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Preparation and catalysis of porous silica supported metal Schiff-base complex
A series of porous silica support metal Schiff-base complexes was synthesized with amino porous silica, salicylaldehyde and metal ion, which characterized by IR spectra, elemental analysis, and SEM. The catalytic property for oxidation of olefins in the presence of molecular oxygen has been investigated. The major product of the aerobic oxidation without reductant was the epoxy. The influence of r...
http://www.polymer.cnt//ss/wangrongmin/publicationsshow_2543.html |
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Recent Progress in the Vinylic Polymerization and Copolymerization of Norbornene Catalyzed by Transition Metal Catalysts.
Here progress in the development of the catalytic addition polymerization and copolymerization of norbornene by various transition-metal complexes is described. A full literature account is given in this review mostly covering the years of 2000 to the early of 2009. The interest in vinyl homo-polynorbornene is driven by its dielectric and mechanical properties for the technical application as an i...
http://www.polymer.cnt//ss/baofeng/publicationsshow_2240.html |
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Effect of metal nanoparticles prepared by a one-step dry process.
Palladium (Pd) nanoparticles were incorporated into free-standing polymer films by a one-step dry process involving simultaneous vaporization, absorption and reduction schemes of palladium(II) bis(acetylacetonate), Pd(acac)2, used as a precursor. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MAS) and Fourier transform infrared spectroscopy (FTIR) analyses ...
http://www.polymer.cnt//ss/ygliao/publicationsshow_1486.html |
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Lanthanide metal amides revisited; the use of the2,2,6,6-tetramethylpiperidinato (TMP) ligand
Group 3 (Y) and 4f (largely Ce) metal(III) amides (largely 2,2,6,6-tetramethylpiperidinates) have been prepared and
structurally characterised: [Y(TMP)3] (1), [Ce(TMP)3(thf)] (2), [Li(thf)4][CeBr(TMP)3] (3), [{Y(TMP)2(m-OEt)}2]
(4), [{Y(TMP)2}2(m-OEt)(m-OBun)] (5), [{Ce(TMP)2(m-OEt)}2] (6) and [LaBr{N(SiMe3)(C6H3Pri
2-2,6)}2(thf)] (10)
[TMP ~ NC(Me)2(CH2)3C(Me)2]. Low yields of crystalline TeC...
http://www.polymer.cnt//ss/huangqigu/publicationsshow_1096.html |
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Highly Active Organic Lewis Pairs for the Copolymerization of Epoxides with Cyclic Anhydrides: Metal-Free Access to Well-Defined Aliphatic Polyesters
关键字：Epoxides with Cyclic Anhydrides，Metal-Free，
Polyester synthesis from the alternating copolymerization of epoxides with cyclic anhydrides via a metal-free route remains a key challenge. This work reports the development of a highly active organocatalytic route for the copolymerization of a spectrum of epoxides and cyclic anhydrides. Fully alternating polyesters were synthesized by a variety of organic Lewis acid?base pairs including organo...
http://www.polymer.cn/research/sy_info19594 |
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Anionic Copolymerization of Carbonyl Sulfide with Epoxides via Alkali Metal Alkoxides
关键字：carbonyl sulfide, copolymerization, alkali metal alkoxides, sulfur-containing polymer
Carbonyl sulfide (COS), an analogue of carbon dioxide (CO2), can be converted to CO2 via the carbonic anhydride enzymes widely existing in nature. COS is an ideal monomer for making poly(monothiocarbonate)s, which are difficult to synthesize by traditional methods. Herein, for the first time, we describe an anionic copolymerization of COS with epoxides using alkali metal alkoxides as the catalys...
http://www.polymer.cn/research/sy_info19591 |
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Controlled Growth of Metal-Organic Frameworks on Polymer Brushes
关键字：grafting density, metal-organic frameworks, polymer brushes, self-initiated photografting and photopolymerization, surface-attached MOF
Polymer brushes are for the first time used to induce the synthesis of metal-organic frameworks (MOFs). The semi-fixed polymer chains provide a confined environment,
which allows a mild growth of MOFs in between polymer chains to give surface-attached spherical MOF nanoparticles, in contrast to the larger MOF cubes/plates formed simultaneously in solution. Polymer brushes bearing carboxylate ...
http://www.polymer.cn/research/sy_info19500 |
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Ionic-Liquid-Grafted Rigid Poly(p-Phenylene) Microspheres Efficient Heterogeneous Media for Metal Scavenging and Catalysis
关键字：ionic liquids, metal scavenging, microspheres, nanoparticles
Novel guanidinium ionic liquid-grafted rigid poly(p-phenylene) (PPPIL) microspheres have been developed for metal scavenging and catalysis. The noble-metal nanoparticles supported on the microspheres surface can be used as efficient heterogeneous catalysts. The combination of nanoparticles and ionic liquid fragments on the microsphere surfaces enhance the activity and...
http://www.polymer.cn/research/sy_info19389 |
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Degradation of P-nitrophenol Stimulated by Thermally Activated Persulfate : Effects of T3mperature and Metal Ions
关键字：Persulfate, P-nitrophenol, Metal ions , Sulfate free radicals , Thermally activate
In this study,batch reactor experiments were performed to determine the degradation of PNP through thermally activated persulfate which was expected to produce highly reactive sulfate free radicaI(S04).Several factorsincluding temperatu...
http://www.polymer.cn/research/dis_info17323 |
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CORE – SHELL POLYMER BEADS TO REMOVE HEAVY METAL IONS IN INDUSTRY APPLICATION
关键字：CORE,SHELL,POLYMER,BEADS,REMOVE,HEAVY,METAL,IONS,INDUSTRY,APPLICATION,
A new approach to remove heavy metal ions from industry wastewater is molecular imprinting polymer (MIP).
http://www.polymer.cn/research/dis_info5706 |
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