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Journal ArticleDOI

Characterization and fluorescence properties of thiophene-modified π-conjugated nickel poly-yne polymers

01 May 1999-Polymer (Elsevier)-Vol. 40, Iss: 11, pp 3203-3209
TL;DR: In this paper, the authors characterized thiophene-2,5-diyl-modified nickel poly-yne polymers by gel permeation chromatography, infrared spectroscopy and X-ray photoelectron spectrography.
About: This article is published in Polymer.The article was published on 1999-05-01. It has received 4 citations till now. The article focuses on the topics: Thiophene & Gel permeation chromatography.
Citations
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Journal ArticleDOI
TL;DR: A comprehensive photophysical study has been carried out on a series of platinum-II-containing phenyl−ethynyl oligomers as mentioned in this paper, which are composed of a platinum center attached to two tributylpho...
Abstract: A comprehensive photophysical study has been carried out on a series of platinum(II)-containing phenyl−ethynyl oligomers. The compounds are composed of a platinum center attached to two tributylpho...

135 citations

Patent
27 Apr 2001
TL;DR: In this paper, the flatness of the luminous layer can be improved and the solubility of the luminescence layer constituent material can be enhanced by placing a polymer layer between a lower electrode and an upper electrode.
Abstract: An organic EL device employing polymer material includes a structure in which a luminous layer formed of a polymer indicated by is put between a lower electrode and an upper electrode. Where, in the above chemical formula, Ar1, Ar2 denote a allylene group respectively, R1, R2, R3, R4 denote a substituent respectively, and n denotes a copolymerization ratio. Accordingly, the flatness of the luminous layer can be improved and the solubility of the luminous layer constituent material can be enhanced.

7 citations

Journal ArticleDOI
Feng Li1, Jingyuan Wang1, Tengfeng Xie1, Dejun Wang1, Jun Tang1, Xinyi Tang1 
TL;DR: In this article, a polyorganophosphazene with pendant carbazolyl groups was synthesized, and its structure was characterized by IR, 1H-NMR, and 31P-NMRI spectroscopy.
Abstract: In this study, a new polyorganophosphazene with pendant carbazolyl groups was synthesized, and its structure was characterized by IR, 1H-NMR, and 31P-NMR spectroscopy. To understand its carrier photogeneration and transport property, we also studied fluorescence spectra and photovoltage spectra. Fluorescence spectra show that the polymer possesses properties dissimilar to those of PVK. There are only two emission peaks at ≈ 360 nm in its spectra, which coincides with that of the monomer model compound, 9-ethylcarbazole. This may be because of the influence of the spacer. The results of SPS shows that band–band transition mainly comes from electron π–π* transition, and the polymer is a p-type semiconductor. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1446–1451, 2001

5 citations

Journal ArticleDOI
TL;DR: In this paper, the aromatic-aliphatic copolyamides were synthesized by condensation polymerization of aromatic diamine PPD, where PPD is p-phenylene diamine and APS is aminophenyl sulfone.
Abstract: The aromatic-aliphatic copolyamides were synthesized by condensation polymerization of aromatic diamine PPD (or APS, where PPD is p-phenylene diamine and APS is aminophenyl sulfone), aliphatic diamine HDA (or EDA, where HDA is hexanediamine and EDA is ethylenediamine), and TPC (where TPC is terephthalyl chloride) with different molar ratios of aromatic diamine to aliphatic diamine. The steady-state fluorescence of these condensed copolymers was investigated. These copolyamides exhibit strong blue-to-green fluorescence. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 315–321, 2005

1 citations

References
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Journal ArticleDOI
11 Oct 1990-Nature
TL;DR: In this article, the authors demonstrate that poly(p-phenylene vinylene), prepared by way of a solution-processable precursor, can be used as the active element in a large-area light-emitting diode.
Abstract: CONJUGATED polymers are organic semiconductors, the semiconducting behaviour being associated with the π molecular orbitals delocalized along the polymer chain. Their main advantage over non-polymeric organic semiconductors is the possibility of processing the polymer to form useful and robust structures. The response of the system to electronic excitation is nonlinear—the injection of an electron and a hole on the conjugated chain can lead to a self-localized excited state which can then decay radiatively, suggesting the possibility of using these materials in electroluminescent devices. We demonstrate here that poly(p-phenylene vinylene), prepared by way of a solution-processable precursor, can be used as the active element in a large-area light-emitting diode. The combination of good structural properties of this polymer, its ease of fabrication, and light emission in the green–yellow part of the spectrum with reasonably high efficiency, suggest that the polymer can be used for the development of large-area light-emitting displays.

10,463 citations

Book
01 Jan 1966
TL;DR: Common physical techniques used in purification chemical methods used in Purification purification of organic chemicals Purification of inorganic and metal organic chemicals general methods for the purification classification of classes of compounds and natural products biochemicals and related products as mentioned in this paper.
Abstract: Common physical techniques used in purification chemical methods used in purification purification of organic chemicals purification of inorganic and metal organic chemicals general methods for the purification of classes of compounds purification of natural products biochemicals and related products.

10,132 citations

Book
01 Jan 1962
TL;DR: In this article, the authors present a survey of research work in physics, physical sciences, and physical chemistry, focusing on physics, chemistry, physics, and biology. But they do not discuss their work in this paper.
Abstract: This book should be of interest to senior undergraduates, postgraduates and research workers in physics, physical sciences, physical chemistry.

8,754 citations

BookDOI
01 Jan 1980

5,331 citations

Journal ArticleDOI
14 Oct 1993-Nature
TL;DR: In this article, a new family of processible poly(cyanoterephthalylidene)s was used for electron injection and hole injection in poly(p-phenylene vinylene) (PPV) diodes.
Abstract: CONJUGATED polymers have been incorporated as active materials into several kinds of electronic device, such as diodes, transistors1 and light-emitting diodes2. The first polymer light-emitting diodes were based on poly(p-phenylene vinylene) (PPV), which is robust and has a readily processible precursor polymer. Electroluminescence in this material is achieved by injection of electrons into the conduction band and holes into the valence band, which capture one another with emission of visible radiation. Efficient injection of electrons has previously required the use of metal electrodes with low work functions, primarily calcium; but this reactive metal presents problems for device stability. Here we report the fabrication of electroluminescent devices using a new family of processible poly(cyanoterephthalylidene)s. As the lowest unoccupied orbitals of these polymers (from which the conduction band is formed) lie at lower energies than those of PPV, electrodes made from stable metals such as aluminium can be used for electron injection. For hole injection, we use indium tin oxide coated with a PPV layer; this helps to localize charge at the interface between the PPV and the new polymer, increasing the efficiency of recombination. In this way, we are able to achieve high internal efficiencies (photons emitted per electrons injected) of up to 4% in these devices.

1,593 citations