Cyanine compound, optical recording material using the same and optical recording medium

By introducing substituents into cyanine compounds and optimizing their molecular structures, the problem of insufficient thermal decomposition in the existing technology has been solved, an optical recording material more suitable for high-speed recording has been realized, and the sensitivity and adaptability have been improved.

CN102675304AInactive Publication Date: 2012-09-19ADEKA CORP
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Patent Information

Application Number
CN201210063842.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2004-11-25
Filing Date
2005-10-13
Publication Date
2012-09-19
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing cyanine compounds have deficiencies in thermal decomposability and are difficult to meet the demand for optical recording media for high-speed recording.

Method used

A new cyanine compound with a specific molecular structure was developed. By introducing substituents on the benzyl and indole skeletons, its decomposition temperature and absorption wavelength were optimized to adapt to optical recording materials for high-speed recording.

Benefits of technology

It achieves a lower decomposition temperature and appropriate absorption wavelength, improves the sensitivity and adaptability of optical recording materials, and is an optical recording medium suitable for high-speed recording.

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Abstract

A cyanine compound of the present invention is represented by general formula (I) below and suitable as an optical recording material used in a recording layer of optical recording media on which recording and play-back are conducted with laser beam. The cyanine compound of the present invention particularly exhibits appropriate thermal decomposition behavior to attain sensitivity compatible with high-speed recording. In the formula (I), each of ring A and ring B represents a benzene or naphthalene ring; each of R1 and R2 independently represents an alkyl group having 1 to 4 carbon atoms or a benzyl group; at least one of R1 and R2 is a benzyl group; X represents O or S; each of Y1 and Y2 independently represents a methyl group, an ethyl group or a buthyl group; Z represents a hydrogen atom; An represents a phosphorus hexafluoride anion; and p represents a coefficient to keep an electric charge neutral. The formula (I) is shown in the description.
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