Described herein are polymer-encapsulated materials and a method for encapsulating materials with polymer via emulsion polymerization. The encapsulated materials include colorants (e.g., pigments and dyes, and in particular fluorescent dyes), optical brighteners, downconverters and upconverters. The encapsulated materials are produced by the emulsion polymerization of ethylenically unsaturated monomers. The polymer-encapsulation method described herein does not require the preparation of a miniemulsion homogenized with special equipment, such as an ultrasonification device, and the resulting polymer-encapsulated materials exhibit optical properties superior to polymer-encapsulated materials prepared by processes that include the preparation of a miniemulsion prepared with such special equipment, such as an ultrasonification device.

Provided is a near-infrared ray absorbing composition containing at least a near-infrared absorber, a metal compound, and a solvent, wherein the near-infrared absorber contains a metal ion, and the metal compound is a compound having a structure represented by the following Formula (I), Formula (II), or Formula (III),

M(OR.sub.1).sub.nFormula (I):

M.sup.n+(OR.sub.2O.sup.).sub.nFormula (II):

(OR.sub.3).sub.n-mM.sup.n+(.sup.OCOR.sub.4).sub.m,Formula (III): in the above Formulas (I), (II), and (III), M represents at least one metal element selected from the group consisting of titanium, zirconia, and aluminum; when M represents titanium or zirconia, n=4, m=1, 2, 3, or 4; when M represents aluminum, n=3, m=1, 2, or 3; R.sub.1 to R.sub.4 each independently represent an alkyl group having 1 to 30 carbon atoms, and R.sub.1 to R.sub.4 may further have a substituent.

Provided is a near-infrared ray absorbing composition containing at least a near-infrared absorber, a metal compound, and a solvent, wherein the near-infrared absorber contains a metal ion, and the metal compound is a compound having a structure represented by the following Formula (I), Formula (II), or Formula (III),

M(OR.sub.1).sub.nFormula (I):

M.sup.n+(OR.sub.2O.sup.).sub.nFormula (II):

(OR.sub.3).sub.n-mM.sup.n+(.sup.OCOR.sub.4).sub.m,Formula (III): in the above Formulas (I), (II), and (III), M represents at least one metal element selected from the group consisting of titanium, zirconia, and aluminum; when M represents titanium or zirconia, n=4, m=1, 2, 3, or 4; when M represents aluminum, n=3, m=1, 2, or 3; R.sub.1 to R.sub.4 each independently represent an alkyl group having 1 to 30 carbon atoms, and R.sub.1 to R.sub.4 may further have a substituent.

Provided are an organometallic compound represented by Formula 1, an organic light-emitting device including the organometallic compound, and a diagnostic composition including the organometallic compound.

M.sub.1(L.sub.11)n.sub.11(L.sub.12)n.sub.12<Formula 1> wherein L.sub.11 in Formula 1 is a ligand represented by Formula 1-1, and the descriptions of other substituents are the same as described in the detailed description of the present application:

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Provided are a resin composition including a compound represented by Formula (1) and a resin, an optical filter including the resin composition, a liquid crystal display device and a solid-state imaging element including the optical filter, and a compound suitable as a light absorbing component of the resin composition.

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In Formula (1), Dye represents a colorant structural part obtained by removing n1 hydrogen atoms from a squarylium compound having a specific structure, Q.sup.1 is a structural part including a metallocene structure, and n1 represents an integer of 1 to 6.

Provided are a resin composition including a compound represented by Formula (1) and a resin, an optical filter including the resin composition, a liquid crystal display device and a solid-state imaging element including the optical filter, and a compound suitable as a light absorbing component of the resin composition.

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In Formula (1), Dye represents a colorant structural part obtained by removing n1 hydrogen atoms from a squarylium compound having a specific structure, Q.sup.1 is a structural part including a metallocene structure, and n1 represents an integer of 1 to 6.

A dye composition dissolvable within a liquid crystal host device (including: polymer dispersed liquid crystal, polymer network liquid crystal, polymer stabilized liquid crystal, liquid crystal displays and similar devices), comprising eutectic mixtures of dichroic metallomesogen molecules. The aforesaid metallomesogen molecules comprise chromophore groups synthesized by physical and chemical mixing methods.

A dye composition dissolvable within a liquid crystal host device (including: polymer dispersed liquid crystal, polymer network liquid crystal, polymer stabilized liquid crystal, liquid crystal displays and similar devices), comprising eutectic mixtures of dichroic metallomesogen molecules. The aforesaid metallomesogen molecules comprise chromophore groups synthesized by physical and chemical mixing methods.

The present invention relates to compositions thermally curable on demand by red to near infrared irradiation, method of using same for thermal amplification of free radical polymerizations, and articles obtained by such method. The invention also relates to the use of a heat-generating dye in association with a thermal initiator for controlling the onset of thermal free radical polymerization.

The present invention relates to compositions thermally curable on demand by red to near infrared irradiation, method of using same for thermal amplification of free radical polymerizations, and articles obtained by such method. The invention also relates to the use of a heat-generating dye in association with a thermal initiator for controlling the onset of thermal free radical polymerization.