含吸电子基团配体的α-二亚胺-Ni(Ⅱ)上乙烯聚合反应性能

催化学报 , 2011, 32(3): 490-494. doi: 10.3724/SP.J.1088.2011.01040

含吸电子基团配体的α-二亚胺-Ni(Ⅱ)上乙烯聚合反应性能

袁建超 ^1, , 王学虎 ^2, , 刘玉凤 ^3, , 梅铜简 ^4,

1.西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,甘肃兰州,730070

2.西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,甘肃兰州,730070

3.西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,甘肃兰州,730070

4.西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,甘肃兰州,730070

基金项目: 2010年人力资源和社会保障部留学人员科技活动项目择优资助项目国家自然科学基金(20964003) 2010教育部留学回国人员科研启动基金

关键词： α-二亚胺 , 镍 , 配合物 , 后过渡金属催化剂 , 二乙基氯化铝 , 乙烯 , 聚合 , 聚乙烯

Catalytic Properties of α-Diimine-Ni (Ⅱ) Catalyst Containing Electron Withdrawing Substituent for Ethylene Polymerization

合成了一种新型的含溴α-二亚胺配体及其Ni配合物,并采用核磁共振氢谱、核磁共振碳谱、元素分析、傅里叶变换红外光谱和X射线光电子能谱进行了表征.同时以二乙基氯化铝为助催化剂用于乙烯聚合反应,考察了温度、Al/Ni摩尔比和配体结构对聚合反应性能的影响.结果表明,在25℃,Al/Ni摩尔比为600时,该催化剂活性最高,可达3.73×107g/(mol·b·MPa),与不含吸电子基团Br的同类催化剂活性相当,且催化剂热稳定性和产物聚乙烯支化度明显提高.

参考文献

[1]	Johnson L K;Killian C M;Brookhart M .[J].Journal of the American Chemical Society,1995,117:6414.
[2]	Ittel S D;Johnson L K;BrookhartM .[J].Chemical Reviews,2000,100:1169.
[3]	Gottfried AC.;Brookhart M. .Living and block copolymerization of ethylene and alpha-olefins using palladium(II)-alpha-diimine catalysts[J].Macromolecules,2003(9):3085-3100.
[4]	Liu J Y;Li Y G;Li Y S;Hu N H .[J].Journal of Applied Polymer Science,2008,109:700.
[5]	Endo K;Kondo Y .Polymerization of 2-pentene with Ni(II) alpha-diimine complex/M-MAO catalyst and structure of the polymer[J].Journal of Polymer Science, Part A. Polymer Chemistry,2008(8):2858-2863.
[6]	Sun WH.;Yang HJ.;Li ZL.;Li Y. .Vinyl polymerization of norbornene with neutral salicylaldiminato nickel(II) complexes[J].Organometallics,2003(18):3678-3683.
[7]	Camacho D H;Salo E V;Ziller J W;Guan Z B .[J].Angewandte Chemie International Edition,2004,43:1821.
[8]	Liu F Sh;Hu H B;Xu Y;Guo L H Zai Sh B Song K M Gao H Y Zhang L Zhu F M Wu Q .[J].Macromolecules,2009,42:7789.
[9]	Guan Z B;Popeney C S .[J].Topics in Physical Organometallic Chemistry,2009,26:179.
[10]	Yuan J C;Silva L C;Gomes P T;Valerga B Campos J M Ribeiro M R Chien J C W Marques M M .[J].Polymer,2005,46:2122.
[11]	Ward L G L;Pipal J R .[J].Inorganic Syntheses,1972,13:162.
[12]	Gates DP.;Onate E.;Killian CM.;Johnson LK.;White PS. Brookhart M.;Svejda SK. .Synthesis of branched polyethylene using (alpha-diimine)nickel(II) catalysts: Influence of temperature, ethylene pressure, and ligand structure on polymer properties[J].Macromolecules,2000(7):2320-2334.
[13]	Zhong HA.;Labinger JA.;Bercaw JE. .C-H bond activation by cationic platinum(II) complexes: Ligand electronic and steric effects[J].Journal of the American Chemical Society,2002(7):1378-1399.
[14]	DeYonker N J;Foley N A;Cundari T R;Gunnoe T B Petersen J L .[J].Organometallics,2007,26:6604.
[15]	Maldanis RJ.;Wood JS.;Chandrasekaran WA.;Rausch MD.;Chien JCW. .The formation and polymerization behavior of Ni(II) alpha-diimine complexes using various aluminum activators[J].Journal of Organometallic Chemistry,2002(1/2):158-167.
[16]	Meinhard D;Wegner M;Kipiani G;Hearley A Reuter P Fischer S Marti O Rieger B .[J].Journal of the American Chemical Society,2007,129:9182.
[17]	Galland G B;de Souza R F;Mauler R S;Nunes F F .[J].Macromolecules,1999,32:1620.

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