Near-infrared-ray absorbing material containing cyanine compound, and cyanine compound
US8460858B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2009 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | May 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/208
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A near-infrared-ray absorbing material containing a cyanine compound per formula (I) exhibits a sharp light absorption in wavelength range 800-1000 nm, with excellent light resistance. R1 - R4, Y1, Y2 represents hydrogen atom, a group of formula (II) or (II′), etc., and Anq− represents a q-valent anion, provided that at least R1 is a group of formula (II) or (II′) or Anq− is an ion of formula (III); R11 - R13 each represents a hydrogen atom, hydroxyl group, etc.; Z1, Z2 represents a C1-10 alkyl group, etc. In formula (II′), the bond between G′ and T′ is a double bond or a conjugated double bond; G′ represents a carbon atom; T′ represents a carbon atom or a nitrogen atom; the ring including G′ and T′ represents a 6-membered ring, etc.; w′ is 0-4; and R01′ represents a hydrogen atom, hydroxy, etc. In formula (III), R5 and R6 represents a halogen-substituted C1-8 alkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.