Photoacid generator, and photosensitive composition using same
AssigneeSan-Apro Ltd.
InventorsAtsushi Shiraishi, Futaba Kawakami
Life of this patent
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Abstract
Provided are: a photoacid generator that effectively generates acid even when a substance such as a colorant which attenuates or blocks radiated light is present at a high concentration, the film thickness thereof is large, and a light source is visible light to infrared light, particularly infrared light having low energy; and a highly curable photosensitive composition using the photoacid generator. The present invention is a photoacid generator that is a metal complex having, as a ligand, a ring structure formed by bonding five-membered ring aromatic heterocyclic compounds directly or by n-conjugation, wherein a central metal has one or two axial ligands, and the axial ligand has an onium salt structure.
Claims4
A photoacid generator that is a metal complex having, as a ligand, a ring structure formed by bonding five-membered ring aromatic heterocyclic compounds directly or by π-conjugation, wherein a central metal has one or two axial ligands, and the axial ligand has an onium salt structure, wherein the metal complex is represented by general Formula (1) or general Formula (2):
- in Formula (1), R1 to R5 are a substituent of the aromatic heterocycle, R1 and R2, R3 and R4, R5 and R6, R7 and R8 may be bonded each other to form a condensed polycyclic aromatic structure;
- Y represents a nitrogen atom, a carbon atom or may be bonded directly, when Y represents a carbon atom, the carbon atom is substituted with a hydrogen atom or an aromatic hydrocarbon having 6 to 14 carbon atoms:
- M is selected from the group consisting of Al, Ga, In, Si, Ge, Sn, Fe, Ti, Co and Mn;
- L1 and L2 are an axial ligand coordinated to the central metal, represented by Formula (3), when M is Al, G&, In, Fe, Co or Mn, the central metal has L1 only as the axial ligand:
- in Formula (2) represents a case when the central metal M is cationic:
- R1 to R8, Y, L1 and L2 are the same as these of Formula (1);
- M is selected from the grout consisting of P, Sb and Bi;
- X2− represents a monovalent counter anion corresponding to the central metal cation,
- in Formula (3), D represents an oxygen atom or a sulfur atom:
- E represents an alkylene group having 1 to 8 carbon atoms, an alkenylene group having 2 to 8 carbon atoms, an alkynilene group having 2 to 8 carbon atoms or an arylene group having 6 to 14 carbon atoms, a main chain of E may contain an ether group, a sulfide group, a ketone group, an amide group, an ester group, a thioester group, an urea group, a sulfone group, a silyl group or a phenylene group:
- A+ represents a monovalent onium cation selected from a sulfonium cation, a diazonium cation or an iodonium cation:
- X1− represents a monovalent counter anion corresponding to the onium cation.
Dependencies are inferred from the claim text.