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    • 4. 发明申请
    • 近赤外線吸収化合物、それを用いる近赤外線吸収フィルター
    • 近红外吸收化合物和近红外吸收过滤器
    • WO2004068199A1
    • 2004-08-12
    • PCT/JP2004/000535
    • 2004-01-22
    • 日本化薬株式会社北山 靖之山村 重夫
    • 北山 靖之山村 重夫
    • G02B5/22
    • G02B5/223
    • A near-infrared absorbing filter which does not contain antimony, arsenic or the like and is excellent in heat resistance is disclosed. The near-infrared absorbing filter is characterized by containing a compound composed of a salt of cations obtained by oxidizing a substance represented by the formula (1) below and anions (X), which are alkylsulfonic acid ions having 1-8 carbon atoms that are necessary for neutralizing the cations and not substituted or may be substituted with a halogen atom, a lower alkoxy group, a cyano group, or a hydroxyl group. (1) (in the formula (1), rings A and B may have a substituent, and R1-R8 independently represent a substituted or non-substituted alkyl group, cycloalkyl group, alkenyl group or aryl group having 1-8 carbon atoms.)
    • 公开了一种不含锑,砷等并且耐热性优异的近红外吸收滤光器。 近红外线吸收滤光器的特征在于含有由下述通式(1)表示的物质氧化得到的阳离子的化合物和作为碳原子数1〜8的烷基磺酸离子的阴离子(X) 必须用于中和阳离子而不被取代或可被卤素原子,低级烷氧基,氰基或羟基取代。 (1)(式(1)中,环A和环A可以具有取代基,R 1〜R 8分别独立地表示碳原子数1〜8的取代或未取代的烷基,环烷基,链烯基或芳基。 )