期刊文献+
共找到66篇文章
< 1 2 4 >
每页显示 20 50 100
Synthesis and Characterization of a Palladium Complex Supported by Bidentate Ligand and Catalysis of the Vinyl Polymerization of Norbornene
1
作者 LI Hui-Ping MAO Min-Jie +6 位作者 YU Jin-Fa ZHOU Xian-Bo JIAN Li-Ju ZHANG Dan-Dan LIN Mei-Jun CHEN Jian-Xin ZHANG Zhi-Chun 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第10期1619-1625,共7页
The title complex N,O-bis{[2-[(2,4-dimethylphenyl)imino]-5-methoxyl]-phenol}-palladium(Ⅱ)(CC_(32)H_(32)N_2O_4Pd) has been synthesized by the reaction of 2-[(2,4-dimethylphenyl)imino]-5-methoxyl-phenol wit... The title complex N,O-bis{[2-[(2,4-dimethylphenyl)imino]-5-methoxyl]-phenol}-palladium(Ⅱ)(CC_(32)H_(32)N_2O_4Pd) has been synthesized by the reaction of 2-[(2,4-dimethylphenyl)imino]-5-methoxyl-phenol with Pd(CH_3COO)_2,and characterized by elemental analysis,IR spectrum and single-crystal X-ray diffraction analysis.The crystal belongs to the monoclinic system,space group P2_1/c with a = 12.058(2),b = 8.3624(17),c = 14.735(3) ?,β = 107.66(3)°,V = 1415.7(5)?~3,C_(32)H_(32)N_2O_4Pd,Mr = 615,Z = 2,D_c = 1.443 Mg/m^3,μ = 0.695 mm^(-1),F(000) = 632,T = 293(2) K,the final R = 0.0514 and w R = 0.1356(I 〉 2s(I)).Under the co-catalysis of methylaluminoxane(MAO),the palladium compound exhibited favorable catalytic activity for the polymerization of norbornene(NB). 展开更多
关键词 palladium complex norbornene polymerization bidentate ligand crystal structure CATALYSIS
下载PDF
Template Synthesis and Structure of Dinuclear Zinc Complex with Three Kinds of Pyrazole Ligands
2
作者 张文兴 郑井明 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 1996年第5期404-407,共4页
The title complex[Zn_2L(C_5H_7N_2)_2(C_5H_7N_2·HClO_4)_2](L=1,2-di(3', 5'-dimethylpyrazolyl) formylhydrazine and C_5H_7N_2= 3 , 5 dimethylpyrazole anion) has been synthesized by template reaction, in whic... The title complex[Zn_2L(C_5H_7N_2)_2(C_5H_7N_2·HClO_4)_2](L=1,2-di(3', 5'-dimethylpyrazolyl) formylhydrazine and C_5H_7N_2= 3 , 5 dimethylpyrazole anion) has been synthesized by template reaction, in which carbonhydrazine, 2, 4-pentanedione and zinc perchlorate hexahydrate were used as the original materials. The crystals of complex with formula C_(32)H_(46)N_(14)O_(10)Cl_2Zn_2 (Mr=988.46) are triclinic,space group P1,a= 8.275 (2),b=11.523 (3),c= 12.872(5), a=69. 90(3),β= 69.79 (2), γ=83. 52 (2)°,V=1081.6(6),Z=1,Dc=1.524g/cm ̄3,μ=13.265cm ̄(-1),F (000)=510. The final refinement is converged with R= 0.057. The results indicate that in one complex molecule there are three kinds of pyrazole rings all directly coordinated to the central Zn atom; and each zinc atom possesses a five-coordinated polyhedron. 展开更多
