| abstract |
An infrared absorbent comprising a metal complex compound prepared by coordinating two thiorato bidentate ligands to a center metal and neutralizing a complex ion with a cation. With use of the infrared absorbent, there is provided an infrared absorbing material capable of absorbing a far-infrared or near-infrared light having a wavelength of 700-1500 nm which has a high transmittance of a visible light and a good fastness to heat and light. The infrared absorbing material can be used for an infrared absorbing material such as an optical filter or other various objects. |