Luminescent sensitization and blue shift emission of Ir(ppy)2(VPHD) by copolymerization with MMA

An, Bao-Li; Dai, Fan-Zeng; Zhang, Yanling; Song, Jian; Huang, Xiaodi; Xu, Jiaqiang

doi:10.1016/j.jlumin.2011.03.064

Cited by 1 publication

(2 citation statements)

References 29 publications

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“…The PL was blue-shifted and the peaks were split in comparison to those of the IrV monomer (Figure S2). This is attributed to the polymerization-induced hindrance of energy transfer at the singlet MLCT state to the triplet MLCT state. , The results show that the polymerization system based on 4VP in toluene is highly efficient at improving the isolation of IrV during the surfactant-free emulsion polymerization, as shown in Figure c.…”

Section: Resultsmentioning

confidence: 86%

“…27 hindrance of energy transfer at the singlet MLCT state to the triplet MLCT state. 28,29 The results show that the polymerization system based on 4VP in toluene is highly efficient at improving the isolation of IrV during the surfactant-free emulsion polymerization, as shown in Figure 1c. Additionally, the effect of 4VP on the self-quenching was investigated by introducing different concentrations of 4VP.…”

Section: ■ Results and Discussionmentioning

confidence: 91%

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In Situ Incorporation of Hydrophobic Emissive Complexes in Monodisperse Copolymer Particles via Surfactant-free Emulsion Polymerization

Lee

Woo

et al. 2020

Macromolecules

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Iridium complex-incorporated monodisperse particles are prepared via surfactant-free emulsion polymerization. For this process, a vinyl-substituted iridium complex (IrV) is synthesized and copolymerized with 4-vinylpyridine (4VP) and methyl methacrylate in an aqueous phase. Toluene is then used as a cargo solvent to transfer the IrV through the aqueous phase in the form of minidroplets. The amphiphilicity of 4VP enhances the transfer efficiency and prevents self-quenching of the copolymerized iridium complexes. The iridium complexes copolymerized in the particles show good photostability for more than 6 months and ∼3.6 times the enhanced photoluminescence quantum yield because of the scattering-induced light extraction effect of the particles. Moreover, phosphorescent three-dimensional photonic crystals (3D PCs) with different photonic band gaps are fabricated by adjusting the size of the emissive monodisperse particles. The phosphorescence of the 3D PC is tuned according to the position of the photonic band gap to reduce the full width at half-maximum by ∼24 nm.

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Section: Resultsmentioning

confidence: 86%