关键词 pyrazolyl ligand dinuclear complex template crystal structure
全文增补中
Catalytic Synthesis of Polymethyl Methacrylate by Mixed Ligand Schiff Base Lanthanocene Complexes
3
作者 Yousaf MUHAMMAD 1, HUANG Jiling 1, FENG Zuofeng 1, QIAN Yanlong 1, SUN Junquan 2, PAN Zhida 2(1 Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China 2 Material and Chemical Engineering Co 《催化学报》 CSCD 北大核心 2000年第4期293-294,共2页
关键词 聚甲基丙烯酸甲酯 催化合成 席夫碱稀土茂配合物
下载PDF
SYNTHESIS,CHARACTERIZATION AND CATALYTIC BEHAVIOR OF DIMERIC Co(Ⅱ) AND Ni(Ⅱ) COMPLEXES CONTAINING N,N’-(PHENYL-2-PYRIDINYLMETHYLENE)-3,3’,5,5’-TETRAMETHYLBENZIDINE 被引量:1
4
作者 孙文华 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第5期539-545,共7页
The N,N -(phenyl-2-pyridinylmethylene)-3,3 ,5,5 -tetramethylbenzidine and its dimeric Co(Ⅱ)and Ni(Ⅱ) complexes were synthesized.The organic compound was characterized by elemental analyses,IR and NMR spectra,while t... The N,N -(phenyl-2-pyridinylmethylene)-3,3 ,5,5 -tetramethylbenzidine and its dimeric Co(Ⅱ)and Ni(Ⅱ) complexes were synthesized.The organic compound was characterized by elemental analyses,IR and NMR spectra,while the bimetal complexes were determined by elemental analyses,IR spectra as well as the single-crystal X-ray diffraction.The nickel complex showed high activity for ethylene polymerization and its cobalt analogue showed negligible active in ethylene activation. 展开更多
关键词 Bis-pyridinylimino ligand Nickel complex Cobalt complex Ethylene polymerization
下载PDF
Synthesis and Crystal Structure of a Novel Ca(Ⅱ) Coordination Polymer Containing Dipyridine Dicarboxylic Ligand 被引量:1
5
作者 达日贺扎布 索全玲 +4 位作者 高媛媛 海尔汗 解瑞俊 竺宁 韩利民 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第4期585-590,共6页
The novel alkaline metal complex Ca(BPDCH)2 (1, BPDCH2 = 2,2'-bipyri- dine-5,5'-dicarboxylic acid) has been synthesized by the hydrothermal reaction of Ca(NO3)2·4H2O with 2,2'-bipyridine-5,5'-dicarboxyl... The novel alkaline metal complex Ca(BPDCH)2 (1, BPDCH2 = 2,2'-bipyri- dine-5,5'-dicarboxylic acid) has been synthesized by the hydrothermal reaction of Ca(NO3)2·4H2O with 2,2'-bipyridine-5,5'-dicarboxylic acid. The molecular and crystal structures of complex 1 have firstly been characterized by FTIR, elemental analysis, and X-ray single-crystal diffraction. The 3D MOF structure of complex 1 was interpreted by the versatile binding modes-the intermolecular hydrogen bonds and π-π stacking interactions of 2,2'-bipyridine-5,5'-dicarboxylic acid ligand. The analysis results show complex 1 belongs to a coordination polymer with 3D MOF structure. The results of thermogravimetric analysis and solubility demonstrate complex 1 is a thermostable compound and does not dissolve in water and traditional organic solvents. 展开更多
