Provided herein is a narrow-range polyacetylene ester compound and a preparation method. The narrow-range polyacetylene ester compound has a structural formula as represented by formula (I). The method includes: in atmospheric carbon dioxide environment, a bifunctional alkyne monomer, carbon dioxide, and a dihalide monomer perform polymerization reaction by means of a combined action of a catalyzer and alkali, dissolve the product into an organic solvent, then add same to a precipitant for precipitation, collect precipitates, and dry same to the constant weight to obtain the narrow-range polyacetylene ester compound. The reaction is carried out in atmospheric carbon dioxide atmosphere, and carbon dioxide is involved as a monomer in the formation of a polymer. The obtained narrow-range polyacetylene ester compound has good thermal stability and excellent processability. Due to introduction of an aggregation-induced emission group, some polymers show a typical aggregation-induced emission performance.

##STR00001##

A composition suitable for use in an organic light-emitting layer (103) of an organic light-emitting device having an anode (101) and a cathode (105), the composition comprising a fluorescent light-emitting material, a first triplet-accepting material and a second triplet-accepting material that is different from the first triplet-accepting material. The fluorescent light-emitting material may be a repeat unit of a light-emitting polymer, and the first and second triplet-accepting materials may independently be repeat units of the light-emitting polymer or may be mixed with the fluorescent light-emitting material.

A light-emitting composition comprising a mixture of a fluorescent light-emitting material a triplet-accepting copolymer comprising a triplet-accepting repeat unit and a repeat unit of formula (I): ##STR00001##
wherein A is a divalent group; R.sup.1 independently in each occurrence is a substituent; R.sup.2 in each occurrence is H or a substituent; and x independently in each occurrence is 0, 1, 2 or 3.

The present invention is generally related to various types of compositions that comprise a polyindane resin. In particular, the polyindane resins may be utilized in various polymer-based and elastomer-based formulations in order to enhance several properties and characteristics of those formulations. More specifically, adhesive formulations are provided that comprise at least one polyindane resin, which may be used to replace or enhance the functionality of existing hydrocarbon resins typically used in adhesive formulations. Compositions comprising at least one thermoplastic elastomer and at least one polyindane resin are also provided.

The present invention relates to an organic composition which comprises a conjugated polymer as hole-transport compound and a doping compound. The present invention furthermore relates to the use of the composition according to the invention in organic electroluminescent devices, in particular in the so-called buffer layer of such devices. The present invention also relates to a formulation which comprises the composition according to the invention and a solvent and to an organic electroluminescent device which comprises the composition according to the invention.

A high-molecular compound including a group indicated by general formula (11) as a repeating unit. ##STR00001##
In formula (11) n1 indicates an integer of 1-3. Ar.sup.1 indicates an arylene group, a divalent aromatic heterocyclic group, or a divalent aromatic amine residue, and these groups may have a substituent group. If there is a plurality of Ar.sup.1, the Ar.sup.1 can be the same or can be different. R.sup.11 indicates a hydrogen atom, an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, or an aralkyl group, and said groups may have a substituent group. The plurality of R.sup.11 can be the same or can be different. However, at least three of the R.sup.11 are an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, or an aralkyl group.

The present invention describes an oligomer for use as a UV stabiliser. In particular, the oligomer is suitable for use as a UV stabiliser in a polymer matrix. The present invention also describes a method of forming said oligomer. The method of forming said oligomer comprises a polymerising step, wherein the polymerising step comprises forming a CC bond on the hydroxyphenyl ring of a monomer. In preferred embodiments, the oligomer is formed from polymerizing bio-derived monomer such as curcumin, its hydrogenated analogue, and an aldol condensation product of cyclic ketone and vanillin.

An organic film transistor containing a compound, which is composed of n repeating units represented by Formula (1-1), (1-2), or (101), in a semiconductor active layer is an organic film transistor using a compound that results in high carrier mobility when being used in the semiconductor active layer of the organic film transistor and exhibits high solubility in an organic solvent; ##STR00001## (Each of R.sup.1 R.sup.2 represents a hydrogen atom or a substituent; each of Ar.sup.1 and Ar.sup.2 independently represents a heteroarylene group or an arylene group; V.sup.1 represents a divalent linking group; m represents an integer of 0 to 6; cy represents a naphthalene ring or an anthracene ring; each of R.sup.3 and R.sup.4 represents a hydrogen atom or a substituent; each of Ar.sup.3 and Ar.sup.4 represents a heterocyclic aromatic ring or an aromatic ring; V.sup.2 represents a divalent linking group; p represents an integer of 0 to 6; n represents an integer of equal to or greater than 2; A is a divalent linking group represented by Formula (101); each of R.sup.A1 to R.sup.A6 represents a hydrogen atom, a substituent, or a direct bond with Ar.sup.101 or Ar.sup.102 in Formula (101); and among the groups represented by R.sup.A1 to R.sup.A6, two different groups are direct bonds with Ar.sup.101 and Ar.sup.102 in Formula (101) respectively.)

The present invention relates to a mixture comprising a) a polymer which contains at least one L=X structural unit, b) a triplet emitter compound and c) a carbazole compound or a soluble neutral molecule. The invention furthermore relates to organic electroluminescent devices which contain the mixture according to the invention.

A composition comprising: a light emitting material; and a polymer compound having a constitutional sequence represented by the following formula (1) as a main chain:
-[(Y).sub.nZ].sub.m-(1) in the formula, Y represents a divalent group, in which two hydrogen atoms are removed from a structure represented by the following formula (Y-1) or (Y-2), Z represents a divalent group, in which two hydrogen atoms are removed from a structure represented by the following formula (Z-1), (Z-2), (Z-3), (Z-4), (Z-5), (Z-6), (Z-7), or (Z-8), m represents an integer of 4 to 10,000, and n represents an integer of 1 to 3.