The present disclosure provides a method for preparing a deuterated organic compound in good yield even though a reduced amount of benzene-D6 is used by using a solvent comprising a benzene-based compound not substituted with deuterium or partially substituted with deuterium.

An organic electroluminescence device including: a cathode; an anode; and at least one emitting layer disposed between the cathode and the anode, wherein the emitting layer contains a first host material, a second host material, and a dopant material, wherein the first host material is a compound represented by the following formula (1), the second host material is a compound represented by the following formula (2), and the first host material and the second host material are different compounds.

##STR00001##

An organic compound is disclosed comprising: a first chemical moiety with a structure of formula I

##STR00001##

and two second chemical moieties, independently from another with a structure of formula II,

##STR00002##

wherein the first chemical moiety is linked to each of the two second chemical moieties via a single bond.

A fused ring compound and applications thereof in organic electronic components, particularly in organic electroluminescent diodes; an organic electronic component comprising the fused ring compound, and applications thereof in organic electroluminescent diodes and in display and lighting technologies; and a formulation comprising the fused ring compound, and applications thereof in the preparation of organic electronic components. By optimizing the component structure, good component performance can be achieved, and especially, a high-performance OLED component can be implemented, which provide good material and preparation technology choices for full-color display and lighting applications.

An organic electroluminescence device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode. The emitting layer comprises a delayed fluorescent compound M2 having at least one deuterium atom and a compound M3 having at least one deuterium atom. A singlet energy S.sub.1(M2) of the compound M2 and a singlet energy S.sub.1(M3) of the compound M3 satisfy the relationship S.sub.1(M3)>S.sub.1(M2).

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, as a first host material, a first compound that has at least one group represented by a formula (11) below and that is represented by a formula (1) below, the second emitting layer contains, as a second host material, a second compound represented by one of formulae (2-1A) to (2-4A) below, and the first emitting layer and the second emitting layer are in direct contact with each other.

##STR00001## ##STR00002##

The present invention provides a novel method for the preparation of .sup.18F-fluoride (.sup.18F) for use in radiofluorination reactions. The method of the invention finds use especially in the preparation of .sup.18F-labelled positron emission tomography (PET) tracers. The method of the invention is particularly advantageous where bulk solutions are prepared and stored in prefilled vials rather than being freshly prepared on the day of synthesis. Also provided by the present invention is a radiofluorination reaction which comprises the method of the invention, as well as a cassette for use in carrying out the method of the invention and/or the radiofluorination method of the invention on an automated radiosynthesis apparatus.

Described are methods for preparing a deuterated aldehyde using N-heterocyclic carbene catalysts in a solvent comprising D.sub.2O. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions without functionality manipulation.

This method for producing an aromatic astatine compound comprises reacting an aromatic iodonium ylide with astatine to produce an aromatic astatine compound.

Compounds of Formula (Ia)

##STR00001##

wherein R is a C.sub.6-C.sub.12 substituted or unsubstituted aryl, a C.sub.6-C.sub.12 substituted or unsubstituted heteroaryl, a C.sub.1-C.sub.6 substituted or unsubstituted alkyl or —NR′R′, Q is C(O), O, NR′, S, S(O).sub.2, C(O).sub.2 (CH2)p Y is C(O), O, NR′, S, S(O).sub.2, C(O).sub.2, (CH2)p Z is H or C.sub.1-C.sub.4 alkyl, R′ is H, C(O), S(O).sub.2, C(O).sub.2, a C.sub.6-C.sub.12 substituted or unsubstituted aryl, a C.sub.6-C.sub.12 substituted or unsubstituted heteroaryl or a C.sub.1-C.sub.6 substituted of unsubstituted when substituted, aryl, heteroaryl and alkyl are substituted with halogen, C.sub.6-C.sub.12 heteroaryl, —NR′R′ or COOZ, which have diagnostic and therapeutic properties, such as the treatment and management of prostate cancer and other diseases related to NAALADase inhibition, Radiolabels can be incorporated into the structure through a variety of prosthetic, groups attached at the X amino acid side chain via a carbon or hetero atom linkage.