关键词 calcium complex coordination polymer molecular and crystal structure bipyridine-dicarboxylic ligand thermo-stability
下载PDF
蒽基取代含酚单茂催化剂在乙烯聚合中的应用
6
作者 郭钦生 韩书亮 +1 位作者 宋文波 董泽 《石油化工》 CAS CSCD 北大核心 2024年第6期802-809,共8页
以蒽基取代的含酚单茂催化剂为主催化剂,三苯甲基四(五氟苯基)硼酸盐为助催化剂进行了乙烯均聚和乙烯/α-烯烃共聚反应,利用DSC,GPC等方法考察了该催化体系在不同聚合条件下的聚合性能。实验结果表明,该催化体系催化乙烯均聚的活性最高... 以蒽基取代的含酚单茂催化剂为主催化剂,三苯甲基四(五氟苯基)硼酸盐为助催化剂进行了乙烯均聚和乙烯/α-烯烃共聚反应,利用DSC,GPC等方法考察了该催化体系在不同聚合条件下的聚合性能。实验结果表明,该催化体系催化乙烯均聚的活性最高可达到3.36×10^(6)g/(mol·h)。适宜的聚合条件为:催化剂用量10μmol,n(Al)∶n(Ti)=150,n(B)∶n(Ti)=1.5,反应温度20℃,反应压力0.4 MPa,聚合时间10 min,液体总体积200 mL。在该条件下还可催化乙烯与α-烯烃共聚,其中,与1-辛烯共聚时,聚合活性最高可达2.00×10^(6)g/(mol·h),共聚物密度在0.859~0.876 g/cm3之间,玻璃化转变温度均低于-52℃,符合乙烯共聚弹性体的结构性能特征,且通过调节共聚单体浓度能有效控制乙烯共聚物链结构。 展开更多
关键词 单茂金属配合物 苯酚配体 乙烯聚合 乙烯共聚物 聚烯烃弹性体
下载PDF
SYNTHESES,CHARACTERIZATION AND ETHYLENE POLYMERIZATION OF HALF-SANDWICH GROUP IV METAL COMPLEXES WITH TRIDENTATE [O,N,S] LIGANDS 被引量:1
7
作者 Ya-lin Qiao Ping Hu 金国新 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2013年第5期760-768,共9页
A series of half-sandwich group IV metal complexes with tridentate monoanionic phenoxy-imine arylsulfide [O-NS] ligand [2-Bu^t4-Me-6-((2-(SC6H5)C6H4N = CHC6H2O)]- (La) and dianionic phenoxy-amine arylsulfide [O... A series of half-sandwich group IV metal complexes with tridentate monoanionic phenoxy-imine arylsulfide [O-NS] ligand [2-Bu^t4-Me-6-((2-(SC6H5)C6H4N = CHC6H2O)]- (La) and dianionic phenoxy-amine arylsulfide [O-N-S] ligand [2-Bu^t4-Me-6-((2-(SC6H5)C6H4N-CH2C6H2O)]2- (Lb) have been synthesized and characterized. Lb was obtained easily in high yield by reduction of ligand La with excess LiAlH4 in cool diethyl ether. Half-sandwich Group Ⅳ metal complexes CpTi[O-NS]Cl2 (1a), CpZr[O-NS]Cl2 (1b), CpTi[O-N-S]Cl (2a), CpZr[O-N-S]Cl (2b) and CpZr[O-N-S]Cl (2c) were synthesized by the reactions of La and Lb with CpTiCl3, CpZrCl3 and Cp ZrCl3, and characterized by IR, ^1H-NMR, ^13C-NMR and elemental analysis. In addition, an X-ray structure analysis was performed on ligand Lb. The title Group IV half-sandwich bearing tridentate [O,N,S] ligands show good catalytic activities for ethylene polymerization in the presence of methylaluminoxane (MAO) as co-catalyst up to 1.58 × 10^7 g-PE.mol-Zr-1.h-1. The good catalytic activities can be maintained even at high temperatures such as 100 ℃ exhibiting the excellent thermal stability for these half-sandwich metal pre-catalysts. 展开更多
