Self-aggregation of synthetic zinc chlorins possessing 'inverse' keto and hydroxyl groups

Article abstract of DOI:10.1016/S0040-4039(96)02278-2

Zinc 3-acetyl-13¹-hydroxychlorin Zn-4 was efficiently prepared as a model for naturally occurring bacteriochlorophyll-d possessing 3¹-hydroxyl and 13-keto groups. Synthetic model Zn-4 self-aggregates to form oligomers in non-polar organic solvents as well as the isomeric zinc 3¹-hydroxy-13¹-oxochlorin Zn-1. Both the in-vitro aggregates are similar with the in-vivo aggregates of bacteriochlorophyll-d in the main light-harvesting antennae of photosynthetic green bacteria.