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Photo-induced charge transfer

Reaction Mechanism of Vinyl Polymerization with Amine in Redox and Photo-Induced Charge-Transfer Initiation Systems... [Pg.227]

A substantial number of photo-induced charge transfer polymerizations have been known to proceed through N-vinylcarbazole (VCZ) as an electron-donor monomer, but much less attention was paid to the polymerization of acrylic monomer as an electron receptor in the presence of amine as donor. The photo-induced charge-transfer polymerization of electron-attracting monomers, such as methyl acrylate(MA) and acrylonitrile (AN), have been recently studied [4]. In this paper, some results of our research on the reaction mechanism of vinyl polymerization with amine in redox and photo-induced charge transfer initiation systems are reviewed. [Pg.227]

III. PHOTO-INDUCED CHARGE TRANSFER POLYMERIZATION OF VINYL MONOMERS... [Pg.236]

Graft Copolymerization of Vinyl Monomers Onto Macromolecules Having Active Pendant Group via Ceric Ion Redox or Photo-Induced Charge-Transfer Initiation... [Pg.541]

MACROMOLECULES HAVING AN ACTIVE PENDANT GROUP BY PHOTO-INDUCED CHARGE-TRANSFER INITIATION... [Pg.551]

Therefore, the graft copolymerization of vinyl monomers onto macromolecules having active an pendant group can be achieved either by redox initiation with a Ce(IV) ion or by photo-induced charge-transfer initiation with BP, depending on the structure of the active groups. [Pg.552]

MEH-PPV and P3MBET, were used. As a measure of the efficiency of the photo-induced charge transfer, the degree of luminescence quenching and the ratio of the charged photoexcitation bands to the neutral photoexcitation bands were taken. These two numbers are plotted in Figure 15-15 versus the electrochemical reduction potential. A maximum in the photoinduced electron transfer was determined for Cbo. [Pg.593]

Valeur B. and Leray I. (2001) PCT (Photo-induced Charge Transfer) Fluorescent Molecular Sensors for Cation Recognition, in Valeur B. and Brochon J. C. (Eds),... [Pg.350]

The photo-induced charge-transfer copolymerization entity consists of a donor monomer and an acceptor monomer, without initiator. Reported combinations usually consist of an aryl vinyl monomer as the donor component and a 1,2-disubstituted vinyl monomer as the acceptor component. [Pg.7]

Generally, the photo-induced charge-transfer copolymerization follows a radical mechanism and produces alternating copolymers. Accompanying cyclobutane formation is usually observed, which provides information for understanding the mechanism. [Pg.9]

A charge-transfer complex (CT complex or CTQ is involved in all thermal charge-transfer polymerizations and in most of the photo-induced charge-transfer copolymerizations. Mixing of a donor (D), such as VCZ, with an acceptor, such as tetracyanoethylene (TCNE), immediately produces color [31] due to the formation of a CT complex ... [Pg.10]

The initiation mechanism of photo-induced charge-transfer copolymerization of donor-acceptor monomer pairs is clarified by integrating the results from organic chemistry and polymer chemistry. A reasonable suggestion for the initiating species in certain cases may be a tetramethylene 1,4-diradical. The excited complex of the donor/acceptor monomers undergoes multiple follow-up reactions to produce the... [Pg.35]

The Role of Tetramethylene Diradicals in Photo-Induced Charge-Transfer Cycloadditions and Copolymerization... [Pg.166]

Kanemitsu et al. (1989) observed decreased charge acceptance after prolonged irradiation of polymers doped with the hole transport molecule 2-(p-dipropylaminophenyl) -4- (p-dimethylaminophenyl) -5- (o-chlorophenyl) -1,3-oxazole. The effects depended on the polymer. A mechanism involving photo-induced charge transfer was proposed. Stolle et al. (1987) made a similar observation in studies of polymer photoconductors such as poly(N-vinyl-... [Pg.642]

Photo-Induced Charge-Transfer Processes on the Catalyst Surface... [Pg.7]

We would like to express our thanks to V. A Apkarian for his detailed communication of recent experimental results on synergistic effects in photo-induced charge transfer. [Pg.99]

Solvatochromic effects relate closely in their nature to those found in photo-induced charge transfer. The influence of... [Pg.17]

Redox-active substances can be bound to nanotubes this way, too. The first photo-induced charge transfer from a nanotube to a ferrocene has been observed on a tube connected with the ferrocene in this manner (Figure 3.74). The longevity of the charge-separated state renders the material interesting for electronic... [Pg.233]

See other pages where Photo-induced charge transfer is mentioned: [Pg.541]    [Pg.551]    [Pg.432]    [Pg.69]    [Pg.134]    [Pg.83]    [Pg.423]    [Pg.11]    [Pg.154]    [Pg.108]    [Pg.3781]    [Pg.136]    [Pg.165]    [Pg.166]    [Pg.167]    [Pg.147]    [Pg.283]    [Pg.98]    [Pg.3780]    [Pg.274]    [Pg.6]    [Pg.11]    [Pg.11]    [Pg.9]    [Pg.14]   
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See also in sourсe #XX -- [ Pg.192 ]

See also in sourсe #XX -- [ Pg.165 ]

See also in sourсe #XX -- [ Pg.11 ]

See also in sourсe #XX -- [ Pg.14 , Pg.15 ]

See also in sourсe #XX -- [ Pg.14 , Pg.15 ]

See also in sourсe #XX -- [ Pg.120 ]



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