title: Synthesis and photophysical properties of peripherally and non-peripherally mercaptopyridine substituted metal free, Mg(II) and Al(III) phthalocyanines.
abstract: The syntheses and photophysical properties of metallophthalocyanines containing Mg(2+) and Al(3+) as central metal ions and their unmetallated derivative (complexes 3-8) tetra- substituted at the non-peripheral (α) and peripheral (β) positions with 2-mercaptopyridine are reported. The trends in triplet and fluorescence quantum yields are described for these compounds. The complexes exhibited relatively high triplet quantum yields (Φ(T)) ranging from 0.33 to 0.54 and fluorescence quantum yields (Φ(F)) ranging from 0.02 to 0.29. Triplet state lifetimes of the complexes were long ranging from 120 to 460 μs, indicating a potential use of these complexes as photosensitizers.
authors.affiliation: Department of Chemistry, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa.
authors.forename: Yasin
authors.initials: Y
authors.lastname: Arslanoğlu
authors.forename: Mopelola
authors.initials: M
authors.lastname: Idowu
authors.forename: Tebello
authors.initials: T
authors.lastname: Nyokong
mesh_terms: D000042:Absorption; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004583:Electrons; D007211:Indoles / Q000737:chemistry*; D008027:Light; D008274:Magnesium / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D055585:Physical Phenomena; D011725:Pyridines / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence
chemical_list: D007211:Indoles; D009942:Organometallic Compounds; D011725:Pyridines; D012997:Solvents; C060570:aluminum phthalocyanine; C029347:2-thiopyridine; D008274:Magnesium; D004121:Dimethyl Sulfoxide