Photoresponsive compound

A compound represented by the following general formula (1), which is fluidized by light irradiation:

• R1—CH═N—R2 General Formula (1)
• wherein
• R1 is a substituted or unsubstituted cyclic hydrocarbon group or a substituted or unsubstituted heterocyclic group,
• R2 is a 5-membered heterocyclic group containing a nitrogen atom bonded to the nitrogen atom in the general formula (1), the 5-membered heterocyclic group being unsubstituted or substituted with an alkyl group having 1 to 18 carbon atoms, and
• wherein R1 comprises a benzene ring bonded to the carbon atom in the general formula (1), the benzene ring has a substituent at least at a para position with respect to the carbon atom in the general formula (1), and the substituent is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, a dialkylamino group having 2 to 10 carbon atoms, an acyl group having 2 to 19 carbon atoms, and an alkoxycarbonyl group having 2 to 19 carbon atoms.