title: Metallophthalocyanines as triplet sensitizers for highly efficient photon upconversion based on sensitized triplet-triplet annihilation.
abstract: Soluble palladium and platinum phthalocyanines with coumarin moieties were synthesized with Q bands in the red and near-IR regions, in which the molar extinction coefficients were up to 1.01 × 10(5) cm(-1) mol(-1). These metallophthalocyanines were coupled with rubrene and applied in photon upconversion systems based on triplet-triplet annihilation. The highest upconversion efficiency of the palladium phthalocyanine was 5.6%, which is higher than that of the platinum phthalocyanine-rubrene system. The larger molar extinction coefficient resulted in high upconversion capability (>10(5) cm(-1) mol(-1)) and low saturation incident power (<20 mW cm(-2)).
authors.affiliation: Tianjin University, School of Chemical Engineering and Technology, Tianjin 300072, China. Youj1983@tju.edu.cn.
authors.forename: J L
authors.initials: JL
authors.lastname: Han
authors.forename: J
authors.initials: J
authors.lastname: You
authors.forename: H
authors.initials: H
authors.lastname: Yonemura
authors.forename: S
authors.initials: S
authors.lastname: Yamada
authors.forename: S R
authors.initials: SR
authors.lastname: Wang
authors.forename: X G
authors.initials: XG
authors.lastname: Li
mesh_terms: D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D009279:Naphthacenes / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D011789:Quantum Theory; D013055:Spectrophotometry, Infrared
chemical_list: D007211:Indoles; D054833:Isoindoles; D009279:Naphthacenes; D010984:Platinum; C045049:rubrene; D010165:Palladium; C013647:phthalocyanine