New Biphenyl Derivative with Planar Phenyl−Phenyl Conformation in Crystal at Room Temperature Exhibits Highly Efficient UV Light-Emitting

The novel biphenyl derivative 1, which has planar conformation in crystal at room temperature, is synthesized
and investigated by X-ray diffraction. A hydrogen-bonding network, which may be the driving force for the
formation of planar conformation, is observed in the crystal of 1. 1 exhibits a strong UV-fluorescent emission
in the solid state at room temperature.