Trimethine cyanine and its use

摘要

The present invention relates to a trimethine cyanine represented by the formula (1):;
wherein all symbols are defined as in the specification.

主权项

1. A trimethine cyanine compound represented by the following formula (1): wherein: Q1, Q2, Q3, and Q4 are the same or different and each represents a substituted or unsubstituted benzene ring or naphthalene ring; A1 and A2 are the same or different and each represents a group of formulae  an oxygen atom, or a sulfur atom; Y1, Y2, Y3, and Y4 are the same or different and each represents an organic group having 1 to 18 carbon atoms; R1, R2, R3, R4, and R5 are the same or different and each represents a hydrocarbon group having 1-18 carbon atoms, which is substituted or unsubstituted; alternatively R3 and R4 can form a 3- to 6-member carbon ring which can further be fused with a benzene ring; B is a divalent linking group represented by the following formula (a) or (b): wherein:P1 and P2 are the same or different and each represents a hydrogen atom or an organic group having 1 to 8 carbon atoms; alternatively P1 and P2 can form a 3- to 6-member carbon ring which can further be fused with a benzene ring;wherein:
E is an oxygen atom, a sulfur atom, R6, R7 and R8 each represents a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms; alternatively R6 and R7 can form a 3- to 6-member carbon ring; Xm− represents an anion having m valence; m represents an integral of 1, 2, or 3; q represents the number attributing the compound with electronic neutrality.