Near-infrared-absorbing dyes and near-infrared cut-off filter

2003 
Near infrared absorbing dyes are disclosed comprising a sulfonimide represented by the general formula (1) from a salt of a diimmonium to anionic component. (Wherein, R is the same or different, an alkyl group, a halogenated alkyl group, cyanoalkyl group, an aryl group, a hydroxyl group, a group selected from the group consisting of phenyl and phenyl alkylene group, R The near infrared absorbing dye is excellent in heat resistance and moisture resistance, the near infrared absorption capacity is not reduced over time. Furthermore, near infrared blocking filter which has been prepared using the near infrared absorbing dye of the present invention is excellent in heat resistance and moisture resistance, the plasma display panel, an optical lens, automotive glass, applications such as building materials for glass it is capable of use widely.
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