9,9′-Spirobifluorene is a polyfluorene with carbon atoms of the methylene bridge connected to two fluorene molecules. It is mainly used in organic electronics due to its robust structure and two perpendicularly arranged π systems.9,9′-Spirobifluorene can be used in the synthesis of spirobifluorene based conjμgated microporous polymers which can be potentially be used as a gas absorbent.It may be used as a hole transporting material which can be used in the fabrication of perovskite solar cells. 9,9′-Spirobifluorene is a polyfluorene with carbon atoms of the methylene bridge connected to two fluorene molecules. It is mainly used in organic electronics due to its robust structure and two perpendicularly arranged π systems.