Polymerization of p-nitrophenylacetylene with metathesis catalysts. Photoelectrical properties of phenylacetylene/p-nitrophenylacetylene copolymer
| Autor: | Hynek Balcar, Jiří Vohlídal, Sandrine Cabioch, Olivier Lavastre, Vratislav Blechta, Martin Štícha, Jiří Pfleger, Jan Sedláček, Pierre H. Dixneuf |
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| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Chemistry Organic Chemistry Infrared spectroscopy Polymer Condensed Matter Physics Catalysis chemistry.chemical_compound Polymerization Phenylacetylene Acetylene Polymer chemistry Copolymer Materials Chemistry Physical and Theoretical Chemistry Benzene |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1521-3935 1022-1352 |
| DOI: | 10.1002/macp.1998.021990118 |
| Popis: | Preparation of substituted acetylene polymers carrying nitro group is reported for the first time. Homopolymers of p-nitrophenylacetylene (NPA) and its copolymer with phenylacetylene (PA) have been prepared by polymerizations induced by WOCl 4 /3Me 4 Sn as a catalyst in benzene and benzene/dioxane as solvents. WOCl 4 alone does not polymerize, oligomerize and/or cyclotrimerize NPA. The two-component catalysts WOCl 4 /2Ph4Sn and MoOCl 4 /3Me 4 Sn produce low amounts of oligomers only. The homopolymer of NPA is insoluble, whereas the copolymer containing one NPA unit per 4.38 units of PA is soluble in aromatic solvents and THF. The IR and NMR spectra of the homopolymer and the IR spectrum of the copolymer are reported. The photoconductive properties of the copolymer are also reported and compared with those of poly(PA). Introduction of NO 2 groups onto polymer chains was found to increase the quantum efficiency of charge carrier photogeneration but to deteriorate the charge carrier transport properties of the polymer. |
| Databáze: | OpenAIRE |
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