关键词 Half-sandwich group IV metal complexes Tridentate dianionic ligands Phenoxy-imine arylsulfide ligands Catalyst Ethylene polymerization
原文传递
Binuclear Aluminum Complexes Supported by Linked Bis(β-diketiminate) Ligands for Ring-Opening Polymerization of Cyclic Esters 被引量:1
8
作者 Shaogang Gong Peng Du Haiyan Ma 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2018年第2期190-201,共12页
Binuclear aluminum alkyl complexes 2a–4g supported by linked bis(β-diketiminate) ligands were synthesized via the reaction of AlEt3 or AlMe3 and the corresponding proligand in a 2:1 molar ratio with moderate yiel... Binuclear aluminum alkyl complexes 2a–4g supported by linked bis(β-diketiminate) ligands were synthesized via the reaction of AlEt3 or AlMe3 and the corresponding proligand in a 2:1 molar ratio with moderate yields. The isolated complexes were well-characterized by ^1H-NMR, ^13C-NMR and elemental analysis. The binuclear nature of aluminum complex 2b was further confirmed by an X-ray diffraction study. All complexes 2a–4g could efficiently initiate the ring-opening polymerization(ROP) of ε-caprolactone in toluene. The substituents at the aromatic rings and the linker unit in the auxiliary ligands exerted significant influence on the catalytic behavior of the investigated aluminum complexes. Complex 4g(R^1 = R^2 = Cl) containing propylenyl bridging unit exhibited the highest catalytic activity among these complexes, which might be attributed to the increased electrophilicity of the metal center as well as more opened coordination sphere. The molecular weights of obtained poly(ε-caprolactone)s deviating considerably from the theoretical values indicated that the ROP of ε-caprolactone by complexes 2a–4g was not well-controlled, which was also judged from the broad molecular weight distributions(MWD = 1.47-2.47) of produced poly(ε-caprolactone)s. These complexes proved to be inactive toward the polymerization of rac-lactide alone. In the presence of alcohol the polymerization occurred, which was actually initiated by the decomposition species of the aluminum complex upon the treatment with isopropanol. 展开更多
关键词 Bis(β-diketiminate) ligand Aluminum complex BINUCLEAR polymerization Cyclic ester
原文传递
