meso-Aryltetrabenzoporphyrins. Synthesis and properties

Main Strategies for the Synthesis of meso-Arylporphyrins

meso-Arylporphyrins as most accessible tetrapyrrole macroheterocycles have always been the focus of attention from researchers concerned with practically useful properties of these compounds. The first syn­theses of meso-arylporphyrins date back to about 90 years ago. Up to now, the yields of these compounds have been improved from 5 to 80%. The present review analyzes different ways and strategies for the synthesis of meso-aryl-substituted porphyrins. The most efficient methods that can be scaled up to an industrial level have been identified.

Metal–organic green dye: chemical and physical insight into a modified Zn-benzoporphyrin for dye-sensitized solar cells

A novel green benzoporphyrin has been synthesized, characterized, studied by theoretical methods and tested in DSSC devices. Ab initio simulations predict the actual charge displacement during S₀ → S₁ excitation.

Regioselective bromination of palladium tetraphenyltetrabenzoporphyrin to benzo-rings: Synthesis of mono- and octabromotetrabenzoporphyrins and their properties

Bromination of palladium meso-tetraphenyl tetrabenzoporphyrin ( Pd Ph4TBP, 1) by Me4NBr3 or Me4NBr/Br2 was shown to proceed regioselectively to the benzo-rings annelated to main porphyrin macrocycle. Conditions for preferential mono- and octa-bromination have been established. The respective mono- and octa-bromide ( Pd Ph4TBP( Br ), 2 and Pd Ph4TBP( Br )8, 3) have been isolated and characterized by UV-vis, NMR and LDI-TOF spectroscopy. Changes of electrochemical properties of tetrabenzoporphyrins induced by Br atoms were found to follow the same trends as the changes in analogous non-extended porphyrins. Room temperature phosphorescence is not substantially influenced by the substitution.