title: Preparative, analytical and fluorescence spectroscopic studies of sulphonated aluminium phthalocyanine photosensitizers.
abstract: Fluorescence spectroscopic studies were carried out on aluminium phthalocyanine with defined numbers (mono, di, tri and tetra) of sulphonate groups. Selective sulphonation was achieved using one of two synthetic methods to prepare a mixture of components which were separated using reverse-phase liquid chromatography. Fluorescence lifetimes were measured in methanol and buffer solution using time-correlated single-photon counting with picosecond laser excitation; the lifetime shows little variation with the number of sulphonate groups. Using steady state excitation, fluorescence quantum yields were determined for the tetrasulphonated component (phi F = 0.51) and, for comparison, unsulphonated aluminium phthalocyanine.
authors.affiliation: Department of Chemical Physics, Charles University, Prague, Czechoslovakia.
authors.forename: M
authors.initials: M
authors.lastname: Ambroz
authors.forename: A
authors.initials: A
authors.lastname: Beeby
authors.forename: A J
authors.initials: AJ
authors.lastname: MacRobert
authors.forename: M S
authors.initials: MS
authors.lastname: Simpson
authors.forename: R K
authors.initials: RK
authors.lastname: Svensen
authors.forename: D
authors.initials: D
authors.lastname: Phillips
mesh_terms: D007211:Indoles / Q000032:analysis / Q000138:chemical synthesis / Q000737:chemistry*; D009942:Organometallic Compounds / Q000032:analysis / Q000138:chemical synthesis / Q000737:chemistry*; D010777:Photochemistry; D011838:Radiation-Sensitizing Agents / Q000737:chemistry; D013050:Spectrometry, Fluorescence
chemical_list: D007211:Indoles; D009942:Organometallic Compounds; D011838:Radiation-Sensitizing Agents; C060570:aluminum phthalocyanine