Rare-earth Metal Dialkyl Complexes Supported by 1,3-Disubstituted Indolyl Ligand: Synthesis, Characterization and Catalytic Activity for Isoprene Polymerization 被引量:1
9
作者 GUO Li-Ping SONG Ren-Yuan 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第8期1055-1060,970,共7页
Rare-earth metal dialkyl complexes[1-Bn-3-(DippN=CH)C_(8)H_(4)N]RE(CH_(2)SiMe_(3))2(thf)2(Dipp=2,6-iPr_(2)C_(6)H_(3),RE=Y(1)and Er(2))were prepared through the cyclometalation reactions of the N-Bn-3-imino-functionali... Rare-earth metal dialkyl complexes[1-Bn-3-(DippN=CH)C_(8)H_(4)N]RE(CH_(2)SiMe_(3))2(thf)2(Dipp=2,6-iPr_(2)C_(6)H_(3),RE=Y(1)and Er(2))were prepared through the cyclometalation reactions of the N-Bn-3-imino-functionalized indolyl ligand 1-Bn-3-(DippN=CH)C8H5N with one equivalent of rare-earth metal trialkyl precursors.The structures of compounds 1 and 2 were confirmed by X-ray crystal analyses and characterized by elemental analysis,IR,NMR spectroscopy wherein applicable.In the presence of cocatalysts,these rare-earth metal dialkyl complexes initiated isoprene polymerization with a high activity(95% conversion of 2000 equivalent of isoprene in 360 min),producing polymers with high regioselectivity(1,4-polymers up to 91%). 展开更多
关键词 indolyl ligand rare-earth metal dialkyl complex ISOPRENE polymerization
原文传递
Styrene polymerization catalyzed by nickel complexes bearing hydroxyindanone-iminate ligands
10
作者 TANG GuangRong JIN GuoXin 《Chinese Science Bulletin》 SCIE EI CAS 2008年第18期2764-2769,共6页
Activated by methylaluminoxane, mononuclear bis(hydroxyindanone-iminate)nickel complexes Ni[ArN == CC_2H_3(CH3)C_6H_2(R)O]_2 (Ar = 2,6-i-Pr2C6H3, R = Me (1), R = Cl (2), and R = H (3)) showed good activity for the sty... Activated by methylaluminoxane, mononuclear bis(hydroxyindanone-iminate)nickel complexes Ni[ArN == CC_2H_3(CH3)C_6H_2(R)O]_2 (Ar = 2,6-i-Pr2C6H3, R = Me (1), R = Cl (2), and R = H (3)) showed good activity for the styrene polymerization. The effect of many reaction parameters including the Al/Ni ratio, tempera- ture, and reaction time on catalytic activities of catalytic systems and the molecular weights of the ob- tained polystyrene was ascertained. The highest activity of 1.34×105 g(PS)·mol^(-1)(Ni)·h^(-1) was obtained under the optimum reaction condition. The 13C NMR spectra of the polymers revealed that the polymer was isotactic-rich atactic polystyrene. And the coordination mechanism was confirmed by the analyses of the polymer chain end-groups. 展开更多
关键词 苯乙烯 聚合反应 混合物 甲缩醛
原文传递
新型络合吸附剂的研究(Ⅱ)——铜离子模板高分子多乙烯多胺络合吸附剂的合成和特性 被引量:9
11
