Provided are a photoactive fluorophore, a photoactive ligand, and a photoactive complex. The photoactive fluorophore includes a photoactivatable derivative of an azetidine-containing Janelia-Fluor dye. The photoactive ligand includes a photoactive fluorophore and a protein tag. The photoactive complex includes a photoactive ligand conjugated to a protein. Also provided are methods of in vivo labeling with and photoactivation of the photoactive fluorophore, ligand, and complex.

A new class of compounds known as chalcogenosilacyclopentanes is described. These compounds are five-membered ring structures containing a silicon-selenium or silicon-tellurium bond, as shown in Formulas (I) and (II). In these compounds, the substituents on the silicon and on the ring carbons may be hydrogen, alkyl, alkoxy, aromatic, or ether groups. The chalcogenosilacyclopentane compounds undergo ring-opening reactions with hydroxyl and other protic functionalities and may be used to prepare substrates that are amenable to thin film deposition techniques such as ALD and CVD.

##STR00001##

According to the present invention, options for materials for organic devices such as materials for organic EL elements are increased by addition of a cycloalkane, by condensation, to a polycyclic aromatic compound in which a plurality of aromatic rings are linked together by boron atoms, oxygen atoms, and the like. By using a novel cycloalkane-condensed polycyclic aromatic compound as a material for an organic EL element, for example, an organic EL element having excellent emission efficiency and element life is provided.

Disclosed herein, inter alia, are silicon containing detectable compounds and methods of use thereof. In an aspect is provided a monovalent nucleotide or monovalent nucleoside covalently bound to a monovalent form of a compound described herein (e.g., wherein the R13 moiety of a compound described herein has reacted with a bioconjugate reactive group to form a bioconjugate linker thereby covalently bonding the monovalent compound to the monovalent nucleotide or monovalent nucleoside).

A compound comprising a first ligand L.sub.A of Formula I or Formula II: ##STR00001## wherein A.sup.1 and A.sup.2 are each independently C or Si; wherein each R.sup.A, and R.sup.B independently represents mono to the maximum allowable substitution, or no substitution; wherein each X.sup.1, X.sup.2, and X.sup.3 is independently C or N; wherein each R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.A is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; wherein L.sub.A is complexed to a metal M; wherein M is optionally coordinated to one or more other ligands; wherein the ligand L.sub.A is optionally linked with the one or more other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand; and wherein any two substituents are optionally joined or fused together to form a ring.

An organic electroluminescence device of an embodiment includes a first electrode, a second electrode provided on the first electrode, and a plurality of organic material layers provided between the first electrode and the second electrode, wherein at least one organic material layer among the plurality of organic material layers include a monoamine compound, and the monoamine compound includes a core structure including two condensed rings which are combined to form a spiro structure, where each condensed ring has a condensed structure of three or more pentagonal or hexagonal rings. High emission efficiency may be achieved.

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 contains a first compound represented by a formula (101) below as a first host material, the second emitting layer contains a second compound represented by a formula (2) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer.

##STR00001##

Provided are: an azepan derivative represented by general formula (I) and a pharmaceutically acceptable salt thereof (in the formula: R.sup.1 represents a hydrogen atom, a C.sub.1-6 alkyl group which may have a substituent, etc.; R.sup.2 and R.sup.3 are the same as or different from each other, and represent a hydrogen atom, a C.sub.1-6 alkyl group which may have a substituent, etc.; R.sup.4 and R.sup.5 are the same as or different from each other, and represent a hydrogen atom, a C.sub.1-6 alkyl group which may have a substituent, etc.; R.sup.6 represents a hydrogen atom, a C.sub.1-6 alkyl group which may have a substituent, etc.; R.sup.7 and R.sup.8 are the same as or different from each other, and represent a hydrogen atom, a C.sub.1-6 alkyl group which may have a substituent, etc.; R.sup.9 and R.sup.10 are the same as or different from each other, and represent a hydrogen atom, a C.sub.1-6 alkyl group which may have a substituent, etc.; R.sup.11 represents a hydrogen atom, a C.sub.1-6 alkyl group which may have a substituent, etc.; A and B differently represent a methyl group, a carbonyl group, etc.; and X represents a nitrogen atom or an N-oxide.).

The present invention is to provide a light emitting material, for an organic EL device, exhibiting higher light emitting efficiency, and particularly, to provide a blue light emitting material, wherein the light emitting material comprises a compound of the following General Formula (1):

##STR00001## X is an aryl group including a tertiary amine structure, and Y is a phenyl group having an alkyl or aryl substituent at one ortho position.