2,7-Bis(9,9-spirobifluoren-2-yl)-9,9-spirobifluorene (TSBF) has three spirobifluorene joined at 2,7-positions. Exhibiting high glass transition temperatures (Tg?= 231?°C), excellent thermal and color stabilities, spirobifluorene derivatives, such as Spiro-OMeTAD, are?well sought for in OLED devices.
