173166-64-8Relevant academic research and scientific papers
Naphthalene amidine imide dyes by transamination of naphthalene bisimides
Langhals, Heinz,Jaschke, Harald
, p. 2815 - 2824 (2008/02/03)
Derivatives of naphthalene-1,4,5,8-tetracarboxylic acid with amidine structures have been prepared. The light absorption of the bisimide derivatives in the UV region is shifted to the visible for the amidine imides, which also fluoresce with a large Stoke
Difference in guest-inclusion abilities of anti- and syn-rotamers
Kishikawa, Keiki,Iwashima, Chiaki,Kohmoto, Shigeo,Yamaguchi, Kentaro,Yamamoto, Makoto
, p. 2217 - 2221 (2007/10/03)
Guest inclusion abilities of two rotamers, anti- and syn-N,N′-bis-(2-tert-butylphenyl)naphthalene-1,4,5,8-tetra-carboxylic diimides 1 and 2, were investigated. Rotamers 1 and 2 were synthesised from 2-tert-butylaniline and naphthalene-1,4,5,8-tetracarboxylic dianhydride and separated by conventional column chromatography on silica gel. Recrystallisation of 1 from chloroform in the presence of a guest molecule (3 mole equivalents) was performed, and 15 guest molecules were included with a variety of host:guest ratios, 1:1 (chloroform, pyridine, 4-picoline, benzene, quinoline, diphenylacetylene, naphthalene, and p-toluidine), 1:2 (phenol, 3-ethylphenol, 4-methoxyphenol, indole, 5-methylindole, and tetrathiafulvalene), and 1:4 (benzothiazole). In contrast, 2 showed no inclusion of guest molecules under the same conditions as those applied to 1. In order to investigate the intermolecular interaction in the crystalline state of 1, 2 and 1·(indole)2, X-ray diffraction of single crystals was measured and these structures were compared.
