Silver halide emulsion and heptamethine cyanine dye

摘要

A silver halide emulsion containing at least one member of methine dyes represented by the following general formula (I):wherein MET represents an atomic group having a methine dye structure; Q represents a bivalent bonding group comprising at least one atom of carbon atom, nitrogen atom, sulfur atom and oxygen atom or an atomic group having at least one atom of carbon atom, nitrogen atom, sulfur atom and oxygen atom; Ar represents a group which has an aromatic character and derives from a polycyclic compound composed of 8 or more atoms excluding nitrogen atom; ℓ₁ represents 1 or 2; ℓ₂ represents 0 or 1; and 1₃ represents 1, 2, 3 or 4.