Conductivity and spectroscopic characterization of polyacetylene doped with ferric chloride

Chen, Zhongxin; Shen, Zhiquan; Chen, Changshen; Zhao, Yonggang; Yang, Mujie

doi:10.1002/macp.1987.021880212

Cited by 9 publications

(1 citation statement)

References 10 publications

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“…According to the "area method", the concentration of iron in the viaduct aerosol and in the park aerosol (TSP) is 27 (6) µg/m 3 and 18(4) µg/m 3 , respectively. Comparing these Mo ¨ssbauer parameters with those reported in some references, we can assume that the elemental iron in these aerosols is in the high-spin Fe 3+ state in a chloride tetrahedron (17)(18)(19) or in sulfate (20) or R-FeOOH (21). To study further about the state of iron compounds in aerosol, we also analyzed the concentration and distribution of elements in the individual particles of aerosols by SPM.…”

Section: Resultsmentioning

confidence: 78%

Mössbauer Study of Atmospheric Aerosols of Shanghai

Tong

Cai

et al. 2001

Environ. Sci. Technol.

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Three iron-containing atmospheric aerosol samples were collected, one at a tunnel, one near a viaduct, and one at a park in Shanghai City. These samples were studied by Mössbauer spectroscopy. The experimental results show that ultrafine particles alpha-Fe2O3 (about 13 nm) are the main component of the iron-containing atmospheric aerosols in the tunnel, and high-spin Fe3+ in sulfate containing a small amount of alpha-FeOOH is the main component of iron-containing particles in the aerosols from the other two places. The concentrations of iron in these locations, compared with those of some foreign cities, are much higher. To explore the chemical compositions of iron compounds in aerosols, SPM (scanning proton microprobe) has also been used. From these results, a possible chemical process by which the iron oxides converted to iron sulfate in air was discussed.

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Section: Resultsmentioning

confidence: 78%

Mössbauer Study of Atmospheric Aerosols of Shanghai

Tong

Cai

et al. 2001

Environ. Sci. Technol.

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Polymerization of acetylenes with rare earth coordination catalysts

Shen

1994

Macromolecular Symposia

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The polymerization of acetylene and its derivatives by rare earth coordination catalysts and the characterization of the polymers so obtained in our laboratory are reviewed. Because of the metallic conductivity possessed by doped polyacetylene and the unique properties such as conductivity (semiconductivity), paramagnetism, migration and transfer of energy and chemical reactivity and complex formation ability often shown by acetylenic polymers, which seem promising as specialty polymers, there has been considerable interest in the polymers of acetylene and its derivatives. A wide variety of catalyst systems have been developed for the polymerization of acetylenes. But there has been no information concerning the use of rare earth compounds as catalysts in the polymerization of acetylene and its derivatives. We for the first time in 1981 have succeeded in the polymerization of acetylene with rare earth coordination catalysts, which in turn is a development based upon earlier work on the diene polymerization using rare earth coordination catalysts(Ref. 1). Using rare earth catalysts, acetylene can be polymerized conveniently into high cis polyacetylene films with metallic sheen at room temperature and phenylacetylene can also be polymerized into high molecular weight, high cis polyphenylacetylene films at ambient temperature. Thus new varieties of polyacetylenes have been developed and a novel family of coordination catalysts consisting of a rare earth compound plus trialkyl aluminum for the polymerization of acetylenes has been exploited. This article reviews our studies on the polymerization of acetylene and its derivatives with rare earth coordination catalysts and on the characterization of the polyacetylenes prepared.

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Synthesis and evaluation of metal-containing polymers

Biswas

Mukherjee

Photoconducting Polymers/Metal-Containing Polymers

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Conductivity and spectroscopic characterization of polyacetylene doped with ferric chloride

Cited by 9 publications

References 10 publications

Mössbauer Study of Atmospheric Aerosols of Shanghai

Mössbauer Study of Atmospheric Aerosols of Shanghai

Polymerization of acetylenes with rare earth coordination catalysts

Synthesis and evaluation of metal-containing polymers

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