In the present work, first data on catalytic activity of d-metal complexes petroleum porphyrins obtained via two-stage re-metallization (acid demetallization with subsequent metalation) high-purity vanadyl are presented. During acid porphyrins, highest yield (49%) and spectral purity free petroporphyrin bases were achieved concentrated sulfuric a diluted solution in chloroform. series divalent ...

Conductive polymers are widely used as active and auxiliary materials for organic photovoltaic cells due to their easily tunable properties, high electronic conductivity, light absorption. Several conductive show the cathodic photogalvanic effect in pristine state. Recently, photoelectrochemical oxygen reduction has been demonstrated nickel complexes of Salen-type ligands. Herein, we report an ...

Porphyrins are important macrocycles with applications in several areas including therapy, catalysis, and sensing. Strong nonlinear optical (NLO) responses the key to fully exploiting potential of these biocompatible molecules. We herein report that certain metal-alkynyl donor/nitro acceptor-functionalized porphyrins attractive candidates for NLO applications. show specific examples exhibit rec...

The success of the photocatalytic CO2 reduction using sunlight depends on how visible light is captured and utilized. Zn porphyrins, which are synthetic analogues chlorophyll bacteriochlorophyll, have very intense absorption bands in region high potential candidates as photosensitizers for reduction. However, use zinc porphyrins had been limited due to their poor stability under conditions. We ...

The occurrence of porphyrins in diphtheria toxin is well known (for references, see A. M. Pappenheimer, J. Biol. Chem. 167:251, 1947). In toxoid, the porphyrins remain as red pigments which, unless removed before the addition of alum, impart a red color to the final alum-precipitated toxoid. Removal of the porphyrins as a first step was examined by L. B. Holt (Developments in Diphtheria Prophyl...