Synthesis and luminescent properties of block copolymers based on polyfluorene and polytriphenylamine

Tan, Ying; Gu, Zhijie; Tsuchiya, Kousuke; Oginö, Kazuhíde

doi:10.1016/j.polymer.2012.02.021

Cited by 19 publications

(22 citation statements)

References 32 publications

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“…As shown in Figure 2(a), signals for phenoxazine protons appeared around 6.6 ppm. In order to obtain a target block copolymer (PF-Ph-PTAA) consisting of PF and PTAA functionalized with green emitting phenoxazine moiety at the junction point of two blocks, C-N coupling polymerization of 6 was conducted in the presence of PF1 using palladium acetate and tri(tert-butyl) phosphine ligand, and tert-butoxide as a base in THF for 24 h in the similar manner we reported [9,15]. As shown in Figure 2(b), two types of methyl signals around 0.85 ppm, and N-H signal from polymer ends (5.7 ppm) were observed indicating the introduction of TAA unit as expected.…”

Section: Device Fabricationmentioning

confidence: 99%

“…As shown in Figure 2(b), two types of methyl signals around 0.85 ppm, and N-H signal from polymer ends (5.7 ppm) were observed indicating the introduction of TAA unit as expected. Table 1 lists the characteristics of prepared polymers together with the data for PF-b-PTAA, which is a previously prepared block copolymer without phenoxazine units [9,10].…”

Section: Device Fabricationmentioning

confidence: 99%

“…More recently Tan et al synthesized the different type of block copolymers for EL applications via the Suzuki coupling polymerization followed by the C-N coupling polymerization [9,10], which consisted of light emitting and electron transporting polyfluorene (PF) unit and hole transporting polytriarylamine (PTAA) unit. It was revealed that the introduction of PTAA increased emission efficiencies compared with PF homopolymer.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 illustrates the synthetic route of targeted polymers. n-Butylphenylphenoxazine (1) [14], 2,7-dibromo-9-(4-methylphenyl)-9-(4-octylphenyl)-fluorene (4) [9], 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9-(4-methylphenyl)-9-(4-octylphenyl)-fluorene (5) [9], 4-(4'-bromophenyl)-4"-butyl-diphenylamine (6) [15] were synthesized according to reported procedures. All reagents and solvents were used without further purification unless stated otherwise.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Polyfluorene-Polytriarylamine Block Copolymer with Emitting Part at Junction Point for Light Emitting Applications

Jahanfar¹,

Suwa²,

Tsuchiya³

et al. 2013

OJOPM

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A block copolymer consisting of polyfluorene (PF) and polytriarylamine (PTAA) functionalized with green emitting phenoxazine moiety at the junction point of two blocks was designed and prepared for electroluminescent application. PF homopolymer was synthesized by Suzuki coupling polymerization, and was reacted with brominated phenoxazine. In the presence of the resulting PF functionalized with phenoxazine, C-N coupling polymerization of 4-(4'-bromophenyl)-4''-butyldiphenylamine was carried out to afford a triblock copolymer, PTAA-phenoxazine-PF-phenoxazine-PTAA (PF-Ph-PTAA). Two types of random copolymers were also synthesized with fluorene and phenoxazine (PF2) by Suzuki coupling polymerization for comparison. All the polymers were soluble in common organic solvents and readily formed thin films by a solution processing. Prepared polymers exhibited similar UV absorption and PL emission in chloroform solutions. In a film state, the existence of phenoxazine unit drastically changed PL spectra. Although the content of phenoxazine unit in PF-Ph-PTAA was relatively high (13 mol%), it showed similar PL spectrum to that of PF2(phenoxazine content, 0.2 mol%) indicating that phenoxazine unit is isolated in single polymer chain nevertheless the high content. EL device based on PF-Ph-PTAA showed green-emission, suggesting that emission sites predominantly located in the vicinity of phenoxazine moiety because of its shallow HOMO level.

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Section: Device Fabricationmentioning

confidence: 99%

Section: Device Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of Polyfluorene-Polytriarylamine Block Copolymer with Emitting Part at Junction Point for Light Emitting Applications

Jahanfar¹,

Suwa²,

Tsuchiya³

et al. 2013

OJOPM

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“…[2][3][4][5] Recently we have developed multifunctional block copolymers which affords EL devices with microphase separated active layers and higher efficiency. [6][7] In this work we synthesized the polytriphenylamine with the phenothiazine unit at terminal as a multifunctional polymer. Triphenylamine polymer chain with functionality of hole transporting and phenothiazine as a emitting part.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Polytriphenylamine with Emitting Part at Terminal for Light Emitting Application

Jahanfar¹,

Tsuchiya²,

Ogino³

2012

J. Photopol. Sci. Technol.

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Synthesis of a PPV‐fluorene derivative: Applications in luminescent devices

Rodrigues

Fontes

Torres

et al. 2015

J of Applied Polymer Sci

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Synthesis of a polyfluorene/poly(p-phenylene vinylene) derivative, the Poly [(9,9 0 -di-hexylfluorenediylvinylene-alt-1,4-phenylenevinylene)-co-((9,9 0 -(3-t-butylpropanoate) fluorene-1,4-phenylene)] (LaPPS 42) was performed following Wittig and Suzuki routes. Polyfluorenes and derivatives have been used in electroluminescent devices, and the synthesis described here has the advantage in pave the way to get distinct structures having different emission spectra. An extensive study of its electrochemical, thermomechanical, optical, and structural properties was carried out, as well as its application in electroluminescent devices. Polymer light-emitting diodes (PLEDs) and polymer light-emitting electrochemical cells (PLECs) were built using LaPPS 42 as active layer, and their electric and optical characterizations confirm they have a potential as active element in electroluminescent devices.

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Synthesis and luminescent properties of block copolymers based on polyfluorene and polytriphenylamine

Cited by 19 publications

References 32 publications

Synthesis of Polyfluorene-Polytriarylamine Block Copolymer with Emitting Part at Junction Point for Light Emitting Applications

Synthesis of Polyfluorene-Polytriarylamine Block Copolymer with Emitting Part at Junction Point for Light Emitting Applications

Synthesis of Polytriphenylamine with Emitting Part at Terminal for Light Emitting Application

Synthesis of a PPV‐fluorene derivative: Applications in luminescent devices

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