Results 181 to 190 of about 76,963 (249)

Carbon Dioxide Reduction by Iron Hangman Porphyrins

Organometallics, 2018
Iron hangman porphyrins with phenol, guanidinium, and sulfonic acid proton donor groups placed above the Fe porphyrin platform reduce CO2 to CO with Faradaic efficiencies >93%.
Charles G. Margarit, C. Schnedermann, Naomi G. Asimow, D. Nocera   +3 more
semanticscholar   +1 more source

Porphyrins and flavins as endogenous acceptors of optical radiation of blue spectral region determining photoinactivation of microbial cells.

Journal of Photochemistry and Photobiology. B: Biology, 2018
It is shown that exposure of suspensions of gram-positive Staphylococcus aureus, gram-negative Escherichia coli and yeast-like fungi Candida albicans to laser radiation of blue spectral region with 405 and 445 nm causes their growth inhibition without ...
V. Plavskii, A. Mikulich, A. Tretyakova, I. Leusenka, L. Plavskaya, O. A. Kazyuchits, I.I. Dobysh, T. P. Krasnenkova   +7 more
semanticscholar   +1 more source

Cavitand−Porphyrins

Journal of the American Chemical Society, 2001
The synthesis and characterization of new nanoscale container molecules 7 and 8 are described. They are covalent hybrids of deepened, self-folding cavitands and metalloporphyrins. In receptor 7, the Zn-porphyrin wall is directly built onto the cavitand skeleton.
S D, Starnes, D M, Rudkevich, J, Rebek
openaire   +2 more sources

Tetrathiafulvalene Porphyrins

Chemistry – A European Journal, 2008
AbstractFour tetrathiafulvalene (TTF)‐annulated porphyrins 1–4 were synthesized and characterized. All contain a tetraphenylporphyrin (TPP) core onto which four, two, or one TTF subunits were annulated. Absorption and fluorescence spectroscopic studies together with electrochemical investigations reveal that interactions between the porphyrin system ...
Nielsen, Kent-A., Levillain, Eric, Lynch, Vincent-M., Sessler, Jonathan-L., Jeppesen, Jan-O.   +4 more
openaire   +4 more sources

Schiff Base Porphyrin and Expanded Porphyrin Analogues

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Wyeth B. Callaway, Jacqueline M. Veauthier, Jonathan L. Sessler   +2 more
openaire   +1 more source

Hole Mobility in Porphyrin- and Porphyrin-Fullerene Electropolymers

The Journal of Physical Chemistry B, 2012
Charge transport within films of several new types of electropolymerized porphyrin and porphyrin-fullerene dyad polymers was studied in order to obtain information on the suitability of these organic semiconductors for applications in solar energy conversion, sensor devices, etc.
Bradley J, Brennan, Paul A, Liddell, Thomas A, Moore, Ana L, Moore, Devens, Gust   +4 more
openaire   +2 more sources

Porphyrins and Hepatotoxicitya

Annals of the New York Academy of Sciences, 1987
Human porphyrias are rare inborn disorders of porphyrin metabolism. Porphyria cutanea tarda is one such disorder, which may occur spontaneously after the ingestion of drugs and alcohol. This is the "constitutional" type and is associated with a deficiency of uroporphyrinogen decarboxylase in the liver.
openaire   +2 more sources

The Biochemistry of the Porphyrins

Clinics in Haematology, 1980
SUMMARY This chapter has reviewed the means by which haem and porphyrins are synthesized and degraded, and some of the biological roles of these compounds. It has also dealt with systems of control of the biosynthetic pathway, and the importance of these control mechanisms in cellular homeostasis.
openaire   +2 more sources

Porphyrins, porphyrin metabolism and porphyrias. I. Update

Scandinavian Journal of Clinical and Laboratory Investigation, 2000
The biosynthesis of porphyrins is one of the most conserved parthways known, about the same sequence of reactions taking place in all species. By associating different metals, porphyrins give rise to the "pigments of life": chlorophyll, haem and cobalamin.
openaire   +2 more sources

Porphyrins. VIII. A stepwise synthesis of porphyrins

Australian Journal of Chemistry, 1964
1,2,3,4,5,6,7,8-Octanlethylporphin and a,?,1,2,3,4,5,6,7,8-decamethylporphin have been prepared by the acid-catalysed condensation of 5,5'-diformyl-3,4,3',4'-tetramethylmethanes (VI; R = H or CH3) with the corresponding dicarboxylic acid derivatives (VII), followed by oxidation.
GM Badger, RA Jones, RL Laslett
openaire   +1 more source