title: Luminescent Tungsten(VI) Complexes: Photophysics and Applicability to Organic Light-Emitting Diodes and Photocatalysis.
abstract: The synthesis, excited-state dynamics, and applications of two series of air-stable luminescent tungsten(VI) complexes are described. These tungsten(VI) complexes show phosphorescence in the solid state and in solutions with emission quantum yields up to 22 % in thin film (5 % in mCP) at room temperature. Complex 2 c, containing a 5,7-diphenyl-8-hydroxyquinolinate ligand, displays prompt fluorescence (blue-green) and phosphorescence (red) of comparable intensity, which could be used for ratiometric luminescent sensing. Solution-processed organic light-emitting diodes (OLEDs) based on 1 d showed a stable yellow emission with an external quantum efficiency (EQE) and luminance up to 4.79 % and 1400 cd m-2respectively. These tungsten(VI) complexes were also applied in light-induced aerobic oxidation reactions.
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
authors.forename: Kwan-Ting
authors.initials: KT
authors.lastname: Yeung
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
authors.forename: Wai-Pong
authors.initials: WP
authors.lastname: To
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
authors.forename: Chenyue
authors.initials: C
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.|HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518053, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.|School of Chemistry and Chemical engineering, Shenzhen University, Shenzhen, 518060, China.
authors.forename: Chensheng
authors.initials: C
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
authors.forename: Glenna So Ming
authors.initials: GS
authors.lastname: Tong
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.|HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518053, China.
authors.forename: Chi-Ming
authors.initials: CM
authors.lastname: Che
keywords: dual fluorescence-phosphorescence; organic light-emitting devices; phosphorescence; photocatalysis; tungsten