Infrared absorbent and optical material using the same
AssigneeFuji Photo Film Co., Ltd.
InventorsYoshiaki Suzuki, Gouichi Hayashi, Masayoshi Tsuboi
Life of this patent
Estimating the term…
Abstract
An infrared absorbent comprising .alpha.-diimine metal complex is disclosed. With the use of the infrared absorbent, there is provided an infrared absorbing material capable of absorbing a near-infrared light having a wavelength of 700-1500 nm and a far-infrared light. The infrared absorbent has a good fastness to heat and light. The infrared absorbing material is suitable for an optical filter and optical information recording medium.
Claims26
An infrared absorbent composition comprising at least one compound selected from metal complex compounds represented by the following general formulae [I]-[VI]:
- ##STR22## wherein, R.sup.1 to R.sup.4 each independently represents a hydrogen atom, halogen atom, cyano group or hydroxyl group, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group which may be bonded through a divalent connecting group to a benzene ring, or a group of nonmetal atoms forming at least one substituted or unsubstituted five-membered or six-membered ring by bonding of R.sup.1 and R.sup.2, R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 ;
- R.sup.1 to R.sup.4 may be the same or different;
- X and Y represent anions capable of neutralizing cations in the above-mentioned general formulae;
- Z represents a halogen and thiocyanate ion;
- and L represents a monodentate ligand containing a nitrogen, phosphorus or sulphur atom as a coordinate element.
An infrared absorbing material comprising, as an infrared absorbent, at least one compound selected from metal complex compounds represented by the following general formulae [I]-[VI] ##STR23## wherein, R.sup.1 to R.sup.4 each independently represents a hydrogen atom, halogen atom, cyano group or hydroxyl group, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group which may be bonded through a divalent connecting group to a benzene ring, or a group of nonmetal atoms forming at least one substituted or unsubstituted five-membered or six-membered ring by bonding of R.sup.1 and R.sup.2, R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 ;
- R.sup.1 to R.sup.4 may be the same or different;
- X and Y represent anions capable of neutralizing cations in the above-mentioned general formulae;
- Z represents a halogen and thiocyanate ion;
- and L represents a monodentate ligand containing a nitrogen, phosphorus or sulphur atom as a coordinate element.
A compound selected from the group consisting of the metal complex compounds represented by the following general formulae [I]-[VI]:
- ##STR24## wherein, R.sup.1 to R.sup.4 each independently represents a hydrogen atom, halogen atom, cyano group or hydroxyl group, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group which may be bonded through a divalent connecting group to a benzene ring, or a group of nonmetal atoms forming at least one substituted or unsubstituted five-membered or six-membered ring by bonding of R.sup.1 and R.sup.2, R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 ;
- R.sup.1 to R.sup.4 may be the same or different;
- X and Y represent anions capable of neutralizing cations in the above-mentioned general formulae;
- Z represents a halogen and thiocyanate ion and L represents a monodentate ligand containing a nitrogen, phosphorus or sulphur atom as a coordinate element.
Dependencies are inferred from the claim text.