metalloporphyrin complexes
Part 1 A low-cost yet highly sensitive colorimetric sensor array for the detection and identification of toxic industrial chemicals (TICs) has been developed. The sensor consists of a disposable array of cross-responsive nanoporous pigments whose colors are changed by diverse chemical interactions …
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Part I: Peptide Dendrimers From Natural Amino Acids. Part II: Nonfullerene Nanotubes From Bridged Dendritic Metalloporphyrin Complexes
… the formation of bisaxially bridged dendritic metalloporphyrin complexes and a successive application of the ""cored dendrimer"" method. Each reaction was monitored by UV-Vis spectroscopy, 1H NMR spectroscopy, MALDI-MS, and SEC. Upon core removal, average mass loss of 734 Da (tin porphyrin …
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Synthesis Of Novel Ionic Liquid Tagged Porphryin Media Designed For The Oxidation Of Lignin
… this end, we have developed ionic liquid tagged metalloporphyrin catalysts and coupled them in ionic liquids that are known to dissolve lignin in an attempt to more efficiently isolate the feedstock chemicals contained within lignin. Synthesis of four ionic liquid tagged metalloporphyrin …
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Photochemistry of metalloporphyrins
Metalloporphyrins serve many functions in biological systems. Their important roles in the reduction of oxoanions such as nitrite and sulfite in bacteria and in the oxidation of organic substrates by cytochrome P450 has prompted our current investigations into the photochemistry of several …
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Porphyrin Network Materials: Chemical Exploration in the Supramolecular Solid-State
… PIZA-2 and PIZA-3. Containing near-planar metalloporphyrin macrocycles, PIZA-2 and PIZA-3 manifest lower void volumes (56%).
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Shape Selective Oxidations of Hydrocarbons
… selectivity was used as a sensitive probe for metalloporphyrin involvement in the hydroxylation transition state. Both tert-butylhydroperoxide and trifluoroethanol solubilized pentafluoroiodosobenzene were found not to be shape selective with manganese porphyrin catalysts indicating radical …
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Harnessing inorganic coordination chemistry for novel sensing applications
… on carbon nanotubes. In Chapter 2, we employ metalloporphyrin complexes bearing late first-row transition metal centers in composites with single-walled carbon nanotubes (SWCNTs) in a chemiresistive sensor array capable of classifying various volatile organic compounds (VOCs) through the use …
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Theoretical and Experimental Investigations of Chemical Shielding in Amino Acids, Proteins and Model Compounds
… in proteins and solid state polypeptides, while metalloporphyrin model compounds have been studied to provide insight into small ligand binding in respiratory metalloproteins. The results of these investigations lend considerable support to the continued use of theoretical methods in NMR …
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Biologically inspired materials for electro-responsive coatings and the photo-oxidation of water
… by a peptide expressed on the M13 bacteriophage; metalloporphyrin photosensitizers that are covalently assembled on the protein framework of the bacteriophage; and a synthetic Ce(IV) dipicolinate electron accepting molecule. The electron accepting molecule, developed to fill the role of …
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Ultrafast linear and non-linear spectroscopy : from biological light-receptors to artificial light-harvesting systems
… the first studies applying this technique to a a metalloporphyrin and an artificial light-harvesting antenna.
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Porphyrins and metalloporphyrins as field-responsive materials
{\it Part I}. {\it Metalloporphyrin coordination polymers}. One-dimensional coordination polymers of metalloporphyrins with non-symmetric bridging ligands have been synthesized as candidates for molecular ferroelectric materials. These include the iron(II) porphyrinate polymer: \lbrack Fe$\sp{\rm …
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Electron paramagnetic resonance and resonance Raman spectroscopic investigations of the ferric ligand complexes and the oxidized intermediates of catalase and bromoperoxidase
… to an A$\sb{2\rm u}$ $\pi$ cation radical for metalloporphyrin model compounds.
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Investigations of Electron Transport Properties in Metal-Organic Frameworks for Catalytic Applications
… frameworks. Specifically, the incorporation of metalloporphyrin molecules with redox active metal centers coupled with the presence of redox active metal nodes resulted in redox hopping charge transport throughout the MOF. In addition, the presence of solvent molecules in the pores of the …
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