In this research, AgBr supported on an ionic gelation-based nanomaterial, was developed through the aqueous coprecipitation approach for the dendritic fibrous nanosilica (DFNS) production.
Bifunctional Silver(I) Complex-Catalyzed CO<sub>2</sub>Conversion at Ambient Conditions: Synthesis of α-Methylene Cyclic Carbonates and Derivatives
作者:Qing-Wen Song、Wei-Qiang Chen、Ran Ma、Ao Yu、Qiu-Yue Li、Yao Chang、Liang-Nian He
DOI:10.1002/cssc.201402921
日期:2015.3
The chemical conversion of CO2 at atmospheric pressure and room temperature remains a great challenge. The triphenylphosphine complex of silver(I) carbonate was proved to be a robust bifunctional catalyst for the carboxylative cyclization of propargylicalcohols and CO2 at ambient conditions leading to the formation of α‐methylene cyclic carbonates in excellent yields. The unprecedented performance
在大气压和室温下,CO 2的化学转化仍然是一个巨大的挑战。事实证明,碳酸银(I)的三苯基膦配合物是一种强大的双功能催化剂,可在环境条件下对炔丙醇和CO 2进行羧化环化反应,从而以极好的收率形成α-亚甲基环状碳酸酯。[(PPh 3)2 Ag] 2 CO 3的空前性能可能归因于CO 2和炔丙醇的同时活化。此外,催化物种的高度相容的碱性使炔丙醇与CO 2反应导致形成关键的烷基碳酸银中间体:较大的[(Ph 3 P)2 Ag I ] +有效激活碳-碳三键并增强烷基碳阴离子的O-亲核性,从而大大促进了分子内亲核环化。值得注意的是,该催化方案也适用于炔丙醇,仲胺和CO 2(在大气压下)反应以生成β-氧代丙基氨基甲酸酯。
Co-immobilization of Laccase and TEMPO onto Glycidyloxypropyl Functionalized Fibrous Phosphosilicate Nanoparticles for Fixing CO2 into β-Oxopropylcarbamatesin
e-1oxyl radical into the nanospaces a fibre of phosphosilicate with laccase compound causes an unheard potent to be producing which called bifunctional nanocatalyst (TEMPO@FPS-laccase). TEMPO@FPS-laccase indicated proper catalytic activity for synthesis of β-oxopropylcarbamates in aqueous medium without any pollutants through a multi component coupling of CO2, amines and propargylalcohols in moderate
magnetic nanoparticles (FeNi3) based palladium NPs with high surface area and easy accessibility of active sites was successfully developed by a facile approach. FeNi3 was functionalized with ionic gelation groups (IG) acting as the robust anchors so that the palladiumnanoparticles were well-dispersed on the FeNi3 (FeNi3/DFNS/IG/Pd), without aggregation. Then, its strength as a nanocatalyst for synthesis
Iron complexes of 1,1′-bis(diphenylphosphino)ferrocene (BPPF) as efficient catalysts in the synthesis of carbamates. X-ray crystal structure of (BPPF)Fe(CO)3
作者:Tae-Jeong Kim、Kee-Ha Kwon、Soon-Chul Kwon、Jin-Ook Baeg、Sang-Chul Shim、Dong-Ho Lee
DOI:10.1016/0022-328x(90)85412-r
日期:1990.6
1,1′-Bis(diphenylphosphino)ferrocene (BPPF) reacts with a 5–10 molar excess of Fe(CO)5 to give three new iron complexes (η2-BPPF)Fe(CO)3 (1), (η1-BPPF)Fe(CO)4 (2), and (μ,η1-BPPF)Fe2(CO)8 (3) with the product distribution depending upon reaction conditions. The structure of 1 has been determined. Crystals are monoclinic, space group P21/c, with a 9.708(1), b 16.195(2), c 19.869(5) Å, β 95.75(2)°, V