A coloring matter absorbing a near-infrared ray which comprises a diimonium salt containing a sulfonimide as an anion moiety, represented by the general formula (1):
wherein R may be the same or different and represents a moiety selected from the group consisting of an alkyl group, a halogenated alkyl group, a cyanoalkyl group, an aryl group, a hydroxyl group, a phenyl group, and a phenylalkylene group, and R
1
and R
2
may be the same or different and each represent a fluoroalkyl group, or together form a fluoroalkylene group.
The coloring matter absorbing a near-infrared ray is excellent in the resistance to heat and moisture, and thus exhibits an ability of absorbing a near-infrared ray not lowering for a long period of time. A filter for cutting off a near-infrared ray manufactured by using the coloring matter can be advantageously used for wide applications such as a plasma display panel, an optical lens, a glass for an automobile, and a glass for a building material, due to its excellent resistance to heat and moisture.
一种吸收近红外射线的
着色剂,它包括一种含有磺
酰亚胺作为阴离子的二
铵盐,通式(1)表示:
其中 R 可以相同或不同,并代表选自由烷基、卤代烷基、
氰基烷基、芳基、羟基、苯基和苯基烯基组成的基团,以及 R
1
和 R
2
可以相同或不同,各自代表一个氟烷基,或共同构成一个
氟亚烃基。
这种吸收近红外线的
着色剂具有优异的耐热性和耐湿性,因此具有长时间不降低吸收近红外线的能力。使用该
着色剂制造的近红外滤光片具有优异的耐热性和耐湿性,可广泛应用于等离子显示面板、光学镜片、汽车
玻璃和建筑材料
玻璃等领域。