Cyanine compound, optical recording material, and optical recording medium
US7553604B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2004 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Nov 30, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cyanine compound represented by formula (I):wherein ring A and ring B each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted naphthalene ring; R1, R2, R3, and R4 each represent an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted benzyl group, or R1 and R2 are taken together, or R3 and R4 are taken together, to form a 3- to 6-membered ring, provided that at least one of R1, R2, R3, and R4 is a substituted benzyl group; Y1 and Y2 each represent an organic group having 1 to 30 carbon atoms; Anm− represents an m-valent anion; m represents an integer 1 or 2; and p represents a coefficient for maintaining overall charge neutrality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.