申请人:SAMSUNG ELECTRONICS CO., LTD.
公开号:EP1152038A1
公开(公告)日:2001-11-07
A hemicyanine dye of formula (1) and an optical recording medium using the hemicyanine dye as an optical recording medium are provided:
wherein Z is a benzene ring, naphthalene ring or anthracene ring; X1 is S, O, Se, NR or C(CH3)2; X2 is S, NR or O, where R is hydrogen or an alkyl group of 1 to 5 carbon atoms; R1 is hydrogen, halogen atoms, an alkyl group of 1 to 3 carbon atoms or a nitro group; each of R2 and R5 is an alkyl group of 1 to 5 carbon atoms; each of R3 and R4 is hydrogen, an hydroxy group, an alkyl group of 1 to 4 carbon atoms, a halogen atom or a halide; Y is Cl, Br, I, CIO4, BF4, BrO4, PF6, CH3SO3, CF3SO3, 4-CH3C6H4SO3, C6H5SO3, 6-SO3C10H6SO3 or HSO4; n is an integer of 0-2; and m is an integer of 1-2. The hemicyanine dye having formula (1) above is easy to synthesize with high yield. Thus, use of the hemicyanind dye as an optical recording medium is advantageous in terms of the manufacturing costs. An optical recording medium using the hemicyanine dye has improved recording characteristics in terms of jitter and modulation factor.
提供一种半靛染料(1)及使用该半靛染料作为光记录介质的光记录介质:其中Z是苯环、萘环或蒽环;X1是S、O、Se、NR或C(CH3)2;X2是S、NR或O,其中R是氢或1至5个碳原子的烷基;R1是氢、卤素原子、1至3个碳原子的烷基或硝基;R2和R5中的每一个都是1至5个碳原子的烷基;R3和R4中的每一个都是氢、羟基、1至4个碳原子的烷基、卤素原子或卤化物;Y是Cl、Br、I、CIO4、BF4、BrO4、PF6、CH3SO3、CF3SO3、4-CH3C6H4SO3、C6H5SO3、6-SO3C10H6SO3或HSO4;n是0-2的整数;m是1-2的整数。具有上述式(1)的半靛染料易于合成,收率高。因此,使用该半靛染料作为光记录介质在制造成本方面具有优势。使用该半靛染料的光记录介质在抖动和调制因子方面具有改进的记录特性。