Light harvesting luminescent multichromophores that are configured upon excitation to transfer energy to, and amplify the emission from, an acceptor signaling chromophore in energy-receiving proximity therewith are provided. Also provided are compositions for labelling a target. The labelling composition may include a donor light harvesting multichromophore and an acceptor signaling chromophore in energy-receiving proximity to the donor light harvesting multichromophore. Also provided is an aqueous composition for labelling a target, including: a donor light harvesting multichromophore; an acceptor signaling chromophore in energy-receiving proximity therewith; and a sensor biomolecule. Methods for using the subject compositions are also provided.

A light-emitting element containing a light-emitting material with high light emission efficiency is provided. The light-emitting element includes a high molecular material and a guest material. The high molecular material includes at least a first high molecular chain and a second high molecular chain. The guest material has a function of exhibiting fluorescence or converting triplet excitation energy into light emission. The first high molecular chain and the second high molecular chain each include a first skeleton, a second skeleton, and a third skeleton, and the first skeleton and the second skeleton are bonded to each other through the third skeleton. The first high molecular chain and the second high molecular chain have a function of forming an excited complex.

Provided is a core-shell structured fluorescent complex comprising: a core portion comprising therein a polymer and a fluorescent material; and a shell portion including silica or alumina covering at least a part of a surface of the core portion, wherein the fluorescent material is included in greater than or equal to 0.01 parts by weight and less than or equal to 50 parts by weight with respect to 100 parts by weight of the polymer, and wherein the polymer is an ionic polymer or ionic polymer resin and has a weight average molecular weight of greater than or equal to 1,000 and less than or equal to 300,000, a light conversion film including the core-shell structured fluorescent complex, and an electronic device including the same.

A core/shell nanoparticle with enhanced emission comprises a fluorescent conjugated polymer core that is encapsulated by an amphiphilic block copolymer shell. The core/shell nanoparticle structure confines the electronic charge to improve quantum yield and is water soluble to enable low-cost and environmentally friendly processing.

A method of making a pyranine monomer composition comprises the step of reacting pyranine with a functionalizing agent that functionalizes the pyranine molecule with a polymerizable functional group to provide a composition of functionalized pyranine monomers, said functionalization reaction taking place in an aqueous reaction medium, and in the presence of a molar excess of said functionalizing agent, such that the functionalization reaction product is a monomer composition substantially free of unfunctionalized pyranine compound. The pyranine monomer compositions made by the method can be used to make fluorescent tagged water soluble polymer compositions that advantageously are substantially free of unpolymerized pyranine. The fluorescent tagged water soluble polymer compositions can be used in a method of inhibiting scale in industrial water systems.

The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.

A fluorescent infrared emitting composition comprising a mixture of a first material and a second material wherein the first material is a fluorescent infrared material and the second material is a fluorescent material having a higher photoluminescent quantum yield (PLQY) and shorter peak wavelength than the infrared emitting material. The composition may be used as the light-emitting layer of an organic light-emitting device.

A thermally activated delayed fluorescent material and a synthesizing method thereof are described. The thermally activated delayed fluorescent material has a structural formula as follows:

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Group A, group B, group C, and group D are all structural groups in the thermally activated delayed fluorescent material, where x, y, and z are molar ratios of the group B, the group C and the group D in the thermally activated delayed fluorescent material, respectively. A white light polymer material with high luminous efficiency is synthesized by using polystyrene as a main chain, and connecting red, green, and blue light-emitting structural units to side chains thereof. An OLED light-emitting layer prepared by using the thermally activated delayed fluorescent material has relatively high lifespan and good light-emitting performance.

Light harvesting luminescent multichromophores that are configured upon excitation to transfer energy to, and amplify the emission from, an acceptor signaling chromophore in energy-receiving proximity therewith are provided. Also provided are compositions for labelling a target. The labelling composition may include a donor light harvesting multichromophore and an acceptor signaling chromophore in energy-receiving proximity to the donor light harvesting multichromophore. Also provided is an aqueous composition for labelling a target, including: a donor light harvesting multichromophore; an acceptor signaling chromophore in energy-receiving proximity therewith; and a sensor biomolecule. Methods for using the subject compositions are also provided.

The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.