To provide a near-IR absorption compound free from antimony or arsenic and excellent in stability, especially, in heat resistance, light fastness, and moisture-and-heat resistance and also an IR absorption filter, an optical information recording medium, and a resin composition excellent in durability by using the near-IR absorption compound.
The near-IR absorption compound is a diimmonium compound having the following structure and the resin composition contains the diimmonium compound:
(wherein R1 to R8 independently denote hydrogen atom or an optionally substituted aliphatic hydrocarbon group; R9 and R10 independently denote an aliphatic hydrocarbon group optionally containing a halogen atom; and rings A and B may further have substituent groups.).
提供一种不含
锑、
砷且稳定性,特别是耐热性、耐光性和耐湿热性优异的近红外吸收化合物,以及一种使用该近红外吸收化合物的红外吸收滤光片、光学信息记录介质和耐久性优异的
树脂组合物。
近红外吸收化合物是具有以下结构的二
铵盐化合物,
树脂组合物含有二
铵盐化合物:
(其中 R1 至 R8 独立地表示氢原子或任选取代的脂族烃基;R9 和 R10 独立地表示任选含有卤素原子的脂族烃基;环 A 和 B 可进一步具有取代基)。