[EN] NEW POLYMERIZABLE LIQUID CRYSTAL HAVING A CARBAZOLE CORE<br/>[FR] NOUVEAU CRISTAL LIQUIDE POLYMÉRISABLE AYANT UN COEUR CARBAZOLE
申请人:ROLIC TECH AG
公开号:WO2020260617A1
公开(公告)日:2020-12-30
The invention relates to novel anisotropic compounds of formula (I) as well as to liquid crystalline mixtures, films and electro-optical devices comprising the compound.
该发明涉及公式(I)的新型各向异性化合物,以及包含该化合物的液晶混合物、薄膜和电光器件。
Novel cyclodextrin-modified h-BN@Pd(II) nanomaterial: An efficient and recoverable catalyst for ligand-free C-C cross-coupling reactions in water
An environmentally friendly palladium(II) catalyst supported on cyclodextrin‐modified h‐BN was successfully prepared. The catalyst was characterized by FT‐IR, SEM, TG, XRD and XPS, and the loading level of Pd in h‐BN@β‐CD@Pd(II) was measured to be 0.088 mmol g−1 by ICP. It exhibits excellent catalytic activity for the Suzuki and Heck reactions in water, and can be easily separated and consecutively
已成功制备了负载在环糊精修饰的h-BN上的环保钯(II)催化剂。通过FT-IR,SEM,TG,XRD和XPS对催化剂进行了表征,ICP测得h-BN @β-CD@ Pd(II)中Pd的负载量为0.088 mmol g -1。它对水中的Suzuki和Heck反应具有出色的催化活性,并且可以轻松分离并连续重复使用至少9次。此外,使用该催化剂成功合成了一系列药理学有趣的产品,以证明其在制药工业中的潜在应用。最重要的是,这项工作为使用环糊精官能化的h-BN作为亲水性非均相催化剂的有效载体开辟了一条有趣的诱人途径。
Ligand-Free C-C Coupling Reactions Promoted by Hexagonal Boron Nitride-Supported Palladium(II) Catalyst in Water
exhibited excellent catalytic activities in the Suzuki and Heck reactions. Moreover, the catalyst could be easily recovered by simple filtration and reused at least ten times without significant loss of its catalytic activity. In general, this work demonstrates the possibility of using Schiff‐base@hexagonal boronnitride as an efficient support for heterogeneous catalysts.
Enhancing catalytic activity towards Heck-reaction by using 4,5,9,10-tetra(arylimino)pyrenylidenyldipalladium tetrachlorides
作者:Tong Zhao、Qifeng Xing、Kuifeng Song、Qing Ban、Tongling Liang、Qingbin Liu、Wen-Hua Sun
DOI:10.1039/c4ra16193a
日期:——
A series of binuclear 4,5,9,10-tetra(arylimino)pyrenylidenyldipalladium(ii) tetrachloride complexes (Pd1–Pd4) was synthesized and characterized by FT-IR and NMR spectroscopy as well as elemental analysis.
Copper(ii) oxide on aluminosilicate mediated Heck coupling of styrene with aryl halides in water
作者:S. Ganesh Babu、N. Neelakandeswari、N. Dharmaraj、S. David Jackson、R. Karvembu
DOI:10.1039/c3ra23246h
日期:——
CuO/aluminosilicate has been found to be an efficient catalyst for the aqueous Heck coupling of styrene with aryl halides under ligand free conditions. The catalyst (CuO/aluminosilicate) was prepared from CuCl2·6H2O, aluminium nitrate and tetraethyl orthosilicate (TEOS) and characterized by XRD, HR-TEM, SEM-EDX and XPS. The reaction conditions were optimized with different solvents, bases, catalyst