278-74-0Relevant academic research and scientific papers
Fabrication of hierarchical composite microspheres of copper-doped Fe3O4@P4VP@ZIF-8 and their application in aerobic oxidation
Hou, Junying,Luan, Yi,Yu, Jie,Qi, Yue,Wang, Ge,Lu, Yunfeng
, p. 10127 - 10135 (2016)
Novel hierarchical magnetic composite microspheres of copper-doped Fe3O4@poly(4-vinylpyridine-co-divinylbenzene)@ZIF-8 (Cu-FPZ, Cu stands for copper doped) were successfully fabricated. The core-shell Fe3O4(PAA)@P4VP magnetic microspheres were first synthesized by a polymerization approach, in which the 4-vinylpyridine (4-VP) monomer interacted with a-COOH group of poly(acrylic acid) modified Fe3O4 by means of a hydrogen-bond interaction. Then Zn2+ was adsorbed on the surface of the P4VP shell, followed by the formation of a ZIF-8 porous shell with 2-methylimidazolate. Finally, nearly 5.45 wt% of copper content was incorporated with the ZIF-8 framework to form a magnetic core-shell copper-doped Fe3O4@P4VP@ZIF-8. The obtained copper-doped Fe3O4@P4VP@ZIF-8 catalyst was applied in the selective oxidation of alcohols and epoxidation of olefins using molecular oxygen as the oxidant. The results demonstrated that the magnetic core-shell copper-doped Fe3O4@P4VP@ZIF-8 catalyst showed better catalytic activity with significantly improved turnover number and turnover frequency (up to 8.25 h-1) than other copper MOFs. Furthermore, this heterogeneous catalyst could be cycled at least 15 times without significant loss of activity.
Binuclear molybdenum Schiff-base complex: An efficient catalyst for the epoxidation of alkenes
Guo, Yingxiong,Xiao, Longqiang,Li, Pan,Zou, Wenhong,Zhang, Wenzhe,Hou, Linxi
, (2019)
Dimolybdenum Schiff-base complex (DMSBC) which contain O,N-bidentate ligand was synthesized and characterized. The complex can be used as a promising catalyst in the epoxidation of olefins with tert-butyl-hydroperoxide (TBHP) as oxidant. The catalytic activity of the DMSBC was optimized by adjusting various parameters. Epoxidation of olefins by DMSBC indicated that the catalyst exhibited superb catalytic activity with high conversions up to 99.6%, high selectivity up to 100%, and high turnover frequency (TOF) of 208 h?1. Kinetic analysis provided that epoxidation of cyclooctene by DMSBC possessed moderate activation energy (95.3 ± 2 kJ·mol?1). Furthermore, the calculated pre-exponential factor (A) proved that strong collisions probability take place in the reaction. Additionally, the recycle experiments demonstrated that DMSBC could be recovered and repeatedly applied.
Catalytic hydrocarbon oxygenation by a dinuclear ruthenium(II) complex with molecular oxygen
Kojima, Takahiko,Matsuda, Yoshihisa
, p. 81 - 82 (1999)
A bis-μ-chloro Ru(II) dimer with tris(2-pyridylmethyl)amine (TPA) exhibited catalytic oxygenation of alkenes and cooxygenation of alkanes in the presence of cyclohexene with molecular oxygen (latm) at room temperature without reducing reagents; reactions proceeded via a radical chain mechanism as a main pathway.
Hydrogen-bond-supported 3D networks: Two different polymeric structures featuring chlorine atoms as ligands and as anions and investigations as epoxide catalysts
Luan, Yi,Wang, Ge,Luck, Rudy L.,Wang, Yingnan,Xiao, Han,Ding, Hangjun
, p. 1144 - 1145 (2008)
Two novel hydrogen-bonded network polymers, [MoO2Cl 2-(H2O)2]2[4,4′-H 2bipy]2+·2Cl- (1) and [MoO 2Cl4]2-[4,4′-H2-bipy] sup
A New Active Intermediate in Monooxygenations Catalyzed by Iron Porphyrin Complexes
Murakami, Tatsuya,Yamaguchi, Kazuya,Watanabe, Yoshihito,Morishima, Isao
, p. 1343 - 1353 (1998)
A new type of high-valent oxoiron porphyrin (3b) has been prepared by the reaction of FeIII(tdcpp) (1b) [tdcpp: 5, 10,15,20-tetrakis(2,6-dichlorophenyl)porphyrin] with an oxidant such as p-nitroperbenzoic acid and pentafluoroiodosylbenzene at -
Epoxidation of Alkenes with Iodosylbenzene catalysed by a Water-soluble Chromium(III) N,N'-Ethylene bis(salicylideneaminato) (salen) Complex using β-Cyclodextrin as a Phase Transfer Agent
Ganeshpure, P. A.,Satish, S.
, p. 981 - 982 (1988)
Addition of β-cyclodextrin as a phase-transfer agent resulted in an increase in yields and rates of epoxidation of alkenes with iodosylbenzene, catalysed by the water soluble complex Cl in water - methylene chloride.
Halogenated tetraphenyl porphyrin; Iodosylbenzene an efficient catalytic system for olefin epoxidation
Aggrawal, Dau D.,Bhat, Daisy
, p. 1123 - 1129 (2015)
Olefin epoxidation using o-phenyl and b-pyrrole substituted tetraphenyl porphyrin complexes of Fe(III) and Mn(III) as catalysts and yIodosylbenzene as oxidant was studied. Excellent yields of epoxide and secondary oxidation products were observed. Effect of pyridine, imadizole, sodium lauryl sulphate, and solvent variation was also studied. Effect of substituents on catalytic activity of the porphyrin complex is also explained. o-phenyl substituted complexes gave better yield of epoxide as compared to b-pyrrole substituted complexes.
Epoxidation of Alkenes Catalyzed by Iron(III) Schiff Base Chelates. A Monooxygenase Model
Jacob, Mathew,Bhattacharya, Pabitra Krishna,Ganeshpure, Pralhad A.,Satish, Sheo,Sivaram, Swaminathan
, p. 1325 - 1327 (1989)
Iron(III) Schiff base chelates Cl2 (1), Cl2 (2), and Cl (3), were synthesized, where (PA2ppd), (PA2mpd), and (PA2opd) are the Schiff bases derived from 2-pyridinecarbaldehyde (PA), and p-phenylenediamine (p
Zirconium containing mesoporous silicas: New catalysts for oxidation reactions in the liquid phase
Tuel,Gontier,Teissier
, p. 651 - 652 (1996)
Zirconium containing mesoporous silicas are synthesized using hexadecylamine as surfactant; the new materials show very interesting properties as catalysts in liquid-phase oxidations with H2O2 and alkyl peroxides.
Effective alkene epoxidation with dilute hydrogen peroxide on amorphous silica-supported titanium catalysts
Capel-Sanchez,Campos-Martin,Fierro,De Frutos,Padilla Polo
, p. 855 - 856 (2000)
The use of amorphous silica-supported titanium catalysts in which the titanium ions display a chemical environment similar to that of Ti- substituted zeolites, afforded excellent activity in the epoxidation of terminal linear and bulky alkenes with dilute solutions of hydrogen peroxide.
