278-74-0Relevant articles and documents
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.
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Rebek,Mc Cready
, p. 1001 (1979)
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Bartlett et al.
, p. 2983 (1978)
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
Air oxidation of a five-coordinate Mn(III) dimer to a high-valent oxomanganese(V) complex
MacDonnell, Frederick M.,Fackler, Nathanael L. P.,Stern, Charlotte,O'Halloran, Thomas V.
, p. 7431 - 7432 (1994)
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Metalloporphyrin-Catalyzed Cooxidation of Olefin in the Singlet Oxygenation of Sulfide
Akasaka, Takeshi,Haranaka, Masayuki,Ando, Wataru
, p. 9898 - 9900 (1991)
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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.
Zefirov et al.
, p. 949 (1979)
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Brown et al.
, p. 6914,6917 (1970)
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Jefford,C.W.,Boschung,A.F.
, p. 2242 - 2257 (1974)
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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.
A novel magnesium oxide supported polytitazane-tin tetrachloride catalyst for aerobic epoxidation of cycloalkenes under mild conditions
Wang, Tie-Jun,Ma, Zhao-Hui,Yan, Yuan-Yong,Huang, Mei-Yu,Jiang, Ying-Yan
, p. 1355 - 1356 (1996)
A magnesium oxide supported polytitazane-tin tetrachloride complex is found to be a novel efficient catalyst for epoxidation of cycloalkenes with molecular oxygen with 1,4-dioxane as a co-reductant under mild conditions.
Formation of β-Ga2O3nanorings from metal-organic frameworks and their high catalytic activity for epoxidation of alkenes
Wang, Wei Ping,Song, Le Xin,Li, Yao,Teng, Yue,Xia, Juan,Wang, Fang,Liu, Nan Ning
, p. 349 - 357 (2021/01/14)
Here we report a novel synthesis of hollow high-quality β-Ga2O3 nanorings based on an interesting structural evolution from concave Ga-MOF nanodisks. The concave low-crystallinity nanodisks were constructed by non-classical crystallization with particle a
A sustainable approach towards solventless organic oxidations catalyzed by polymer immobilized Nb(V)-peroxido compounds with H2O2 as oxidant
Ahmed, Kabirun,Gogoi, Sandhya Rani,Islam, Nashreen S.,Saikia, Gangutri,Sultana, Sazida Yasmin,Talukdar, Hiya
, (2021/11/16)
New heterogeneous catalysts comprising of peroxidoniobium(V) complexes immobilized on amino acid grafted cross-linked poly(styrene-divinylbenzene) resin has been developed. Results of FTIR, Raman, NMR, XPS, XRD, EDX, SEM, BET, TGA, and elemental analysis confirmed the successful anchoring of triperoxidoniobium(V), [Nb(O2)3]? species to the host polymer via the pendant amino acid groups. The supported catalysts exhibited excellent performance in epoxidation of styrene and a range of cyclic and terpenic compounds under environmentally acceptable solvent-free condition, with aqueous H2O2 as oxidant. The catalytic protocols provided excellent conversion to the desired epoxide (up to 100%) with selectivity > 99%, TON as high as 1000, and high H2O2 utilization efficiency (92–97%). Moreover, the catalysts efficiently facilitated chemoselective solvent-free oxidation of a variety of thioethers to sulfones at room temperature. Simple operational strategy, easy recyclability for multiple reaction cycles with the consistent activity-selectivity profile are the additional significant attributes of the developed catalytic processes.