Synthesis, characterization and ethylenepolymerization behavior of nickel dihalide complexes bearing bulky unsymmetrical α-diimine ligands

Líu, Hao; Zhao, Wei; Yu, Jiangang; Yang, Wenhong; Hao, Xiang; Redshaw, Carl; Chen, Langqiu; Sun, Wen‐Hua

doi:10.1039/c1cy00319d

Cited by 104 publications

(74 citation statements)

References 52 publications

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“…The resulting polyethylenes revealed high molecular weights and branching contents lower than that observed using the diiminoacenaphthene-nickel derivatives 14a, 14b and 15a ( Fig. 6) [63,64,67].…”

Section: < Figure 6>mentioning

confidence: 97%

“…6) [63][64][65][66][67][68]. When the para-R group is Me (14a), activation with either Et2AlCl or MAO, led to an exceptionally active catalyst (up to 1.1 × 10 7 g(PE) mol -1 (Ni) h -1 ) producing highly branched polyethylene [63].…”

Section: < Figure 6>mentioning

confidence: 99%

“…5) [60][61][62][63][64][65][66][67][68][69][70][71][72][73]. Complexes 11-13 all showed high catalytic activity and good thermal stability for ethylene polymerization [60][61][62].…”

Section: < Figure 5>mentioning

confidence: 99%

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Recent advances in Ni-mediated ethylene chain growth: Nimine-donor ligand effects on catalytic activity, thermal stability and oligo-/polymer structure

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Section: < Figure 6>mentioning

confidence: 97%

Section: < Figure 6>mentioning

confidence: 99%

See 1 more Smart Citation

Recent advances in Ni-mediated ethylene chain growth: Nimine-donor ligand effects on catalytic activity, thermal stability and oligo-/polymer structure

Zheng

Liu

Solan

et al. 2017

Coordination Chemistry Reviews

Self Cite

262

154

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“…The applications of various graphene based materials in water disinfection are given in supporting information Table S8. [171][172][173][174][175][176][177][178][179][180][181][182][183][184][185][186] Akhavan et al [172] synthesized graphene oxide nanowells (GONWs) and reduced graphene oxide nanowells (RGONWs) and studied their antibacterial properties on E. coli (gram-negative) and Staphylococcus aureus (gram-positive). GONWs showed 74 % and 59 % antibacterial efficiency upon a direct contact to S. aureus and E. coli, respectively, in 1 h. RGONWs showed 84 % E. coli inactivation and 95 % S. aureus inactivation within 1 h. The prepared materials showed high antibacterial efficiency for S. aureus compared with E. coli.…”

Section: Application Of Graphene Based Materials In Water Disinfectionmentioning

confidence: 99%

Graphene and Graphene‐Based Composites: A Rising Star in Water Purification ‐ A Comprehensive Overview

et al. 2016

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Graphene is an interesting two-dimensional carbon sheet possessing single-layered atom thickness that confers unique physical and chemical properties. The pristine graphene sheets have some limited applications in water purification, but the modification of graphene into the graphene composite by the incorporation of some functional groups or nanoparticles on the surface extensively increases its environmental applications. Recently, graphene nanocomposites have found to show very promising applications in all types of water purification. The present review highlights the recent developments in the applications of graphene and graphene-based composites as adsorbent, catalyst, photocatalyst, electrocatalyst, photoelectrocatalyst, and disinfection and desalination agent in comprehensive water purification systems. We primarily focus on the environmental engineering applications of graphene nanocomposites as sorbent materials for the elimination of toxic inorganic (cationic and anionic), organic, and mixed/multiple pollutants, and as catalysts for the degradation of toxic organic contaminants using catalytic oxidation, photocatalytic oxidation, electrocatalytic oxidation, and photoelectrocatalytic oxidation. We have also discussed the use and feasibility of graphene nanocomposites in water disinfection and desalination. Finally, the future challenges and perspectives are discussed.

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“…In contrast to complexes of early transition-metals, the late-transitionmetal (LTM) complexes reported by Brookhart [4] and Gibson [5] are attracting increasing attention because of the easy preparation and modification of their Schiff base ligands [6][7][8]. Recently, according to different coordination forms, some LTM-based complexes with novel diimine ligands containing Fe [9][10][11][12], Co [13,14], Ni [15][16][17][18][19][20][21], Pd [22,23] are applied to olefin polymerization. The products obtained using such catalysts can be changed from polyethylene (PE) to oligomers by tuning the steric and electronic properties of the ligands [24].…”

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confidence: 99%

Recent progress in immobilization of late-transition-metal complexes with diimine ligands for olefin polymerization

Jiang

et al. 2013

Chin. Sci. Bull.

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Late-transition-metal (LTM) catalysts are a family of very flexible ethylene polymerization catalysts because their catalytic performance can be easily adjusted by modifying the ligand structure. Their less oxyphilicity character, which may promote the production of copolymers from ethylene and polar comonomers, is another aspect that attracts much attention in both academic and industrial fields. The immobilization of LTM catalysts on spherical supports is a crucial step prior to their use in the industrial processes of gas-phase or slurry polymerizations. This paper reviews recent developments in supported LTM catalysts for olefin polymerization, and summarizes loading methods and mechanisms of the immobilization of LTM catalysts on inorganic, organic, and inorganic-organic materials, and the effects of immobilization on catalytic activity, polymerization mechanism, and polymer morphology. [22,23] are applied to olefin polymerization. The products obtained using such catalysts can be changed from polyethylene (PE) to oligomers by tuning the steric and electronic properties of the ligands [24]. Bulky complexes can produce high-molecular-weight branched PE, without the addition of α-olefin comonomers, in the presence of methylaluminoxane (MAO). Some bulky catalysts with special backbone such as camphyl and acenaphthyl show highly thermal stability and good control ability for olefin polymerization [25]. Late transition-metals are more suitable for the copolymerization of ethylene with commercial polar olefins because of their better tolerance of polar functional groups. Only amorphous polymers can be obtained if the polymerization is catalyzed by homogeneous catalysts, inevitably leading to reactor fouling in industrial units. To meet the requirements of continuous industrial gas-phase or slurry polymerization units, a crucial step for the industrialization of LMT catalysts is the immobilization of such catalysts on spherical supports to obtain morphologically uniform polymer particles. late-transition-metal complexes, diimine, immobilization, olefin polymerization

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Synthesis, characterization and ethylenepolymerization behavior of nickel dihalide complexes bearing bulky unsymmetrical α-diimine ligands

Cited by 104 publications

References 52 publications

Recent advances in Ni-mediated ethylene chain growth: Nimine-donor ligand effects on catalytic activity, thermal stability and oligo-/polymer structure

Recent advances in Ni-mediated ethylene chain growth: Nimine-donor ligand effects on catalytic activity, thermal stability and oligo-/polymer structure

Graphene and Graphene‐Based Composites: A Rising Star in Water Purification ‐ A Comprehensive Overview

Recent progress in immobilization of late-transition-metal complexes with diimine ligands for olefin polymerization

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