Alkylated dinaphtho[2,3-b:2',3'-d]furan (DNF–V) derivatives are systematically investigated in view of the impact of the substitution position as well as length of alkyl side chains. For both alkylated DNF–VV and DNF–VW derivatives, the solubilities as well as phase-transition temperatures increase as the shorter alkyl chains are attached. Especially, alkylated DNF–VV simultaneously gain the high solubility over 1 wt% and highly stabilized crystal phase up to 199 °C. Furthermore, DNF–V derivatives exhibit deep-blue emission in solid state with the quantum efficiency ranging from 17 to 51%.
- Chikahiko Mitsui
- Tatsuro Annaka
- Toshihiro Okamoto
