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Showing 1 to 20 of 128 for “"porphyrins"”.
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Synthetic porphyrins as oxygen-carriers
… have usually been derivatives of mesosubstituted porphyrins. In contrast, the porphyrins used in this work were of the natural etio-substituted types, for these are potentially closer mimics of the enzymes' prosthetic groups. Methods are given for the synthesis of porphyrins having two, three , or …
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SOLID-SUPPORTED PORPHYRINS FOR CATALYSIS AND SENSING
… developed the possibility of grafting anionic porphyrins onto ColourCatcher® (CC) sheets, a laundry item used for capturing leaking dye during washes. CC is composed of a non-texture sheet made of cellulose and other natural fibres, and its surface is functionalised with organic ammonium groups …
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Porphyrins as second order nonlinear optical materials
… unusually high thermal and chemical stability of porphyrins as well as their very large $\pi$-conjugated systems, three classes of high $\beta$-value push-pull porphyrins were synthesized and subsequently successfully engineered into Langmuir-Blodgett (LB) films for a systematic evaluation of …
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Porphyrins and metalloporphyrins as field-responsive materials
… 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$\sp{\rm II}$(TPP)(pyCN)\rbrack$\sb\infty$ (where TPP = …
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Reactivity of nickel porphyrins in catalytic hydrodemetallation
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1984.
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Synthetic Iron Porphyrins as Models for Heme Proteins
… (where Por can be one of several tetraarylporphyrins) can be further oxidized to yield (FePor)(,2)N('2+), a stable iron(IV) porphyrin pi-cation radical. The electronic structure of these species is dependent on the counterions and porphyrin substituents.
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Quantum Theory of Electron Transport Through Photo-Synthetic Porphyrins
Optoelectronic properties of metallo-porphyrins play a central role in photosynthesis and are therefore crucial to life on earth. This thesis presents a series of studies into the electronic and thermoelectric properties of various families of molecular junction of metalloporphryins Two main …
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Covalently Linked Dyads and Triads of Phthalocyanines and Porphyrins
… to a variety of metallo- and free-base porphyrins and phthalocyanines. The fourth aim was synthesis of a trimeric porphyrin with flexible linkages and different metal centres (to allow further selective complexation). All the results of this synthesis are presented together in chapter 2, …
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Competitive metallation of porphyrins by vanadyl and nickel ions
Includes bibliographical references (pages 55-56).
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Electrocatalytic CO2 Reduction by Self-Assembled Monolayers of Metal Porphyrins
… by attaching alkyne-terminated metal (Fe, Co) porphyrins via click chemistry to azide-terminated alkyl phosphate self-assembled monolayers (SAMs) on ITO and FTO electrodes. The electrochemistry of these CO2 reduction systems is studied using cyclic voltammetry and chronoamperometry, and …
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Selective Oxidations by Iron(III) Porphyrins and Iron(III) Corroles
<p>The selective oxidation of organic compounds represents a leading technology for chemical industries. They are used in chemical synthesis in the pharmaceutical and petrochemicals industries, and possible the decontamination of harmful substances. However, oxidations reaction are among the most …
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Kinetics and diffusion in hydrodemetallation of nickel and vanadium porphyrins
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1980.
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