Provided are: an organic electronic material which can be easily multilayered and that can be used in substrates, such as resin, that cannot be processed at high temperatures; an ink composition containing the same; an organic thin film formed using said organic electronic material or said ink composition; and an organic electronic element and an organic EL element that are formed using said organic thin film and that have a superior luminous efficacy and emission lifespan than conventional elements. Specifically, provided are: an organic electronic material that is characterized by containing an oligomer or a polymer having a structure that branches into three or more directions and has at least one polymerizable substituent; an ink composition containing said organic electronic material; and an organic thin film prepared using the aforementioned organic electronic material. Further, provided are an organic electronic element and an organic electroluminescent element containing said organic thin film.

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 liquid composition that is an aqueous liquid composition that emits light when irradiated with ultraviolet light contains a resin particle, the resin particle containing a unit that has a polar group and containing a complex composed of a sulfur-bridged calixarene and a lanthanoid ion, the polar group being at least one selected from the group consisting of an ester group, a carboxy group, a hydroxy group, an ether group, an amino group, an amide group and a cyano group.

The present invention relates to a curable resin composition comprising a curable resin mixture and at least one C.sub.2-C.sub.3-alkenyl-substituted compound of formula (I) wherein m is 1, 2 or 3; R.sup.m1, R.sup.m2, R.sup.m3 and R.sup.m4 are hydrogen or C.sub.6-C.sub.14-aryloxy, which is substituted by one or more radicals selected from C.sub.1-C.sub.24-alkyl and C.sub.6-C.sub.14-aryl-C.sub.1-C.sub.10-alkylene; R.sup.5, R.sup.6, are hydrogen or optionally substituted C.sub.6-C.sub.14-aryl, or R.sup.5 and R.sup.6 together are a diradical of the formula A; A is a diradical of the formulae A.1 or A.2 wherein R.sup.7 is C.sub.2-C.sub.3-alkenyl; R.sup.8, n are as defined in the claims and in the description. The present invention also relates to a polymer comprising in copolymerized form at least one compound of formula (I) and an organopolysiloxane and to novel compounds of formula (I).

##STR00001##

Provided are: an organic electronic material which can be easily multilayered and that can be used in substrates, such as resin, that cannot be processed at high temperatures; an ink composition containing the same; an organic thin film formed using said organic electronic material or said ink composition; and an organic electronic element and an organic EL element that are formed using said organic thin film and that have a superior luminous efficacy and emission lifespan than conventional elements. Specifically, provided are: an organic electronic material that is characterized by containing an oligomer or a polymer having a structure that branches into three or more directions and has at least one polymerizable substituent; an ink composition containing said organic electronic material; and an organic thin film prepared using the aforementioned organic electronic material. Further, provided are an organic electronic element and an organic electroluminescent element containing said organic thin film.

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:

##STR00001##

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.

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.

The present disclosure relates to a polymer including a unit represented by Chemical Formula 1 and a unit represented by Chemical Formula 2, a coating composition including the polymer, and an organic light emitting device formed using the same.

Nanoparticle compositions comprising nanoparticles formed from -conjugated cross-linked polymers are disclosed, together with their methods of manufacture and their applications. Owing to the nature of the cross-links formed therein, the nanoparticle compositions afford a high degree of manufacturing flexibility and control, as well as being amenable to facile purification for the purpose of imaging and electronics applications.

A chromene compound having at least one indenonaphthopyran moiety which has a group forming a spiro ring together with the 13-position carbon atom and further an oligomer chain group selected from a polyalkylene oxide oligomer chain group having at least three recurring units and a polyester oligomer chain group having at least three recurring units, represented by the following formula and having reduced matrix dependence:

##STR00001##

wherein R.sup.1 and R.sup.2 are each a group which may have an oligomer chain group, the ring Z bonded to the 13-position carbon atom of the chromene compound is a Spiro ring group, and R.sup.3 and R.sup.4 are each an aryl group or heteroaryl group which may have an oligomer chain group.

Preferably, the chromene compound has at least one oligomer chain group in the molecule.