The fluorene compound has a special rigid planar biphenyl structure, which makes it has high chemical stability, thermal stability and luminescence quantum efficiency, can be applied to organic two-photon absorption materials and other fields. Secondly, fluorene derivatives have more obvious electroluminescence and photoluminescence than other compounds, and are widely used in the field of optoelectronic materials, and the conjugated absorption wavelength of fluorene ring molecules is larger than other compounds.
