| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a novel croconium compound that exhibits high light resistance, heat resistance and moisture resistance and excellent color tones and is suitable for use as an optical filter or the like. <P>SOLUTION: The croconium compound is represented by general formula (1) [wherein R<SB>11</SB>and R<SB>12</SB>are each independently a hydrogen atom, an alkyl group or an aryl group; X<SB>11</SB>and X<SB>12</SB>are each independently an oxygen atom, a sulfur atom or N-R<SB>13</SB>(wherein R<SB>13</SB>is an alkyl, cycloalkyl or aryl group); and A<SB>11</SB>-A<SB>14</SB>are each independently a substituent group]. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
