Coloring matter absorbing near-infrared ray and filter for cutting off near-infrared ray
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.
1. A near-infrared light absorbing dye obtained from a diimonium salt comprising a sulfonimide represented by the formula (1):
wherein, R individually represents an alkyl group, alkyl halide, aryl group, hydroxyl group, phenyl group, or phenylalkylene group, and R 1 and R 2 individually represent a fluoroalkyl group or combine to form a fluoroalkylene group.
2. The near-infrared light absorbing dye of claim 1 , wherein R 1 and R 2 individually represent a perfluoroalkyl group having 1-8 carbon atoms.
3. The near-infrared light absorbing dye of claim 2 , wherein R 1 and R 2 both represent a trifluoromethyl group or both represent a pentafluoroethyl group.
4. The near-infrared light absorbing dye of claim 1 , wherein R 1 and R 2 combine to form a perfluoroalkylene group having 2-12 carbon atoms.
5. The near-infrared light absorbing dye of claim 4 , wherein R 1 and R 2 combine to form a hexafluoropropylene group.
6. The near-infrared light absorbing dye of claim 1 , wherein R represents a linear or branched alkyl group having 1-8 carbon atoms or an alkyl halide.
7. The near-infrared light absorbing dye of claim 2 , wherein R represents a linear or branched alkyl group having 1 -8 carbon atoms or an alkyl halide.
8. The near-infrared light absorbing dye of claim 3 , wherein R represents a linear or branched alkyl group having 1 -8 carbon atoms or an alkyl halide.
9. The near-infrared light absorbing dye of claim 4 , wherein R represents a linear or branched alkyl group having 1 -8 carbon atoms or an alkyl halide.
10. The near-infrared light absorbing dye of claim 5 , wherein R represents a linear or branched alkyl group having 1 -8 carbon atoms or an alkyl halide.
11. The near-infrared light absorbing dye of claim 1 , wherein R represents a phenylalkylene group of the following formula:
wherein, A represents a linear or branched alkylene group having 1 -18 carbon atoms and B represents a substituted or unsubstituted benzene ring.
12. The near-infrared light absorbing dye of claim 2 , wherein R represents a phenylalkylene group of the following formula:
wherein, A represents a linear or branched alkylene group having 1 -18 carbon atoms and B represents a substituted or unsubstituted benzene ring.
13. The near-infrared light absorbing dye of claim 11 , wherein R represents a benzyl group or phenethyl group.
14. The near-infrared light absorbing dye of claim 12 , wherein R represents a benzyl group or phenethyl group.
15. A near-infrared light blocking Filter comprising the Near-infrared light absorbing dye of claim 1 .
16. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 2 .
17. A near-infrared light blocking Filter comprising the near-infrared light absorbing dye of claim 3 .
18. A near-infrared light blocking Filter comprising the near-infrared light absorbing dye of claim 4 .
19. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 5 .
20. A near-infrared light blocking Filter comprising the near-infrared light absorbing dye of claim 6 .
21. A near-infrared light blocking Filter comprising the near-infrared light absorbing dye of claim 7 .
22. A near-infrared light blocking Filter comprising the near-infrared light absorbing dye of claim 8 .
23. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 9 .
24. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 10 .
25. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 11 .
26. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 12 .
27. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 13 .
28. A near-infrared light blocking filter comprising the near-infrared light absorbing dye of claim 14 .