Bipyridyl aggregation-induced emission compound with multiple stimulation responses as well as preparation method and application of bipyridyl aggregation-induced emission compound

The invention discloses a bipyridyl aggregation-induced emission compound with multiple stimulation responses as well as a preparation method and application of the bipyridyl aggregation-induced emission compound, and the bipyridyl aggregation-induced emission compound is generated by utilizing 2-(4-pyridine-4-yl phenyl) acetonitrile and 4, 4 '-bis (diphenyl amino)-[1, 1': 4 ', 1'-terphenyl]-2 ', 5'-dicarboxaldehyde through Knoevenagel condensation reaction. The compound shows different emission wavelengths in solvents with different polarities, and the emission wavelengths have obvious red shift along with the increase of the polarity of the solvents; due to the introduction of pyridine groups, the material has the characteristic of acid response, the fluorescence of the material can be obviously quenched by acid fumigation, and then the fluorescence can be restored under alkali fumigation; the compound also has the characteristic of mechanical discoloration, the solid material can be subjected to fluorescen