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- W2034676812 abstract "Biscyanines linked by a 1,8-naphthylene skeleton (1), suitable model compounds for a study on polymethine dye aggregates, were prepared. Biscyanines, 1b and 1c, having methoxy and chloro substituents on the benzothiazole nuclei, respectively, were identified to be in syn conformation based upon X-ray crystallographic analysis and NMR spectroscopy. Their absorption maxima were found to be hypsochromically shifted compared to those of the 1-naphthyl substituted monocyanines (2). Only a biscyanine 1e having negatively charged sulfonato groups on the benzothiazole nuclei showed a bathochromic shift and was found to exist as an anti conformer. These spectral shifts were reproduced by the calculations with the INDO/S-CI method and are in agreement with those based upon the molecular exciton theory. The positive shifts of the reduction potentials of 1 compared to those of 2 are explained by the Coulombic and orbital interactions between the two cyanine moieties." @default.
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- W2034676812 date "1997-09-01" @default.
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- W2034676812 title "Biscyanines Linked by a 1,8-Naphthylene Skeleton: Models of Polymethine Dye Aggregates" @default.
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- W2034676812 doi "https://doi.org/10.1246/bcsj.70.2287" @default.
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