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Living catalyzed-chain-growth polymerization and block copolymerization of isoprene by rare-earth metal allyl precursors bearing a constrained-geometry-conformation ligandw
Aminophenyl functionalized cyclopentadienyl ligated rare-earth metal allyl mediated cationic systems display high cis-1,4 selectivity for the polymerization of isoprene, and living reversible and rapid chain transfer to aluminium additives.
http://www.polymer.cn//ss/dongmeicui/publicationsshow_11958.html |
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Thiophene-NPN Ligand Supported Rare-Earth Metal Bis(alkyl) Complexes. Synthesis and Catalysis toward Highly trans-1,4 Selective Polymerization of Butadiene
A series of new rare-earth metal bis(alkyl) complexes [L1?3Ln(CH2SiMe3)2(THF)n] (L1 = MeC4H2SCH2NC6H4(Ph)2P═NC6H2Me3-2,4,6: Ln = Sc, n = 1 (1a); Ln = Lu, n = 1 (1b); L2 = MeC4H2SCH2NC6H4(Ph)2P═NC6H3Et2-2,6: Ln = Sc, n = 1 (2a); Ln = Lu, n = 1 (2b); Ln = Y, n = 1 (2c); L3 = MeC4H2SCH2NC6H4(Ph)2P═NC6H3iPr2-2,6: Ln = Sc, n&nbs...
http://www.polymer.cn//ss/dongmeicui/publicationsshow_11933.html |
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New rare earth metal bis(alkyl)s bearing an iminophosphonamido ligand. Synthesis and catalysis toward highly 3,4-selective polymerization of isoprene
New rare earth metal bis(alkyl) complexes [(NPNPh)Ln(CH2SiMe3)2(THF)] (NPNPh: N(Ph)PPh2═NC6H2Me3-2,4,6; Ln = Sc (3a), Ln = Y (3b), Ln = Lu (3c)) and [(NPNPy)Sc(CH2SiMe3)2(THF)] (NPNPy = N(Py)PPh2═NC6H2Me3-2,4,6) (3d)) have been prepared via protonolysis reaction between rare earth metal tris(alkyl)s and the corresponding iminophosphonamines. Complexes 3a?d are analogous monomers...
http://www.polymer.cn//ss/dongmeicui/publicationsshow_11928.html |
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Isoselective 3,4-(co)polymerization of bio-renewable myrcene using NSN-ligated rare-earth metal precursor: an approach to a new elastomer
The polymerization of bio-renewable myrcene (MY), using a cationic beta-diimidosulfonate lutetium catalyst in high activity, afforded an unprecedented isotactic 3,4-polymyrcene (PMY) with a low T-g (-42 degrees C). Based on this result, the random and block copolymerization of myrcene and isoprene (IP) resulted in novel elastomers that comprise the amorphous iso-3,4-PMY and iso-3,4-PIP sequences...
http://www.polymer.cn//ss/dongmeicui/publicationsshow_11890.html |
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Highly cis-1,4 Selective Polymerization of Dienes with Homogeneous Ziegler-Natta Catalysts Based on NCN-Pincer Rare Earth Metal Dichloride Precursors
The first aryldiimine NCN-pincer ligated rare earth metal dichlorides (2,6-(2,6-6H3R2NdCH)2-C6H3)LnCl2(THF)2 (Ln ) Y, R ) Me (1), Et (2), iPr (3); R ) Et, Ln ) La (4), Nd (5), Gd (6), Sm (7), Eu (8),Tb (9), Dy (10), Ho (11), Yb (12), Lu (13)) were successfully synthesized via transmetalation between2,6-(2,6-C6H3-R2NdCH)2-C6H3Li and LnCl3(THF)1～3.5. These complexes are isostructural monomers wit...
http://www.polymer.cn//ss/dongmeicui/publicationsshow_11883.html |
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(ACS Applied Materials & Interfaces) Selective Metallization Induced by Laser Activation: Fabricating Metallized Patterns on Polymer via Metal Oxide Composite
Recently, the metallization on polymer substrates has been paid more attention due to its outstanding properties of both plastics and metals. In this study, the metal oxide composite of copper-chromium oxide (CuO·Cr2O3) was incorporated into the polymer matrix to design a good laser direct structuring (LDS) material, and the well-defined copper pattern (thickness =10 μm) was successfully...
http://www.polymer.cn//ss/zhoutaopoly/publicationsshow_10285.html |
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Metal-organic framework MIL-53(Al) as a solid-phase microextraction adsorbent for the determination of 16 polycyclic aromatic hydrocarbons in water samples by gas chromatography-tandem mass spectrometry.
In this paper, the potential applications of metal-organic framework (MOF) materials as fiber coatings for the solid-phase microextraction (SPME) of polycyclic aromatic hydrocarbons (PAHs) in water samples were explored. Fibers coated with MIL-53(Al, Cr, Fe) materials were fabricated by an adhesive method for SPME. The quantitation was performed by gas chromatography-tandem mass spectrometry (GC...
http://www.polymer.cn//ss/luxiaoqing/publicationsshow_10224.html |
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Dithiafulvenyl unit as a new donor for high-efficiency dye-sensitized solar cells: Synthesis and demonstration of a family of metal-free organic sensitizers.
This work identifies the dithiafulvenyl unit as an excellent electron donor for constructing D?π–A-type metal-free organic sensitizers of dye-sensitized solar cells (DSCs). Synthesized and tested are three sensitizers all with this donor and a cyanoacrylic acid acceptor but differing in the phenyl (DTF-C1), biphenyl (DTF-C2), and phenyl–thiopheneyl–phenyl π-bridges (DTF-C3). Devices based o...
http://www.polymer.cn//ss/luxiaoqing/publicationsshow_10220.html |
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Nitrogen-doped porous carbons from bipyridine-based metal-organic frameworks: Electrocatalysis for oxygen reduction reaction and Pt-catalyst support for methanol electrooxidation
A novel pyridine-containing metal-organic framework (MOF), [Zn(bpdc)DMA]·DMF, was first constructed by solvothermal reaction of 2,2′-bipyridine-5,5′-dicarboxylate (bpdc) with zinc nitrate, and then it was converted to nitrogen-doped porous carbons (NPCs) by direct carbonization. The as-prepared porous carbon (NPC800) was characterized by scanning electron microscopy (SEM), X-ray powder di...
http://www.polymer.cn//ss/zhaoxuebo/publicationsshow_9859.html |
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Fabrication of new metal phosphonates from tritopic trisphosphonic acid containing methyl groups and auxiliary ligands: syntheses, structures and gas adsorption properties
Hydrothermal reactions of benzene-1,3,5-triyltris(methylene)triphosphonic acid (H6L1) or (2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene)triphosphonic acid (H6L2) with metal sulfates, 4,4′-bipyridyl (4,4′-bipy), 2,2′-bipyridyl (2,2′-bipy), 1,10-phenanthroline (1,10-phen) and 1,2-di(4-pyridyl)ethylene (dpe), afforded eight new transition metal trisphosphonates, namely, [Cu2(H3L1)2(H2O)2][H2d...
http://www.polymer.cn//ss/zhaoxuebo/publicationsshow_9831.html |
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