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Branched charge-transfer chromophores featuring 4,5-dicyanoimidazole.
Year: 2009
Type of publication: ostatní - přednáška nebo poster
Name of source: 13th International Symposium on Novel Aromatic Compounds
Publisher name: LD Organisation
Place: Cambridge
Page from-to: nestránkováno
Titles:
Language Name Abstract Keywords
cze Branched charge-transfer chromophores featuring 4,5-dicyanoimidazole. Diverse organic push-pull molecules with large delocalized p-electron system end caped with the electron donors (D) and acceptors (A) comprising either symmetrical A-p-A, D-p-D or asymmetrical A-p-D chromophore types currently attract considerable attention of organic as well as material chemists. The readily polarizable push-pull systems became tremendously investigated for their promising optoelectronic properties and wide application in modern material chemistry. It has been also realized that for successful fabrication of such chromophores, a good chemical and thermal robustness is required (nonlinearity-transparency-solubility-thermal stability trade off). Hence, various heteroaromates became widely utilized as robust p-backbones in such push pull molecules while five membered diazoles, e.g. imidazoles, have also been applied as suitable heteroaromatic systems for the construction of charge-transfer chromophores. Since the first synthesis of 4,5-dicyanoimidazole in 1950, this planar heterocyclic heterocyclic compound has been evolved in easily accessible, soluble and robust precursor which may act as an efficient acceptor moiety. We report herein synthesis and properties of imidazole based push-pull systems possessing the 4,5-dicyanoimidazole as an acceptor moiety and N,N dimethylamino group as a donor with the systematically extended p-conjugated path in between. imidazole, charge-transfer, NLO
eng Branched charge-transfer chromophores featuring 4,5-dicyanoimidazole. Diverse organic push-pull molecules with large delocalized p-electron system end caped with the electron donors (D) and acceptors (A) comprising either symmetrical A-p-A, D-p-D or asymmetrical A-p-D chromophore types currently attract considerable attention of organic as well as material chemists. The readily polarizable push-pull systems became tremendously investigated for their promising optoelectronic properties and wide application in modern material chemistry. It has been also realized that for successful fabrication of such chromophores, a good chemical and thermal robustness is required (nonlinearity-transparency-solubility-thermal stability trade off). Hence, various heteroaromates became widely utilized as robust p-backbones in such push pull molecules while five membered diazoles, e.g. imidazoles, have also been applied as suitable heteroaromatic systems for the construction of charge-transfer chromophores. Since the first synthesis of 4,5-dicyanoimidazole in 1950, this planar heterocyclic heterocyclic compound has been evolved in easily accessible, soluble and robust precursor which may act as an efficient acceptor moiety. We report herein synthesis and properties of imidazole based push-pull systems possessing the 4,5-dicyanoimidazole as an acceptor moiety and N,N dimethylamino group as a donor with the systematically extended p-conjugated path in between. imidazole, charge-transfer, NLO

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