9,9-bis(4-hydroxyphenyl)-2,7-diiodo-9H-fluorene
2,7-bis(phenylethynyl)-9H-fluoren-9-one
2,7-bis((4-(butyl(2-ethylhexyl)amino)phenyl)ethynyl)-9H-fluoren-9-one
2,7-bis((4-(dibutylamino)phenyl)ethynyl)-9H-fluoren-9-one
2,7-bis[(4-methoxyphenyl)ethynyl]-9H-fluoren-9-one