Synthesis of covalent organic frameworks <i>via in situ</i> salen skeleton formation for catalytic applications
作者:He Li、Xiao Feng、Pengpeng Shao、Jian Chen、Chunzhi Li、Sanjeevi Jayakumar、Qihua Yang
DOI:10.1039/c8ta11058a
日期:——
Covalent organic frameworks (COFs) with highly ordered crystalline structures and uniform microenvironments have potential applications in the field of catalysis; however, their application is restricted by their harsh synthesis conditions and multi-step synthetic procedures. Herein, we report the facilesynthesis of a new COF-salen via in situ salen skeleton formation by heating aldehyde and amine precursors
Oxidative Desulfurization of Dibenzothiophene Using Cobalt (II) Complexes with Substituted Salen-Type Ligands as Catalysts in Model Fuel Oil
作者:Deependra Tripathi、Raj K. Singh
DOI:10.1007/s10562-020-03343-4
日期:2021.3
three complexes were studied as oxidative desulfurization catalyst on dibenzothiophene taken in model fuel oil n-dodecane. The acetonitrile used as an extracting solvent and H2O2 as an oxidant. Comparatively CoL3 proved to be the best catalyst which showed the 76% DBT removal at the optimized conditions. The nth-order kinetic model is the best way to represent oxidation kinetics of complexes. This cobalt(II)
Stereoselective syntheses of terpenoids in a more efficient manner have been a long-term pursuit for synthetic chemists. Herein we describe the two-step, enantiospecific and protecting-group-free synthesis of (+)-schisanwilsonene A from a carotane compound, which was produced in E. coli. We also completed the first enantiomeric synthesis of (+)-tormesol in five steps. The two-stage strategy offers
OXYGENATION OF COBALT(II) SCHIFF BASE COMPLEXES IN ALCOHOLS
作者:Akira Nishinaga、Toshiyuki Kondo、Teruo Matsuura
DOI:10.1246/cl.1985.905
日期:1985.7.5
The oxygenation of cobalt(II) Schiffbasecomplexes in alcohols resulted in irreversible oxidation to give the corresponding alcoholatocobalt(III) complexes, which were converted to hydroxocobalt(III) species By treatment with water. Kinetic studies on the oxidation suggest a mechanism involving rate determining proton transfer from alcohols to cobalt-dioxygen adducts.
钴 (II) 席夫碱配合物在醇中的氧化导致不可逆氧化,得到相应的醇钴 (III) 配合物,通过用水处理将其转化为羟基钴 (III) 物质。对氧化的动力学研究表明一种机制涉及决定质子从醇转移到钴-双氧加合物的速率。