Method of producing a desubstituted compound, organic semiconductor film and method of producing the same

A method of producing pigment fine-particles, comprising:

• applying an external stimulation to a pigment precursor A-(B)m of a structure in which a pigment is modified with a solvent-soluble group B, to cause desubstitution of the solvent-soluble group B from the pigment precursor, wherein A represents a residue of a pigment, the solvent-soluble group B is represented by formula (I), and m represents a natural number, in which the solvent-soluble group B bonds to a carbon atom of the residue A of a pigment;
• and
• converting the pigment precursor to a pigment to which a hydrogen atom bonds in place of the solvent-soluble group B:
• —S(O)n—X Formula (I)
• wherein X represents a hydrogen atom or a substituent;
• and n represents an integer of 1 or 2.

A method of producing a phthalocyanine compound, comprising:

• applying an external stimulation to a phthalocyanine compound having a substituent represented by formula (I), thereby causing desubstitution of the substituent from the phthalocyanine compound, wherein the substituent binds to a carbon atom of a residue of the phthalocyanine compound;
• and
• converting the phthalocyanine compound having the substituent to a phthalocyanine compound to which a hydrogen atom bonds in place of the substituent:
• —S(O)n—X Formula (I)
• wherein X represents a hydrogen atom or a substituent;
• and n represents an integer of 1 or 2.

A method of producing a thin film, comprising:

• dissolving a compound A-(B)m which has a solvent-soluble group B, in a solvent, to give a solution, wherein A represents a residue of a solvent-insoluble compound, the solvent-soluble group B is represented by formula (I), and m represents a natural number, in which the solvent-soluble group B bonds to a carbon atom of the residue A of a solvent-insoluble compound;
• coating a substrate with the solution, to form a coated film;
• applying an external stimulation to the compound A-(B)m in the coated film, to cause desubstitution of the solvent-soluble group B from the compound;
• and
• converting the compound A-(B)m to a solvent-insoluble compound to which a hydrogen atom bonds in place of the solvent-soluble group B, thereby forming a thin film of the solvent-insoluble compound:
• —S(O)n—X Formula (I)
• wherein X represents a hydrogen atom or a substituent;
• and n represents an integer of 1 or 2.

A method of producing an organic semiconductor film, comprising the steps of:

• forming a film of a π-conjugated compound having a substituent represented by formula (2-I), on a substrate;
• and
• causing desubstitution of the substituent from the compound:
• wherein R11 represents a substituent other than a hydrogen atom.