Iron tetraphenylporphyrin

Shi C, Anson EC. 1990. Catalytic pathways for the electroreduction of oxygen by iron tetra-kis(4-iV-methylpyridyl)porphyrin or iron tetraphenylporphyrin adsorbed on edge plane pyrol3dic graphite electrodes. Inorg Chem 29 4298. 

SAMFETs have also been used in chemical sensing. The a-substituted quincpiethiophene SAMFETs were covered with a 10-nm pinhole-riddled iron tetraphenylporphyrin chloride layer, that acts as a receptor to nitric oxide (NO), an important biomarker [74]. The threshold voltage, measured by the FET transfer characteristics with the porphyrin receptor shifts upon increased exposure to NO. Annealing the monolayer FET in vacuum restores the initial FET behavior. Also, in the single monolayer HBC assembled FETs between metallic SWCNT source and drain electrodes increased current levels were measured in /d-Fds and Aj-Fg characteristics (Fig. 9) upon exposure to solutions of the electron acceptor TCNQ [68]. While the mechanism of response is not known, TCNQ has an affinity for coronene, and likely gives rise to charge transfer between electron-deficient TCNQ... 

In this paper we will comment on the background of the method, and illustrate its application with a series of studies on iron phthalocyanine and iron tetraphenylporphyrins. 

A possible model of hemoprotein-peroxide complexes formed in an iron-tetraphenylporphyrin system. Biochem. Biophys. Res. Commun. 135, 972-978. 

The likelihood that alkyl radicals, like their aryl counterparts, bind to the iron before shifting to the nitrogen is supported by the observation that the type II complexes formed between alkyldiazenes and P450 in the absence of oxygen are converted, in the presence of limited amounts of oxygen, to complexes with an absorption maximum at 480 nm characteristic of iron-carbon o-bonded complexes Furthermore, alkyl diazene-iron tetraphenylporphyrin complexes can be prepared under anaerobic conditions. However, the alkyl-iron complexes are much less stable and less well characterized than the aryl-iron complexes and their involvement in heme iV-alkylation reactions remains to be demonstrated. 

Scheme 6-19 N-atom transfer catalyzed by manganese or iron tetraphenylporphyrin.

The systems composed of iron tetraphenylporphyrins with halogenated phenyl and pyrrole rings in dichlorbmethane solutions were used for oxidation of cyclohexane with monopero-xyphthalic acid magnesium salt at room temperature. Bu NCl was... 

Gopakumar TG, Tang H, MoriUo J, Bemdt R (2012) Transfer of Q ligands between adsorbed iron tetraphenylporphyrin molecules. J Am Chem Soc 134 11844-11847. doi 10.1021/ja302589z... 

It is convenient to consider, in the first place, the application of ISM to the electron self-exchange in synthetic models of cytochrome c, in order to avoid the difficulties introduced by the AG dependence and the structural complexity. For the couple iron tetraphenylporphyrin bis-1-methylimidazole, FeTPP(l-MeIm)2 /+ the electron self-exchange rate of 8.1x10 7 -1 s... 

SWCNTs-porphyrin nanosensors have been fabricated for monitoring toxic substances in the enviromnent [215], Free-base, Ru and Fe octaethyl-and tetraphenyl-substituted porphyrins provided good selectivity and sensitivity to various VOCs tested (acetone, butanone, methanol, ethanol). Nonco-valently functionalized SWCNTs with iron tetraphenylporphyrin were used for benzene detection [216], SWCNTs noncovalently functionalized with copper phthalocyanine and free-base porphyrins were used as sensing layers for the detection of toluene [217]. Also, MWCNTs were used as sensors for benzene, toluene, and xylene, when fnnctionalized with metal tetraphenyl porphyrins [218], SWCNTs-poly(tetraphenylporphyrin) hybrid was prepared and tested as a low-power chemiresistor sensor for acetone vapor [219]. A chemiresistive sensor array was fabricated from SWCNTs noncovalently functionalized with metallo mcxo-tetraphenylporphyrins (Cr(III), Mn(III), Fe(III), Co(III), Co(n), Ni(n), Cu(II), and Zn(II)) [220]. Its responses were treated by statistical analyses and allowed to classify VOCs into five classes alkanes, aromatics, ketones, alcohols, amines. Amines detection as an indicator of meat spoilage was achieved by the same group with the same sensor array [221]. 

Olsen, M., Salomao, G., Drago, V., et al. (2005). Oxidation of cyclohexane in supercritical carbon dioxide catalyzed by iron tetraphenylporphyrin, J. Supemrit. Fluid, 34, pp. 119-124. 

Feng D, Schultz FA (1988) Relationship between structural change and hettnogeneous electron-transfCT rate constant in iron-tetraphenylporphyrin complexes. Inorg Chem 27 2144-2149... 

Schappacher M, Deffieux A (2011) Reversible switching between linear and ring poly(EO)s bearing iron tetraphenylporphyrin ends triggered by solvent, pH, or redox stimuli. Macro-molecules 44 4503-4510... 

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