Förster energy transfer and control of the luminescence in blends of an orange­emitting poly(p­phenylenevinylene) and a red­emitting tetraphenylporphyrin

Morgado, Jorge; Cacialli, Franco; Iqbal, R.; Moratti, Stephen C.; Holmes, Andrew B.; Yahioglu, Gökhan; Milgrom, Lionel R.; Friend, Richard H.

doi:10.1039/b005478j

Cited by 56 publications

(38 citation statements)

References 25 publications

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“…Morgado and co-workers have reported a Förster-type energy transfer to a porphyrin chromophore after it was blended with a poly[1,4-phenylenevinylene] derivative. [59] A mechanistic study of excitation energy transfer has been reported by Brunner and co-workers using a similar dye-doped phenylenevinylene system. [60] They found that efficient transfer of excitation energy from a disordered polymer to a dye can only occur if the polymer-to-dye exciton transfer rate is higher than the intrapolymer exciton migration rate at a given energy.…”

Section: Gel Matrices and Energy Transfermentioning

confidence: 93%

Improving the Properties of Organic Dyes by Molecular Encapsulation

2005

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There is a demand for new methods of protecting organic dyes from aggregation effects and photochemical degradation. The purpose of this microreview is to summarize the recent attempts to improve the properties of dyes by molecular encapsulation. Organic dyes have been encapsulated inside inorganic matrices such as molecular sieves, and molecular containers such as cyclodextrins, cucurbiturils, dendrimers, and self-assembled gels. Another strategy is perma- IntroductionOrganic chromophores such as cyanines, squaraines, azo dyes and perylenediimide dyes are widely used as pigments in many commercial products. They are active ingredients in semiconducting materials, [1] textile products, [2] laser materials, [3] optical disks, [4] paints, [5] and probes for biological systems.[6] Modern research on organic dyes includes investigations of building blocks for conjugated polymers, hydrogen bonded assemblies, chromogenic sensors, molecular shuttles, solar energy cells, photonics and various approaches to photodynamic therapy. [7][8][9][10][11] A common limitation with organic dyes, especially those with long-wavelength absorption bands, is their susceptibility to chemical and photochemical degradation. The reason for the enhanced reactivity is the inherently small HOMO-LUMO energy gap, which means that the dyes are potentially reactive with both nucleophiles and electrophiles. Another potential drawback with organic dyes is their tendency to aggregate, which induces multichromophoric interactions that alter the color quality and quench the photoluminescence. In principle, these problems can be attenuated by supramolecular encapsulation strategies that isolate the individual dye molecules and prevent self-aggregation or similar interactions with the chemical environment. The purpose of this microreview is to summarize the recent literature on meth- Germany, 2005) ods to improve the properties of organic dyes by molecular encapsulation. The focus is on relatively "robust" molecular containers and does not include "soft" assemblies like micelles, emulsions or vesicles.

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Section: Gel Matrices and Energy Transfermentioning

confidence: 93%

Improving the Properties of Organic Dyes by Molecular Encapsulation

2005

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“…The calculated R 0 value is quite small, if compared to that in the MEH-PPV/porphyrin system (R 0 = 25 Å) [24], which is relatively small among the values in the Förster type of organic films reported thus far. Smaller R 0 indicates that the average host-guest distance must become closer by increasing guest concentration to achieve complete energy transfer (i.e., complete quenching of the host emission).…”

Section: Resultsmentioning

confidence: 93%

Photoluminescent mechanism of a proton-transfer laser dye in highly doped polymer films

Sakai¹,

Ichikawa²,

Taniguchi³

2006

Chemical Physics Letters

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Photoluminescent properties in thin films of the proton-transfer (PT) laser dye, 2-(2-hydroxyphenyl)benzothiazole (HBT) were investigated, when it was doped into hole-transport polymer, poly(N-vinylcarbazole) and when it was codoped with hole-transport small molecule, N,The more the doping concentration of HBT was raised up to about 40 wt%, the more its photoluminescent intensity was enhanced without showing excimer or exciplex emissions. The mechanism for such phenomena was discussed in connection with the excited-state intramolecular proton-transfer reaction of HBT.

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“…The threshold voltage is increased slightly and the reduction of the current density as the doping level indicating the decreasing of the charge mobility of excitons due to the addition of TTP. The result is the same as the literatures [18,19]. The EL emission spectra for devices studied at the applied voltage of 16 V are shown in Fig.…”

Section: El Properties Of the Films And Fabrication Of Multicolor Devmentioning

confidence: 84%

“…Such energy transfer was observed for instance when TPP blended with blue-emitting polymers, such as poly (9,9-dioctylfluorene) [17], because of the large spectral overlap of the polymer's emission with the absorption of "Soret" band of TPP, which, generally, causes efficient energy transfer. However, relatively efficient energy transfer was found as well at the small absorption of Q-bands of 5,10,15-tris (4-tertbutyl-phenyl)-20-(4-hydroxyphenyl)porphine, a tetraphenylporphyrin derivative, in the spectral range of poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) emission [18].…”

Section: Introductionmentioning

confidence: 99%

Photo- and electro-luminescent properties of 5,10,15,20-tetra-p-tolyl-21H,23H-porphine doped poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] films

Zhong

Wang

et al. 2009

Thin Solid Films

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Förster energy transfer and control of the luminescence in blends of an orangeemitting poly(pphenylenevinylene) and a redemitting tetraphenylporphyrin

Cited by 56 publications

References 25 publications

Improving the Properties of Organic Dyes by Molecular Encapsulation

Improving the Properties of Organic Dyes by Molecular Encapsulation

Photoluminescent mechanism of a proton-transfer laser dye in highly doped polymer films

Photo- and electro-luminescent properties of 5,10,15,20-tetra-p-tolyl-21H,23H-porphine doped poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] films

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Förster energy transfer and control of the luminescence in blends of an orange­emitting poly(p­phenylenevinylene) and a red­emitting tetraphenylporphyrin

Cited by 56 publications

References 25 publications

Improving the Properties of Organic Dyes by Molecular Encapsulation

Improving the Properties of Organic Dyes by Molecular Encapsulation

Photoluminescent mechanism of a proton-transfer laser dye in highly doped polymer films

Photo- and electro-luminescent properties of 5,10,15,20-tetra-p-tolyl-21H,23H-porphine doped poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] films

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Förster energy transfer and control of the luminescence in blends of an orangeemitting poly(pphenylenevinylene) and a redemitting tetraphenylporphyrin