title: Energy transfer among light-harvesting macrorings incorporated into a bilayer membrane.
abstract: Amphiphilic bis(imidazolyl)tris(porphyrinatozinc) complexes having omega-carboxyalkyl meso substituents were prepared. The barrel-type porphyrin macroring organized through their complementary coordination was incorporated into a liposomal bilayer membrane with orientation normal to the surface. Under the conditions concentrated in the membrane, introduction of a fullerotripyridyl ligand into the cavity of the macroring quenched fluorescence not only from the host ring itself but also from other surrounding macrorings. Energy transfer among antenna macrorings in the membrane mimics the assembly of a bacterial light-harvesting antenna system.
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Nagata
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Kuramochi
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Kobuke
mesh_terms: D040761:Biomimetic Materials / Q000138:chemical synthesis / Q000737:chemistry; D007093:Imidazoles / Q000138:chemical synthesis / Q000737:chemistry; D008051:Lipid Bilayers / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D008665:Metalloporphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D015032:Zinc / Q000737:chemistry*
chemical_list: D007093:Imidazoles; D008051:Lipid Bilayers; D047028:Macrocyclic Compounds; D008665:Metalloporphyrins; D045322:Photosynthetic Reaction Center Complex Proteins; D015032:Zinc