The present invention relates to indane derivatives of the formula (I) and mixtures thereof, wherein X is selected from groups of the formula -A-(NAr.sub.2), wherein A is a chemical bond or phenylene which is unsubstituted or substituted by 1, 2 or 3 substituents selected from C.sub.1-C.sub.6-alkyl and C.sub.1-C.sub.6-alkoxy; Ar is unsubstituted or substituted aryl, wherein two groups Ar bound to the same nitrogen atom may together with the nitrogen atom also form a fused ring system having 3 or more than 3 unsubstituted or substituted rings; and the variables Y, n, m, k and l are as defined in the claims and the description. The invention further relates to methods for preparing such compounds and their use in organic electronics, in particular as hole transport material or electron blocking material. ##STR00001##

The invention relates to a hydrogel product comprising glycosaminoglycan molecules as the swellable polymer, wherein the glycosaminoglycan molecules are covalently crosslinked via crosslinks comprising a spacer group selected from the group consisting of di-, tri-, tetra-, and oligosaccharides.

Provided are a nitrogen-containing compound, an electronic element, and an electronic device, and the present disclosure belongs to the technical field of organic materials. The structure of the nitrogen-containing compound is as shown in chemical formula (1); and the nitrogen-containing compound can improve the properties of an electronic element.

##STR00001##

The present specification relates to a fluorene-based compound of Chemical Formula 1, a coating composition including the fluorene-based compound of Chemical Formula 1, an organic light emitting device using the same, and a manufacturing method thereof

##STR00001##

wherein X1 to X4, L1, L2, R1 to R6, Ar1, Ar2, m1, m2, and n1 to n6 are described herein.

The resin composition of the present disclosure contains a fluorene derivative represented by the following formula (1) and a polyamide-series resin:

##STR00001##

Wherein R.sup.1 represents a substituent, k denotes an integer of 0 to 8, R.sup.2a, R.sup.2b, R.sup.2c, and R.sup.2d each represent a hydrogen atom or a substituent, R.sup.3a and R.sup.3b each represent a hydrogen atom or a substituent, and X.sup.1a and X.sup.1b each represent a group defined in the following formula (X1):

##STR00002##

wherein R.sup.4 and R.sup.5 each represent a hydrogen atom or a hydrocarbon group; or R.sup.4 and R.sup.5 bend together to form a heterocyclic ring containing the nitrogen atom adjacent to R.sup.4 and R.sup.5.

The resin composition has an excellent fluidity.

The fluorene derivative of the present disclosure is represented by the following formula (1):

##STR00001##

Wherein R.sup.1 represents a substituent, k denotes an integer of 0 to 8, R.sup.2a, R.sup.2b, R.sup.2c, and R.sup.2d each represent a hydrogen atom or a substituent, R.sup.3a and R.sup.3b each represent a hydrogen atom or a substituent, and X.sup.1a and X.sup.1b each represent a group defined in the following formula (X1):

##STR00002##

wherein R.sup.4 and R.sup.5 each represent a hydrogen atom or an aliphatic hydrocarbon group, provided that the case where both R.sup.4 and R.sup.5 are a hydrogen atom is excluded; or R.sup.4 and R.sup.5 bond together to form a heterocyclic ring containing the nitrogen atom adjacent to R.sup.4 and R.sup.5. The present disclosure provides a novel fluorene derivative useful as an additive for improving the properties of a resin, a method for producing the same and a use thereof.

Provided is a compound of Formula 1: ##STR00001##
and an organic light emitting device including the same.

An organic EL device includes a first emitting layer and a second emitting layer, in which the first emitting layer contains a first host material, the second emitting layer contains a second host material, the first and the second host material are mutually different, the first emitting layer and the second emitting layer at least contains a compound that emits fluorescence having a main peak wavelength of 500 nm or less, respectively, the compound contained in the first emitting layer and that emits fluorescence having a main peak wavelength of 500 nm or less is the same as or different from the compound contained in the second emitting layer, and a triplet energy T.sub.1(H1) of the first host material and a triplet energy T.sub.1(H2) of the second host material satisfy a numerical formula (Numerical Formula 1),

T.sub.1(H1)>T.sub.1(H2)  (Numerical Formula 1).

An organic electroluminescence device includes an anode, a cathode, a first emitting layer, and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer includes, as a first host material, a first compound that includes at least one group represented by a formula (11) below, the first compound being represented by a formula (1) below, the second emitting layer includes a second compound represented by a formula (2A) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer.

##STR00001##

The di(meth)acrylate compound of the present disclosure is represented by the following formula (1):

##STR00001##

wherein Z.sup.1a and Z.sup.1b each represent an arene ring, R.sup.1a and R.sup.1b each represent a substituent, k1 and k2 each denote an integer of not less than 0, m1 and m2 each denote an integer of 0 to 4, and at least one of m1 and m2 denotes 1 or more, R.sup.2a and R.sup.2b each represent a substituent, n1 and n2 each denote an integer of 0 to 4, m1+n1 and m2+n2 each denote 4 or less, A.sup.1a and A.sup.1b each represent a straight- or branched-chain alkylene group, A.sup.2a and A.sup.2b each represent a straight- or branched-chain alkylene group, p1 and p2 each denote an integer of not less than 0, and R.sup.3a and R.sup.3b each represent a hydrogen atom or a methyl group.

The di(meth)acrylate compound is a novel compound having a high refractive index.