Electronic absorption, florescence excitation and AFM studies of selected homogeneous solutions and thin films of mesotetrakis (parahydroxyphenyl) porphyrin (THPP) (1), mesotetrakis (2, 3- dihydroxyphenyl) porphyrin 2, 3-OHPP) (2), mesotetrakis (3, 4-dihydroxyphenyl) porphyrin (3, 4-OHPP) (3) as well as Zn(II) derivative of 2, 3-OHPP (4) under UV lamp and green laser irradiation (532 nm) are ac...

Reductive ring contraction of 1,3-diphenyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yls (Blatter's radicals) using zinc powder (2 equiv.) in acetic acid heated to ca. 118 °C gives 1,2-diphenylbenzimidazoles in high yield. 1,3-Diphenylbenzo[e][1,2,4]triazin-7(1H)-one and the zwitterionic tetraphenylhexaazaanthracene (TPHA) also undergo reductive ring contractions to give 1,2-diphenylbenzimidaz-6-ol a...

Reaction of a tetraphenyl-1,2-diphosphinyl dianion with [FeCl2(THF)1.5] or [Ru(COD)(acac)2] yields dianionic complexes which further react with Ph3SnCl to afford the corresponding bis(1,4-diphosphabutadiene) complexes.

porophyrins and their metal derivatives are strong dna binders with association constant of  to  . some of these compounds have been used for the radiations sensitization therapy of cancer and are targeted to interact with cellular dna. binding of porphyrins to dna changes the expectral and other physic chemical characteristic of porphyrins, the mode of binding can be extracted from inspection ...

A novel potentiometric ion-selective PVC membrane sensor for analysis of atorvastatin (AT) in pharmaceutical preparations based on atorvastatin-(tetraphenyl borate), (AT-(TPB)2) as sensing element, tetraphenyl borate as additive and tris-2-ethyl-hexyl phosphate (TOP) as plasticizer solvent was prepared. The electrode shows a good Nernestian response over the concentration range of 0.09-5586 μg ...

Abstract. Porphyrin rings containing two meso-pyridyl groups either in cis or trans fashion can be used to construct Re(I) bridged multiporphyrin assemblies. The cis-dipyridyl porphyrins with various porphyrin cores such as N4, N3O, N3S, N2S2 have been used to react with Re(CO)5Cl in THF at refluxing temperature and constructed planar Re(I) bridged porphyrin dyads containing either one type of ...

Two types of porphyrin free base, meso-tetra(4-vinylphenyl)porphyrin and meso-tetra(4-stilbenyl)porphyrin, were synthesized and characterized. Metallation was achieved by insertion of MnCl24H2O. Oxidative electropolymerization of the manganese porphyrin monomers by cyclic scans would anchor the resulting materials on glassy carbon electrodes. It was found that both poly (manganese tetra(4-vinyl...

effects of imidazoles and substituted pyridines and pure s-donors on the oxidation of cyclooctene with naio4 by 5,10,15,20-tetraphenylporphyrinato-manganese(iii) acetate, mn(tpp)oac, and 5,10,15,20-tetramesitylporphyrinato-manganese(iii) acetate, mn(tmp)oac, catalysts in ch2cl2-h2o solvent are studied. coordination of the nitrogen donors to the mn-catalysts generally caused a reduction in the e...

in order to shed more light on the effect of peripheral groups of porphyrin core intophysicochemical properties and dna binding behavior of porphyrins, we have chosen toinvestigate solution properties and calf thymus dna binding behavior of meso-tetrakis (4-nbenzyl-pyridyl) porphyrin (tbzpyp) and its mn (iii), co (iii), ni (ii) and cu (ii) complexesderivatives have been studied in thermodynamic...

2-Borylated porphyrins reacted with Pt(cod)Cl2 to give b-to-b platinum-bridged porphyrin dimers, which were converted to b-to-b directly linked porphyrin dimers through triphenylphosphine-mediated reductive elimination. Similar reactions of 2,18-diborylated Ni(II)–porphyrin and Zn(II)–porphyrin gave the corresponding doubly b-to-b platinum-bridged porphyrin dimers. Treatment of the doubly b-to-...