Optical Properties of PPV and PPP Polymers

Mulazzi, E.; Ripamonti, A.; Very, J.; Dulieu, B.; Faulques, Eric; Lefrant, S.

doi:10.1016/s0379-6779(98)01177-1

Cited by 8 publications

(27 citation statements)

References 3 publications

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“…For further validation, Raman spectroscopy was conducted. The spectra reveal three bands expected for PPP (1215, 1285, and 1602 cm –1 ; Figure B), consistent with the bands described for para -phenylene oligomers …”

supporting

confidence: 84%

A New Solution to an Old Problem: Synthesis of Unsubstituted Poly(para-phenylene)

Abdulkarim

Hinkel²,

Jänsch³

et al. 2016

J. Am. Chem. Soc.

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Unsubstituted and structurally well-defined poly(para-phenylene) (PPP) has been long-desired as an organic semiconductor prototype of conjugated polymers. To date, several attempts to synthesize unsubstituted, pristine, high-molecular-weight PPP have failed. Here we solved this synthetic problem by a versatile precursor route. Suzuki polymerization of kinked disubstituted 1,4-dimethoxycyclohexadienylene monomers yielded a well-soluble, nonaromatic precursor polymer. Its solubility allowed processing by spin-coating into nanometer-thick films. Subsequent additive-free thermal treatment induced aromatization and led to exclusively para-connected, highly fluorescent PPP with a length of about 75 phenylene units.

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supporting

confidence: 84%

A New Solution to an Old Problem: Synthesis of Unsubstituted Poly(para-phenylene)

Abdulkarim

Hinkel²,

Jänsch³

et al. 2016

J. Am. Chem. Soc.

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“…At room temperature, poly(para-phenylenevinylene) (PPV) and its oligomers exhibit a strong deviation from mirror image symmetry with the vibronic structure in the absorption spectrum being rather blurred and smeared out while the vibronic progression in the emission spectrum is relatively well-resolved. [17][18][19] At low temperature, however, the absorption spectrum gradually becomes more structured and mirror symmetry is recovered. 20,21 Poly(para-phenylene) (PPP) and its oligomers 22,23 as well as poly(fluorene) [24][25][26][27][28] exhibit a broad, completely featureless and unstructured absorption band while in emission a clearly resolved vibronic progression appears.…”

Section: Introductionmentioning

confidence: 99%

Breakdown of the mirror image symmetry in the optical absorption/emission spectra of oligo(para-phenylene)s

Heimel

Daghofer

Gierschner

et al. 2005

The Journal of Chemical Physics

128

158

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The absorption and emission spectra of most luminescent, pi-conjugated, organic molecules are the mirror image of each other. In some cases, however, this symmetry is severely broken. In the present work, the asymmetry between the absorption and fluorescence spectra in molecular systems consisting of para-linked phenyl rings is studied. The vibronic structure of the emission and absorption bands is calculated from ab initio quantum chemical methods and a subsequent, rigorous Franck-Condon treatment. Good agreement with experiment is achieved. A clear relation can be established between the strongly anharmonic double-well potential for the phenylene ring librations around the long molecular axis and the observed deviation from the mirror image symmetry. Consequences for related compounds and temperature dependent optical measurements are also discussed.

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“…A series of symmetric monomers (7)(8)(9)(10)(11) were prepared from hydroquinone derivatives synthesized by addition of alkyl bromides on ortho positions of benzenoid rings. UV-vis spectra of the symmetric monomers were taken with spectrophotometric grade chloroform (CHCl 3 ) and the spectra are given in Figure 2.…”

Section: Uv-vis Of Symmetric Ppv Monomersmentioning

confidence: 99%

“…5 Upon the discovery of the electroluminescent properties of this polymer, extensive studies followed where numerous derivatives were synthesized for various applications for organic electronics. [6][7][8][9] As an example, the literature describes the results of a tert-butylphenylene group on the optical, fluorescent, and thermal behavior of synthesized poly(p-phenylenevinylene) compounds. 10 Another study gives the preparation and characterization of an interesting soluble conducting polymer poly(2,5-di-n-butoxy-p-phenylene vinylene) and its application for light-emitting diodes.…”

Section: Introductionmentioning

confidence: 99%

Studies of optical, photophysical, and thermal properties of poly(paraphenylenevinylene) (PPV) polymers with symmetric alkoxy side‐chain lengths for potential application in electronic devices

Zengin

Ozer

Zengin

2023

Polymer Engineering & Sci

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Optical, photophysical, and thermal properties of poly(paraphenylenevinylene) (PPV) derivatives of various symmetric alkoxyl substituents were studied with UV–vis and photoluminescence spectroscopy. Molar absorptivity coefficients of the symmetric monomers increased compared to that of hydroquinone and its derivatives. The symmetric polymers exhibited photoluminescence quantum yields in the range of 32%–39% and excited‐state lifetimes of 3.01–3.61 ns. The emission energy values for the calculated band gaps were in the range of 2.16–2.12 eV for the symmetric polymers. The photoluminescent characteristics of these compounds may show great potential in improving the emitting layers of electronic devices. The thermal behavior and heat changes of the symmetric dialkyl PPV polymers were monitored by TGA and DSC. Glass transition temperatures (Tg) for these polymers were observed as being in range of 67–108°C. The heat values of the symmetric dialkyl PPV polymers were found to be in range 220.41–599.98 J/g, and the entropy values of symmetric dialkyl PPV polymers were determined to be in range 0.567–1.754 J/ g °C.Highlights• Symmetric poly(phenylene vinylene) (PPV) derivatives were prepared.• UV–vis spectroscopy was used for optical absorption studies.• Photophysical properties were examined by photoluminescence spectroscopy.• TGA was used for the thermal behavior of symmetric dialkyl PPV polymers.• Heat changes of symmetric dialkyl PPV polymers were investigated by DSC.

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Optical Properties of PPV and PPP Polymers

Cited by 8 publications

References 3 publications

A New Solution to an Old Problem: Synthesis of Unsubstituted Poly(para-phenylene)

A New Solution to an Old Problem: Synthesis of Unsubstituted Poly(para-phenylene)

Breakdown of the mirror image symmetry in the optical absorption/emission spectra of oligo(para-phenylene)s

Studies of optical, photophysical, and thermal properties of poly(paraphenylenevinylene) (PPV) polymers with symmetric alkoxy side‐chain lengths for potential application in electronic devices

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