Resin composition, toner for developing electrostatic charge image, image forming method, photosensitive adhesive, and optical switching material

A resin composition comprising:

• 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,
• wherein the first group and the second group are each independently a residue of any one compound selected from the group consisting of adenine, guanine, cytosine, thymine, uracil, urea, thiourea, melamine, cyanuric acid, barbituric acid, a 2,6-diacylaminopyridine, 2,6-diacetylaminopyridine, 4,6-diamino-2 pyrimidinone, 2-amino-4,6-pyrimidinedinone, 2,4,6-triaminopyrimidine, phthalimide, 2,6-diamino-1,3,5-triazine, 2-ureido-4-amino-1,3,5-triazine, and 2-ureido-4 pyrimidinone,
• the resin contains a structure represented by general formula (1):
• -M-B1
• wherein
• M represents a linking group, and
• B1 represents the first group capable of forming at least two hydrogen bonds, and
• the photoisomerization compound is a compound represented by general formula (2):
• wherein
• L1 and L2 each independently represent a linking group,
• A1 and A2 each independently represent a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted aromatic heterocyclic group,
• Z1 and Z2 each independently represent N or CH,
• B2 represents the second group capable of forming at least two hydrogen bonds complementarily with the first group,
• n is an integer of 1 to 10, and
• G represents the second group capable of forming at least two hydrogen bonds complementarily with the first group when n is 1, and represents an n-valent substituent or an n-valent third group capable of forming at least two hydrogen bonds complementarily with the first group when n is 2 to 10.