title: The synthesis and spectral investigation of a novel highly water-soluble, aggregation-free antimony(V)-phthalocyanine absorbing light in optical therapeutical window.
abstract: A novel antimony-phthalocyanine, [Sb(H(3)tsppc)(OH)(2)], where H(3)tsppc denotes monodeprotonated tetrakis{(2',6'-dimethyl-4'-sulfonic acid)phenoxyl}phthalocyaninate, has been synthesized through sulfonation of [Sb(tppc)(OH)(2)](+) (tppc denotes tetrakis{(2',6'-dimethyl)phenoxyl}phthalocyaninate) in concentrated sulfuric acid. This compound is highly soluble in water (ca. 4 × 10(-2) M) without surfactant or alcohol. Moreover, it has been found free from aggregation in water up to almost 10(-4) M, unlike its copper and metal-free analogues, and show an intense optical absorption and emission band in optical therapeutical window (700-800 nm). The axial hydroxyl groups play a crucial role in disaggregation of the antimony derivative in water.
authors.affiliation: National Institute for Materials Science, 1-2-1, Sengen, Tsukuba, Ibaraki, 305 0047, Japan. ISAGO.Hiroaki@nims.go.jp
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Isago
authors.forename: Harumi
authors.initials: H
authors.lastname: Fujita
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Sugimori
mesh_terms: D000965:Antimony / Q000737:chemistry*; D002942:Circular Dichroism; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D007211:Indoles / Q000138:chemical synthesis* / Q000737:chemistry; D008027:Light; D012995:Solubility; D013501:Surface-Active Agents / Q000138:chemical synthesis* / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D056831:Coordination Complexes; D007211:Indoles; D013501:Surface-Active Agents; D014867:Water; D000965:Antimony