A chelate and associated security feature including a lanthanide metal and a ligand of formula (1), formula (2), or formula (3), ##STR00001##
where each of R.sub.1-R.sub.7 in formula (1) is independently selected from the group consisting of H, OH, NH.sub.2, Cl, F, OMe, OAr, OCF.sub.3, CF.sub.3, alkyl, aryl, phenyl, OPh, and heteroaromatic, where each of R.sub.1-R.sub.5 in formula (2) is independently selected from the group consisting of H, OH, NH.sub.2, Cl, F, OMe, OAr, OCF.sub.3, CF.sub.3, NMe.sub.2, CN, alkyl, aryl, phenyl, OPh, and heteroaromatic, and where R.sub.6 in formula (2) is selected from the group consisting of H, NH.sub.2, Cl, F, OMe, OAr, OCF.sub.3, CF.sub.3, NMe.sub.2, CN, alkyl, aryl, phenyl, OPh, and heteroaromatic, and where each of R.sub.1-R.sub.5 in formula (3) is independently selected from the group consisting of H, OH, NH.sub.2, Cl, F, OMe, OAr, OCF.sub.3, CF.sub.3, alkyl, aryl, phenyl, OPh, and heteroaromatic.

The present disclosure provides a method for forming a barrier coating on a surface of a substrate. The method includes applying a barrier coating forming solution to the substrate, allowing the applied barrier coating forming solution to partially cure, applying an antimicrobial coating forming solution atop the partially cured barrier coating forming solution, and allowing the two applied coatings to fully cure or dry to produce a multifunctional surface coating. The barrier coating forming solution includes at least one performance component other an antimicrobial component, and the antimicrobial coating forming solution includes an antimicrobial component. A formed multifunctional surface coating produced according to the method positions the antimicrobial component at a concentrated amount at or near the surface of the formed multifunctional coating.

The present disclosure provides a method for forming a barrier coating on a surface of a substrate. The method includes applying a barrier coating forming solution to the substrate, allowing the applied barrier coating forming solution to partially cure, applying an antimicrobial coating forming solution atop the partially cured barrier coating forming solution, and allowing the two applied coatings to fully cure or dry to produce a multifunctional surface coating. The barrier coating forming solution includes at least one performance component other an antimicrobial component, and the antimicrobial coating forming solution includes an antimicrobial component. A formed multifunctional surface coating produced according to the method positions the antimicrobial component at a concentrated amount at or near the surface of the formed multifunctional coating.

An antimicrobial coating composition is disclosed. The antimicrobial coating composition also includes a polymer having a plurality of alkene units and a plurality of macroCTA polymer units. The composition also includes one or more reactive silanes, one or more wetting agents, and one or more solvents. A method for applying an antimicrobial coating composition is disclosed. The method for applying an antimicrobial coating composition may include contacting a polymer, one or more wetting agents, one or more solvents, and one or more reactive silanes with one another to prepare an antimicrobial coating composition, homogenizing the antimicrobial coating composition, applying the antimicrobial coating composition to a substrate, and allowing the antimicrobial coating composition to dry at ambient conditions.

An antimicrobial coating composition is disclosed. The antimicrobial coating composition also includes a polymer having a plurality of alkene units and a plurality of macroCTA polymer units. The composition also includes one or more reactive silanes, one or more wetting agents, and one or more solvents. A method for applying an antimicrobial coating composition is disclosed. The method for applying an antimicrobial coating composition may include contacting a polymer, one or more wetting agents, one or more solvents, and one or more reactive silanes with one another to prepare an antimicrobial coating composition, homogenizing the antimicrobial coating composition, applying the antimicrobial coating composition to a substrate, and allowing the antimicrobial coating composition to dry at ambient conditions.

A radiative cooling composition comprises a first component having >55% reflectance in a wavelength range of 0.2 to 2.5 μm and a second component having >0.85 peak thermal emissivity for at least one wavelength in a range of 4-35 μm. A third pigmented component of the composition is configured to emit at least a fraction of absorbed energy, and in certain embodiments the pigmented component comprises at least one phosphor.

A radiative cooling composition comprises a first component having >55% reflectance in a wavelength range of 0.2 to 2.5 μm and a second component having >0.85 peak thermal emissivity for at least one wavelength in a range of 4-35 μm. A third pigmented component of the composition is configured to emit at least a fraction of absorbed energy, and in certain embodiments the pigmented component comprises at least one phosphor.

Provided is a semiconductor nanoparticle complex dispersion liquid in which semiconductor nanoparticles are dispersed in a polar dispersion medium at a high mass fraction, and in which high fluorescence quantum efficiency (QY) is maintained. A semiconductor nanoparticle complex dispersion liquid according to an embodiment includes a semiconductor nanoparticle complex dispersed in an organic dispersion medium, wherein: the semiconductor nanoparticle complex is composed of two or more ligands including an aliphatic thiol ligand and a polar ligand, and a semiconductor nanoparticle with the ligands coordinated to the surface thereof; the ligands are composed of an organic group and a coordinating group; the organic group of the polar ligand includes a hydrophilic functional group; and an SP value of the organic dispersion medium is 8.5 or more.

Provided is a semiconductor nanoparticle complex dispersion liquid in which semiconductor nanoparticles are dispersed in a polar dispersion medium at a high mass fraction, and in which high fluorescence quantum efficiency (QY) is maintained. A semiconductor nanoparticle complex dispersion liquid according to an embodiment includes a semiconductor nanoparticle complex dispersed in an organic dispersion medium, wherein: the semiconductor nanoparticle complex is composed of two or more ligands including an aliphatic thiol ligand and a polar ligand, and a semiconductor nanoparticle with the ligands coordinated to the surface thereof; the ligands are composed of an organic group and a coordinating group; the organic group of the polar ligand includes a hydrophilic functional group; and an SP value of the organic dispersion medium is 8.5 or more.

An ink composition including a mixed solvent including a first solvent and a second solvent, and a light emitting material, wherein the first solvent and the second solvent each have a vapor pressure of about 1×10.sup.−4 or greater and a boiling point of about 270° C. or less. The ink composition according to an embodiment may be applied to forming an emission layer of a light emitting diode to provide a light emitting diode having increased efficiency.