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    • 3. 发明申请
    • OPTICAL INFORMATION RECORDING MEDIUM
    • 光信息记录介质
    • US20090029092A1
    • 2009-01-29
    • US11909579
    • 2006-03-23
    • Kousuke WatanabeTetsuya WatanabeKeita TakahashiKazutoshi KatayamaChisato Obara
    • Kousuke WatanabeTetsuya WatanabeKeita TakahashiKazutoshi KatayamaChisato Obara
    • G11B7/246B32B3/02
    • G11B7/249G11B7/245G11B7/246G11B7/2467G11B7/2478G11B7/2492G11B7/2495G11B7/2498G11B7/2531G11B7/2532G11B7/2533G11B7/2534G11B7/2535G11B7/256G11B7/259G11B2007/24612
    • The invention provides an optical information recording medium having a recording layer capable of recording information by irradiating the recording layer with a laser beam of 440 nm or less.In the optical information recording medium, the recording layer contains an oxonol dye represented by formula (1), and a counter cation (Yt+) of this dye is a cationic dye having an absorption maximum in a range of longer wavelengths than an absorption maximum of an anionic part of the oxonol dye. In the formula, A, B, C and D each represents an electron-withdrawing group. A and B or C and D may be combined with each other to form a ring. If these are not combined with each other, these are electron-withdrawing groups in which the sum of Hammett's σp values of A and B and the sum of Hammett's σp values of C and D are each greater than 0.6. R represents a substituent group on methine carbon, and m represents an integer of 0 to 1. n represents an integer of 0 to 2m+1. If n is 2 or greater, a plurality of R's may be different from each other, and R and R may be combined together to form a ring. Yt+ represents a t-valent cation, and t represents an integer of 1 to 4.
    • 本发明提供了一种光信息记录介质,其具有能够通过用440nm或更小的激光照射记录层来记录信息的记录层。 在光学信息记录介质中,记录层含有由式(1)表示的氧杂菁染料,该染料的抗衡阳离子(Yt +)是具有比最大吸收波长更长的波长的吸收最大值的阳离子染料 氧杂菁染料的阴离子部分。 在该式中,A,B,C和D各自表示吸电子基团。 A和B或C和D可以彼此组合以形成环。 如果这些不相互结合,则这些是吸电子基团,其中A和B的Hammett sigmap值之和以及C和D的Hammett sigmap值之和大于0.6。 R表示次甲基碳上的取代基,m表示0〜1的整数.n表示0〜2m + 1的整数。 如果n为2以上,则多个R可以相互不同,R和R可以组合在一起形成环。 Yt +表示t价阳离子,t表示1〜4的整数。