3365-85-3Relevant articles and documents
Suzuki cross-coupling method to prepare 4,4″-diamino-p-terphenyl
Davis, Matthew C.
, p. 1343 - 1346 (2006)
The synthesis of 4,4″-dinitro-p-terphenyl is accomplished by double Suzuki cross-coupling. The product was reduced catalytically to give 4,4″-diamino-p-terphenyl in 75% overall yield. Copyright Taylor & Francis Group, LLC.
DIAMINE COMPOUND, AND POLYIMIDE PRECURSOR AND POLYIMIDE FILM PREPARED BY USING THE SAME
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, (2020/11/03)
The present invention disclosed a novel diamine compound including a structure in which a phenylene linker (L) connecting an intramolecular imide ring and the imide ring is bonded to a phenyl ring substituted with -NH-(C=O)- or -O-(C=O)-. A polyimide film prepared by polymerizing the novel diamine compound has not only improved mechanical and thermal properties, but also an excellent refractive index.COPYRIGHT KIPO 2021
DIAMINE COMPOUND, POLYIMIDE PRECURSOR AND POLYIMIDE FILM PREPARED BY USING SAME
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, (2020/09/26)
The present invention discloses a novel diamine having a structure including an intramolecular imide group while having an aromatic ring group with a rigid structure. In addition, and by comprising the novel diamine as a polymerization component, the present invention can provide a polyimide film having improved mechanical and thermal properties while maintaining optical properties of polyimide.
Identification of Prime Factors to Maximize the Photocatalytic Hydrogen Evolution of Covalent Organic Frameworks
Abe, Ryu,Baburin, Igor,Ghosh, Samrat,Heine, Thomas,Kaji, Hironori,Kawaguchi, Takahiro,Kuc, Agnieszka,Nakada, Akinobu,Seki, Shu,Springer, Maximilian A.,Suzuki, Hajime,Suzuki, Katsuaki
supporting information, p. 9752 - 9762 (2020/07/25)
Visible-light-driven hydrogen (H2) production from water is a promising strategy to convert and store solar energy as chemical energy. Covalent organic frameworks (COFs) are front runners among different classes of organic photocatalysts. The photocatalytic activity of COFs depends on numerous factors such as the electronic band gap, crystallinity, surface area, exciton migration, stability of transient species, charge separation and transport, etc. However, it is challenging to fine tune all of these factors simultaneously to enhance the photocatalytic activity. Hence, in this report, an effort has been made to understand the interplay of these factors and identify the key factors for efficient photocatalytic H2 production through a structure-property-activity relationship. Careful molecular engineering allowed us to optimize all of the above plausible factors impacting the overall catalytic activities of a series of isoreticular COFs. The present study determines three prime factors: light absorption, charge carrier generation, and its transport, which influence the photocatalytic H2 production of COFs to a much greater extent than the other factors.
MECHANICALLY SHAPED 2-DIMENSIONAL COVALENT ORGANIC FRAMEWORKS
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, (2018/02/28)
Covalent organic frameworks (COFs) usually crystallize as insoluble powders and their processing for suitable devices has been thought to be limited. Here, it is demonstrated that COFs can be mechanically pressed into shaped objects having anisotropic ordering with preferred orientation between the hk0 and 00/ crystallographic planes. Pellets prepared from bulk COF powders impregnated with LiC1O4 displayed room temperature conductivity up to 0.26 mS cm-1 and stability up to 10.0 V (vs. Li+/Li0). This outcome portends use of COFs as solid-state electrolytes in batteries.
Framework: Vs. side-chain amphidynamic behaviour in oligo-(ethylene oxide) functionalised covalent-organic frameworks
Vazquez-Molina, Demetrius A.,Pope, Giovanna M.,Ezazi, Andrew A.,Mendoza-Cortes, Jose L.,Harper, James K.,Uribe-Romo, Fernando J.
, p. 6947 - 6950 (2018/06/26)
We present a family of covalent organic frameworks that have been functionalized with oligo-(ethylene oxide) chains of varying lengths. Because of the open structure of the COFs, the side chains do not interfere with their crystallization obtaining materials with predictable crystal structure. The difference in length of the side-chains allowed for the determination of amphidynamic behaviour with the use of 13C solid-state NMR relaxation methods. Computational calculations further contribute to understanding the atomistic dynamic behaviour of the different atoms. This study demonstrates the ability to design complex behaviour in organic crystals.
Transformative binding and release of gold guests from a self-assembled Cu8L4 tube
Meng, Wenjing,Clegg, Jack K.,Nitschke, Jonathan R.
, p. 1881 - 1884 (2012/03/26)
Totally tubular: A linear M8L48+ receptor, which binds tightly and selectively to the dicyanoaurate anion, was assembled from simple organic subcomponents and copper(I) ions. The guest complex is not bound unchanged, but instead is transformed into a longer linear complex where two dicyanogold units are bridged by a central cation of copper/silver (see scheme). This complex optimally fills the cavity of the receptor but is not observed in the absence of the host.
Nondepolarizing muscle relaxant
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, (2008/06/13)
A nondepolarizing muscle relaxant containing, as active principle ingredient, p,p"-bis-triethylammonio-n-terphenyl dibenzenesulphonate in a pharmaceutical carrier is described. The proposed preparation is used as a 0.5 per cent aqueous solution. Said muscle relaxant possesses high potency and selectivity. When given in a myoparalytic dose, it does not affect the arterial pressure. The preparation is nontoxic, its effect is quickly and fully removed by cholinesterase inhibitors, which ensures higher safety and better control of muscle relaxation compared with the action of the known muscle relaxants α-tubocurarin and pancuronium.