64277-87-8Relevant academic research and scientific papers
Organoiridium complex for organic electroluminescent elements
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Page/Page column 22, (2018/02/02)
The present invention provides an organometallic complex having a high quantum efficiency even in a polymer thin film as a emitting material for organic electroluminescent (EL) element. The present invention relates to an organoiridium complex for an organic electroluminescent element represented by the following Formula; wherein a C—N ligand including two atomic groups (A1, A2), and a β-diketone ligand in line symmetry having two tert-butyl-substituted phenyl groups are coordinated with an iridium atom. The organoiridium complex of the present invention has a high quantum efficiency even in a polymer thin film with respect to green to yellow electroluminescence. (In the aforementioned Formula, R1, R2, and R3 are each a tert-butyl group or a hydrogen atom, and have at least one tert-butyl group; they may bond each other to thereby form a saturated hydrocarbon ring, when having two tert-butyl groups; A1, A2 are each an unsaturated hydrocarbon ring, at least one is a single ring, and at least one is a heterocyclic ring).
ORGANIC IRIDIUM COMPLEX FOR ORGANIC ELECTROLUMINESCENCE ELEMENT
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Paragraph 0035, (2016/12/01)
A metallo-organic complex, which can realize an electroluminescence of high quantum efficiency and has high heat resistance as a luminescence material for an organic electroluminescence (EL) element. More particularly, an organic iridium complex for an organic EL element, wherein a C-N ligand having a substituent group of three-ring structure in which a hetero ring and two benzene rings are ring-fused and a β-diketone ligand including a propane-1,3-dione having two tert-butyl-substituted phenyl groups are coordinated with an indium atom. The present complex has a high heat resistance enough to contribute to increase in long service life of an organic EL element
Size-Selective Yolk-Shell Nanoreactors with Nanometer-Thin Porous Polymer Shells
Jia, Ying,Shmakov, Sergey N.,Register, Paul,Pinkhassik, Eugene
supporting information, p. 12709 - 12714 (2015/09/01)
Yolk-shell nanoreactors with metal nanoparticle core and ultrathin porous polymer shells are effective catalysts for heterogeneous reactions. Polymer shells provide size-selectivity and improved reusability of catalyst. Nanocapsules with single-nanometer porous shells are prepared by vesiclelated directed assembly. Metal nanoparticles are formed either by selective initiation in pre-fabricated nanocapsules or simultaneously with the creation of a crosslinked polymer shell. In this study, we investigated the oxidation of benzyl alcohol and benzaldehyde catalyzed by gold nanoparticles and hydrogenation of cyclohexene catalyzed by platinum nanoparticles. Comparison of newly created nanoreactors with commercially available nanoparticles revealed superior reusability and size selectivity in nanoreactors while showing no negative effect on reaction kinetics.
Substrate size-selective catalysis with zeolite-encapsulated gold nanoparticles
Laursen, Anders B.,Hojholt, Karen T.,Lundegaard, Lars F.,Simonsen, Soren B.,Helveg, Stig,Schueth, Ferdi,Paul, Michael,Grunwaldt, Jan-Dierk,Kegns, Soren,Christensen, Claus H.,Egeblad, Kresten
supporting information; experimental part, p. 3504 - 3507 (2010/08/05)
The Dark Crystal: A hybrid material is reported that is comprised of 1-2 nm sized gold nanoparticles, accessible only through zeolite micropores in a silicalite-1 crystal, as shown by three-dimensional TEM tomography (see picture). Calcination experiments indicate that the embedded nanoparticles are highly stable towards sintering. Figure Equation Present.
High comonomer selectivity in ethylene/hexene copolymerization by unbridged indenyl metallocenes
Dankova, Michaela,Waymouth, Robert M.
, p. 3815 - 3820 (2007/10/03)
Catalysts derived from unbridged 2-arylindene metallocenes of Hf and Zr are active for ethylene/hexene copolymerization and show a much higher selectivity toward hexene than unsubstituted bis(indenyl) metallocenes. The ligand substitution pattern and the
Control of sequence distribution of ethylene copolymers: Influence of comonomer sequence on the melting behavior of ethylene copolymers
Hung, Joyce,Cole, Adam P.,Waymouth, Robert M.
, p. 2454 - 2463 (2007/10/03)
New unbridged mixed-ligand zirconocenes were synthesized, characterized, and studied in the copolymerizations of ethylene-propylene (EP) and ethylene - 1-hexene (EH). The MAO-activated metallocene [1-benzyl-2-(3′,5′-di-tert-butyl)phenylindenyl][2-phenylin
DERIVATIVES OF AROMATIC CYCLIC ALKYLETHERS
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, (2008/06/13)
The present invention provides compounds of the formula: and the pharmaceutically acceptable salts thereof, wherein: R1 and R2 are each alkyl; n is an integer of from 1 to 4; x is oxygen or -(CH2)m-; m is an integer of from 1 to 3; y is oxygen or sulfur; and p is an integer of from 1 to 4. These compounds are inhibitors of COX-I and/or COX-II, and are useful for the treatment of inflammation-associated disorders. The present invention also provides pharmaceutical compositions comprising a therapeutically-effective amount of a compound of Formula I in combination with a pharmaceutically-acceptable carrier, and a method for treating inflammation-associated disorders in an animal comprising administering a therapeutically-effective amount of a compound of Formula I to the animal
The 1-(3,5-Di-tert-butylphenyl)-1-methylethoxycarbonyl (t-Bumeoc) Residue, a Protecting Group Cleavable under Extremely Mild Acidic Conditions
Voelter, Wolfgang,Mueller, Juergen
, p. 248 - 260 (2007/10/02)
The synthesis of 1-(3,5-di-tert-butylphenyl)-1-methylethoxycarbonyl fluoride (8) and its reaction with selected amino acids as well as the 13C NMR spectroscopic characterization of t-Bumeoc derivatives are described.The new protecting group is cleavable under very mild acidic conditions.The kinetics of the cleavage is studied by high-performance liquid chromatography (HPLC).The utility of the t-Bumeoc compared to the Adpoc protecting group is demonstrated taking a derivative of the molluscan neuropeptide as an example.
