title: The excited states of covalently linked dimeric porphyrins. I: The excited singlet states.
abstract: The ground state absorbance and emission properties of a series of covalently linked biporphyrins were studied, in both their neutral and dicationic forms. The fluorescence quantum yields determined are comparable in value with that obtained from haematoporphyrin IX. Soret band splitting is observed for porphyrin rings separated by a hydrocarbon chain containing 0-3 carbons joined at the beta,beta' ring positions. The biporphyrin linked directly at the meso position shows considerable steric hindrance and behaves like two independent chromophores.
authors.affiliation: Department of Chemistry and Chemical Engineering, Royal Military College of Canada, Kingston, Ontario.
authors.forename: Y F
authors.initials: YF
authors.lastname: Chow
authors.forename: D
authors.initials: D
authors.lastname: Dolphin
authors.forename: J P
authors.initials: JP
authors.lastname: Paine
authors.forename: D
authors.initials: D
authors.lastname: McGarvey
authors.forename: R
authors.initials: R
authors.lastname: Pottier
authors.forename: T G
authors.initials: TG
authors.lastname: Truscott
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006415:Hematoporphyrins; D010777:Photochemistry; D013050:Spectrometry, Fluorescence
chemical_list: D006415:Hematoporphyrins