Abstract: Provided is a compound that is fluidized by light irradiation and reversibly non-fluidized, and is not significantly colored. Provided is a photoresponsive compound represented by the following general formula (1), the photoresponsive compound being fluidized by light irradiation and reversibly non-fluidized: R1—Z1?Z2—R2??General formula (1) wherein Z1 and Z2 are N or CH, while Z1?Z2, R1 contains an aromatic hydrocarbon structure, R2 contains an aromatic heterocyclic structure, and a hydrogen atom is bonded to at least one carbon atom bonded adjacent to a carbon atom in the aromatic heterocyclic structure bonded to the Z2.

Abstract: Provided is a compound that is fluidized by light irradiation and reversibly non-fluidized, is not significantly colored, and improves fixability and exhibits excellent image stability and color reproducibility when used for a toner. Provided is a compound represented by the following general formula (1), which is fluidized by light irradiation and reversibly non-fluidized: wherein Z1 and Z2 are CH or N, and Z1?Z2; R1 is an aromatic hydrocarbon group having a substituent Ra selected from the group consisting of an alkyl group, an alkoxy group and a halogen atom at each of two ortho positions with respect to Z1; and R2 is a substituted or unsubstituted aromatic heterocyclic group.

Abstract: Provided is a compound which is fluidized by light irradiation and is less colored. The compound is 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; and R2 is a substituted or unsubstituted heterocyclic group containing a nitrogen atom bonded to the nitrogen atom in the general formula (1).

Abstract: A photoresponsive polymer includes a structural unit represented by the following general formula (1), the photoresponsive polymer being fluidized by light irradiation, and reversibly non-fluidized: [Chemical formula 1] R1—Z1?Z2—R2??General formula (1) in the formula, Z1 and Z2 each represent CH or N, and Z1?Z2, R1 represents an aromatic hydrocarbon group having a substituent Ra selected from the group consisting of an alkyl group, an alkoxy group, and a halogen atom at each of two ortho positions with respect to Z1, R2 represents an aromatic heterocyclic group with or without a substituent, and at least one of the R1 and the R2 is bonded to a group containing a structure derived from a polymerizable group.

Abstract: A resin composition includes: a resin having a first group capable of forming at least two hydrogen bonds; and a photoisomerization compound having a second group capable of forming at least two hydrogen bonds complementarily with the first group and having a moiety that is reversibly isomerized by light.

Abstract: A photoresponsive polymer that is fluidized by light irradiation and reversibly non-fluidized and contains a structural unit represented by a general formula (1) shown below: wherein each substituent is defined as described in the specification.

Abstract: A compound that is fluidized by light irradiation and reversibly non-fluidized and is represented by the following general formula (1): In the general formula (1), Ar1 and Ar2 each independently represent an aromatic hydrocarbon group optionally having a substituent or an aromatic heterocyclic group optionally having a substituent, and Y, Z1, and Z2 each independently represent a hydrogen atom or a lower alkyl group.

Abstract: An object of the present invention is to provide a photoresponsive polymer that sufficiently secures photoresponsiveness to be fluidized by light irradiation and reversibly non-fluidized, improves fixability, and further has good color reproducibility. Provided is a photoresponsive polymer containing a structural unit derived from a specific azomethine derivative, the photoresponsive polymer being fluidized by light irradiation and reversibly non-fluidized.

Abstract: Provided is a compound that is fluidized by light irradiation and reversibly non-fluidized, and is not significantly colored. Provided is a photoresponsive compound represented by the following general formula (1), the photoresponsive compound being fluidized by light irradiation and reversibly non-fluidized: R1—Z1?Z2—R2??General formula (1) wherein Z1 and Z2 are N or CH, while Z1?Z2, R1 contains an aromatic hydrocarbon structure, R2 contains an aromatic heterocyclic structure, and a hydrogen atom is bonded to at least one carbon atom bonded adjacent to a carbon atom in the aromatic heterocyclic structure bonded to the Z2.

Abstract: A composition includes an isomerized polymer containing a structural unit containing an isomerized structure and an isomerized low molecular weight compound, the composition being fluidized by light irradiation from a solid state and being reversibly non-fluidized.