from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A polycyclic aromatic hydrocarbon consisting of two benzene rings joined together directly, and also via a methylene bridge; it is used in light-emitting diodes.
from the GNU version of the Collaborative International Dictionary of English
- n. A colorless, crystalline hydrocarbon, C13H10 having a beautiful violet fluorescence; whence its name. It occurs in the higher boiling products of coal tar, and is obtained artificially.
from The Century Dictionary and Cyclopedia
- n. A solid hydrocarbon, C13 H10, contained in portions of coal-tar boiling at 300–400° C. If not quite pure it has a violet fluorescence. Also called orthodiphenylenemethane or 2,2′ -melhylenebiphenyl. It melts at 113° C.
M.P. 273°-276° C., and yields fluorene on distillation with zinc dust.
C. Distillation with zinc dust yields fluorene (see above) --
The latter reaction especially illustrates the analogous formation of fluorene from compounds of the type --
On the nature of the fluorenone-based emission in oxidized poly (dialkyl-fluorene) s
Gibson, D.T.: Regio - and stereospecific oxidation of fluorene, dibenzofuran, and dibenzothiophene by naphthalene dioxygenase from Pseudomonas sp. strain NCIB 9816-4.
(84-87% (1R,2S) - cis-1,2-dihydroxy-dihydrodiben - zothiophene, enantiomeric excess greater than 95%, 15% dibenzothio - phene sulfoxide )  S fluorene + NADH + O2