Encapsulated Conducting Polymers

Cardin, D. J.

doi:10.1002/1521-4095(20020418)14:8<553::aid-adma553>3.0.co;2-f

Cited by 201 publications

(96 citation statements)

References 46 publications

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“…Furthermore, the encapsulation effectively isolates adjacent polymer chains and may improve their thermal and chemical stabilities. [3] Recently, Kim and coworkers demonstrated that by incorporating a blue-light-emitting polymer into the interlayer space of layered silicates, the color purity and stability are enhanced. [4] The blue-emission stability of the nanocomposites was attributed to the reduced polymer-polymer interchain interactions and inhibited oxygen percolation, achieved by isolating some of the conjugated polymer chains within the layered structure.…”

Section: Introductionmentioning

confidence: 99%

Stable Blue Emission from a Polyfluorene/Layered‐Compound Guest/Host Nanocomposite

Aharon

Albo

Kalina

et al. 2006

Adv Funct Materials

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In this study a blue‐light‐emitting conjugated polymer, poly(9,9‐dioctylfluorene), is confined to the interlayer space of inorganic, layered metal dichalcogenide materials, metallic MoS2, and semiconducting SnS2. The nanocomposites are prepared through Li intercalation into the inorganic compound, exfoliation, and restacking in the presence of the polymer. X‐ray diffraction and optical absorption measurements indicate that a single conjugated polymer monolayer, with an overall extended planar morphology conformation, is isolated between the inorganic sheets, so that polymer aggregation or π–π interchain interactions are significantly reduced. Photoluminescence (PL) measurements show that the appearance of the undesirable green emission observed in pristine polymer films is suppressed by incorporating the polymer into the inorganic matrix. The blue emission of the intercalated polymer is stable for extended periods of time, over two years, under ambient conditions. Furthermore, the green emission is absent in the PL spectra of nanocomposite films heated at 100 °C for 7 h in air with direct excitation of the keto defect. Finally, no green emission was observed in the electroluminescence spectrum of light‐emitting devices fabricated with a polymer‐intercalated SnS2 nanocomposite film. These results support the proposed hypothesis that fluorenone defects alone are insufficient to generate the green emission and that interchain interactions are also required.

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Section: Introductionmentioning

confidence: 99%

Stable Blue Emission from a Polyfluorene/Layered‐Compound Guest/Host Nanocomposite

Aharon

Albo

Kalina

et al. 2006

Adv Funct Materials

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“…One of the most important classes of composites is the materials obtained by the incorporation of various kinds of polymers of controlled physico-chemical properties into porous inorganic material. The insertion of the polymers into the inorganic host cavities can be obtained carrying out the polymerization process inside the cavities themselves (Cardin, 2002). If the initiator is covalently bound to inner surface of the host the polymer can be synthesized directly inside the host pores (Spange et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Noncrystalline L-Phenylalanine-Silica Hybrid Composite Materials for High Selective Reversed Phase Liquid Chromatography

Rahman¹,

Takafuji²,

Ihara³

2011

Metal, Ceramic and Polymeric Composites for Various Uses

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“…[9] Recently, a few researchers have turned their attention to the encapsulation of active small molecular EL materials for application as EL devices. In practice, capsules prepared using several dendrimers or hyperbranched polymers gave an EL device with excellent stability, [10,11] though the procedures of encapsulation required were very complicated.…”

Section: Introductionmentioning

confidence: 99%

Novel Light Emitting Diode Using Organic Electroluminescence Microcapsules

Heo¹,

Park²,

Ryu³

et al. 2003

Macro Chemistry & Physics

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Novel light emitting diodes (LEDs) were prepared using electroluminescence (EL) material/polymer microcapsules (ELC). N‐vinylcarbazole as a hole‐transporting component and methyl methacrylate (MMA) were copolymerized for producing the seed particles using dispersion polymerization. An oxadiazole derivative, synthesized as a electron‐transporting component, and tris(8‐hydroxyquinolinato) aluminium(III) (Alq3) were incorporated into the polymer particles by using the solute co‐diffusion method (SCM). The LEDs for the EL characterization were fabricated in a thin sandwich configuration: Al anode/ELC/ITO cathode. The surface imaging of the LED prepared using ELC was performed by atomic force microscopy (AFM). The EL characteristics of the ELC were investigated by UV, photoelectron and luminescence spectroscopy, and the current‐voltage and the light‐voltage characteristics for the LED were determined.

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Encapsulated Conducting Polymers

Cited by 201 publications

References 46 publications

Stable Blue Emission from a Polyfluorene/Layered‐Compound Guest/Host Nanocomposite

Stable Blue Emission from a Polyfluorene/Layered‐Compound Guest/Host Nanocomposite

Noncrystalline L-Phenylalanine-Silica Hybrid Composite Materials for High Selective Reversed Phase Liquid Chromatography

Novel Light Emitting Diode Using Organic Electroluminescence Microcapsules

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