ISSN:
1434-193X
Keywords:
Porphyrinoids
;
Light-harvesting structures
;
Energy transfer
;
Nanostructures
;
Photochemistry
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
-The synthesis of niphaphyrins, a new class of rigid, snowflake-shaped porphyrin hexamers designed to mimic the light-harvesting antenna complexes of photosynthetic purple bacteria, is described. In these D6- or D3-symmetric assemblies, six porphyrin macrocycles, as free bases or as zinc chelates, are covalently attached to the six positions of a benzene core through rigid ethynyl linkers. A very efficient singlet excited-state energy transfer has been observed from the Zn chelates to the free-base porphyrin (Fb) chromophores in a niphaphyrin in which three zinc porphyrin chelates alternate with three porphyrin free bases. The overall yield of energy transfer (ΦET) has been estimated as 98%.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
Permalink
