The Synthesis and Property of Dihydropyrene Derivatives Containing a Nitrogen Atom
書誌事項
- 公開日
- 2007-08-10
- DOI
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- 10.1080/15421400701503667
- 公開者
- Informa UK Limited
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説明
Dihydropyrene (DHP) is 14π aromatic compound and applied as an aromatic probe by chemical shift of internal methyl groups in 1H-NMR spectra. DHP containing a nitrogen atom 1a and 2a were designed as photochromic compounds which were restrained thermal-isomerization. 1a and 2a were confirmed as DHP types by 1H-NMR spectra. Chemical shifts of internal methyl groups of 1a and 2a were observed at the lower magnetic field than that of DHP 3a . According to optimized structures of 1a and 3a , it was expected that the internal methyl group located of the out at center of 14π annulene ring. Isomerization to [2.2]metacyclophanediene 1b from DHP 1a by photo-irradiation of visible light was not observed.
収録刊行物
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- Molecular Crystals and Liquid Crystals
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Molecular Crystals and Liquid Crystals 470 369-381, 2007-08-10
Informa UK Limited