5122-94-1Relevant articles and documents
Emission enhancement by formation of aggregates in hybrid chromophoric surfactant amphiphile/silica nanocomposites
Bhongale, Chetan Jagdish,Hsu, Chain-Shu
, p. 1404 - 1408 (2006)
(Figure Presented) In best order: Nanoaggregates of chromophores formed in a controlled fashion in self-assembled functional hybrid nanocomposites enhance fluorescence (see scheme). These hybrids minimize the problem of solid-state quenching and are thus applicable in the fabrication of electroluminescence devices.
Nitrogen-containing compound, electronic element, and electronic device
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Paragraph 0157-0159, (2021/01/29)
The invention provides a nitrogen-containing compound shown as a chemical formula 1, an electronic element and an electronic device, and belongs to the technical field of organic materials. The structural formula of the nitrogen-containing compound is shown as a chemical formula 1, wherein Ar1 and Ar2 are selected from substituted or unsubstituted aryl with the carbon atom number of 6-30, substituted or unsubstituted heteroaryl with the carbon atom number of 3-30 and substituted or unsubstituted naphthenic base with the carbon atom number of 3-20; Ar3 is selected from substituted or unsubstituted aryl with the carbon atom number of 6-20 and substituted or unsubstituted heteroaryl with the carbon atom number of 3-20.
Asymmetric 1,4-Addition of Arylboronic Acids to β,γ-Unsaturated α-Ketoesters using Heterogeneous Chiral Metal Nanoparticle Systems
Miyamura, Hiroyuki,Yasukawa, Tomohiro,Zhu, Zhiyuan,Kobayashi, Shū
supporting information, p. 353 - 359 (2019/12/15)
Asymmetric 1,4-addition reactions with β,γ-unsaturated α-ketoesters are valuable because the resulting chiral ketoester compounds can be converted into various useful species that are often used as chiral building blocks in drug and natural product synthesis. However, β,γ-unsaturated α-ketoesters have two reactive points in terms of nucleophilic additions, which will lead to the 1,4-adduct, the 1,2-adduct and to the combined 1,4- and 1,2-adduct. Therefore, controlling this chemoselectivity is an important factor for the development of these transformations. Here, we developed an asymmetric 1,4-addition of aryl boronic acids to β,γ-unsaturated α-ketoesters by using heterogeneous chiral rhodium nanoparticle systems with a chiral diene ligand bearing a secondary amide moiety. The newly developed polydimethylsilane-immobilized rhodium nanoparticle catalysts showed high activity, high chemoselectivity, and excellent enantioselectivity, and this is the first heterogeneous catalytic system for this asymmetric reaction. Metal nanoparticle catalysts were recovered and reused without loss of activity or leaching of metal. (Figure presented.).