Regioselective bromination of palladium tetraphenyltetrabenzoporphyrin to benzo-rings. Synthesis of mono- and octabromotetrabenzoporphyrins and their properties. sent toстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация: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.