title: Photophysical properties of sulfonated dihydroxy phosphorus(V) tetrabenzotriazacorrole.
abstract: The photosensitizing properties of a novel phthalocyanine analogue, sulfonated dihydroxy phosphorus(V) tetrabenzotriazacorrole [P(OH)2TBCSn] and a non-sulfonated one [P(OH)2TBC] are reported in this paper. Different from other phthalocyanine derivatives, P(OH)2TBCSn shows little aggregation in aqueous solution. The fluorescence quantum yield (PhiF) of P(OH)2TBCSn is lower than that of the non-sulfonated one. Studies of triplet state photophysics show that the presence of peripheral substituents on the macrocycle enhances the quantum yield of the triplet state. The sulfonated derivative, P(OH)2TBCSn, has a longer triplet lifetime (tauT = 0.234 ms) and higher singlet oxygen quantum yield (PhiDelta = 0.88) than P(OH)2TBC. Together with the ground-state absorption properties, the photosensitizing properties of the new compound suggest that it may be used as an excellent photosensitizer for photodynamic therapy (PDT).
authors.affiliation: The Key Lab of Organic Photoelectrons and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Huang
authors.forename: Peng
authors.initials: P
authors.lastname: Zhao
authors.forename: Zhongyu
authors.initials: Z
authors.lastname: Li
authors.forename: Fushi
authors.initials: F
authors.lastname: Zhang
authors.forename: Chen-Ho
authors.initials: CH
authors.lastname: Tung
mesh_terms: D000042:Absorption; D002021:Buffers; D007211:Indoles / Q000138:chemical synthesis / Q000737:chemistry*; D054833:Isoindoles; D009943:Organophosphorus Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D017785:Photons; D017319:Photosensitizing Agents / Q000138:chemical synthesis / Q000737:chemistry*; D012995:Solubility; D013050:Spectrometry, Fluorescence; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D002021:Buffers; D007211:Indoles; D054833:Isoindoles; D009943:Organophosphorus Compounds; D017319:Photosensitizing Agents; D014867:Water; D010100:Oxygen; C013647:phthalocyanine