K. Yoshida et al., SYNTHESIS OF NEW IMIDAZOANTHRAQUINOL FLUOROPHORES AND THEIR FLUORESCENCE AND SOLID-STATE INCLUSION PROPERTIES, Chemistry Letters, (1), 1996, pp. 9-10
Isomeric pairs of new imidazoanthraquinol-type fluorophores have been
synthesized by reaction of a imidazoanthraquinone dye with organometal
lic reagents. One of a pair was found to exhibit an intense fluorescen
ce in solutions and to form clathrate crystals that contained various
kinds of solvent molecules as guest species.