Journal article

Chemical models for aspects of the photosynthetic reaction centre: synthesis and photophysical properties of tris- and tetrakis-porphyrins that resemble the arrangement of chromophores in the natural system

MJ Crossley, PJ Sintic, JA Hutchison, KP Ghiggino

ORGANIC & BIOMOLECULAR CHEMISTRY | ROYAL SOC CHEMISTRY | Published : 2005

Abstract

Tris-porphyrin and tetrakis-porphyrin arrays 1 and 2 are proposed as models for the arrangement of the chromophores that constitute photosynthetic reaction centres (PRC's). Their porphyrinic chromophores are similar in distance apart to the key chromophores of PRC's and the C2 symmetric arrangement of the macrocycles that constitute the 'special pair' where charge separation occurs is also incorporated. The use of zinc(II) and gold(III) chelation establishes an energy gradient for photoinduced electron transfer across each compound. Synthesis was achieved in good yields through a strategy that used the construction of biquinoxalinyl and Tröger's base linkages between the porphyrinoid compone..

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