作者 王补森 丁泽仁 +2 位作者 李文兰 郭振良 何炳林 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1993年第4期582-585,共4页
以金属Cu(Ⅱ)离子为模板,合成了高分子多乙烯多胺络合吸附剂,研究了它们对重金属离子(Cu^(2+),Ni^(2+),Co^(2+),Zn^(2+))的吸附特性。发现这类吸附剂具有高吸附容量和优良的吸附选择性。
关键词 络合吸附剂 模板聚合 配位络合物
下载PDF
含溴α-二亚胺镍(Ⅱ)配合物的合成、表征及催化乙烯聚合反应 被引量:13
12
作者 袁建超 梅铜简 +1 位作者 王学虎 刘玉凤 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2011年第5期1200-1204,共5页
合成了一种新型含溴α-二亚胺及其镍配合物,采用1H NMR、13C NMR、FTIR、元素分析和XPS等方法进行表征.用配合物作为催化剂,以甲基铝氧烷(MAO)为助催化剂催化乙烯聚合得到高支化度的聚乙烯,并研究了聚合条件(如Al/Ni摩尔比、聚合温度以... 合成了一种新型含溴α-二亚胺及其镍配合物,采用1H NMR、13C NMR、FTIR、元素分析和XPS等方法进行表征.用配合物作为催化剂,以甲基铝氧烷(MAO)为助催化剂催化乙烯聚合得到高支化度的聚乙烯,并研究了聚合条件(如Al/Ni摩尔比、聚合温度以及配体结构)对催化活性的影响,结果表明,在反应温度为25℃,Al/Ni摩尔比为800时,该催化剂催化乙烯聚合活性高达55 g PE/(mol Ni.h.Pa),且催化剂具有较好的热稳定性.与不含吸电子基团Br的同类催化剂相比,活性相当,但催化剂的热稳定性和聚合所得聚乙烯支化度有较大程度的提高. 展开更多
关键词 含溴α-二亚胺 镍(Ⅱ)配合物 乙烯聚合 支化聚乙烯
下载PDF
以交联聚丙烯酸甲酯为载体的多乙烯多胺/铜(Ⅱ)络合物的合成及其对尿素的吸附性 被引量:11
13
作者 何炳林 宗芳 马建标 《功能高分子学报》 CAS CSCD 1994年第1期35-41,共7页
以大孔交联聚丙烯酸甲酯为原料,引入多乙烯多胺[H(NHCH2CH2)nNH2,n=2,3,4]配体,络合二价铜离子,合成出一系列以交联聚内烯酸甲酯为载体的多乙烯多胺/铜(Ⅱ)络合物,研究了这类高分子络合物在不同条件下... 以大孔交联聚丙烯酸甲酯为原料,引入多乙烯多胺[H(NHCH2CH2)nNH2,n=2,3,4]配体,络合二价铜离子,合成出一系列以交联聚内烯酸甲酯为载体的多乙烯多胺/铜(Ⅱ)络合物,研究了这类高分子络合物在不同条件下对尿素的吸附性能。结果说明,在载体树脂相同时.配体不同的络合物树脂对尿素的吸附性能有很大差异,以二乙烯三胺或三乙烯四胺为配体,产物树脂对尿素的吸附量较大,而以四乙烯五胺为配体则吸附量较小。在尿素浓度130mg/dl、吸附时间8小时、介质为pH=7的Na2HPO4-NaH2PO4缓冲溶液、温度18℃时,该类高分子络合物对尿素的最大吸附量达到75.2mg/g。 展开更多
关键词 高聚物 吸附 尿素 铜络合物
下载PDF
二(β-羟亚胺)二氯化钛配合物的合成及催化乙烯聚合 被引量:8
14
作者 张丹枫 孙悦 +2 位作者 邓筱娟 陈谦 董宝军 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2012年第9期2121-2128,共8页
报道了3个β-羟亚胺配体(2,6-iPr2C6H3)N C(Ph)CH2CH(Ph)OH(1a),(2,6-iPr2C6H3)N C.(Ph)CH2C(Ph)2OH(1b)和(2,6-iPr2C6H3)N C(Ph)CH2C(C12H8)OH(1c)及其二(β-羟亚胺)二氯化钛配合物[(2,6-iPr2C6H3)N C(Ph)CH2CH(Ph)O]2TiCl2(2a),[(2,6-... 报道了3个β-羟亚胺配体(2,6-iPr2C6H3)N C(Ph)CH2CH(Ph)OH(1a),(2,6-iPr2C6H3)N C.(Ph)CH2C(Ph)2OH(1b)和(2,6-iPr2C6H3)N C(Ph)CH2C(C12H8)OH(1c)及其二(β-羟亚胺)二氯化钛配合物[(2,6-iPr2C6H3)N C(Ph)CH2CH(Ph)O]2TiCl2(2a),[(2,6-iPr2C6H3)N C(Ph)CH2C(Ph)2O]2.TiCl2(2b)和[(2,6-iPr2C6H3)N C(Ph)CH2C(C12H8)O]2TiCl2(2c)的合成,并对其结构进行了表征.在助催化剂甲基铝氧烷(MAO)作用下,以化合物2b为主催化剂,研究了Al/Ti摩尔比、反应时间、温度和聚合压力等对乙烯聚合的影响,发现该催化体系在较宽的反应条件下均可得到很高分子量的聚乙烯,熔点均在140℃左右.以化合物2a~2c为主催化剂对乙烯进行催化聚合,发现在β碳位上取代基的立体位阻对催化剂活性有很大影响.当化合物2b上引入2个苯基取代基时,催化剂显示出最佳催化活性. 展开更多
关键词 β-羟亚胺配体 二(β-羟亚胺)二氯化钛配合物 甲基铝氧烷助催化剂 乙烯聚合
下载PDF
含氧配体钛配合物催化烯烃聚合 被引量:3
15
作者 程正载 张卫星 +2 位作者 龚凯 王洋 毛磊 《精细石油化工》 CAS CSCD 北大核心 2014年第4期72-79,共8页
综述了烯烃聚合用含氧钛配合物最新研究进展。介绍了含氧配体的钛金属配合物结构与催化性能,重点阐述了配体取代基电子效应和空间结构对配合物催化性能的影响,以促进配位聚合催化剂的研究与开发。
关键词 钛配合物 烯烃聚合 配体结构 催化剂
下载PDF
吡咯亚胺配体与过渡金属的反应性及其催化烯烃聚合 被引量:6
16
作者 苏碧云 拓宏兵 张群正 《催化学报》 SCIE CAS CSCD 北大核心 2011年第9期1439-1445,共7页
在经典的Brookhart吡啶双亚胺后过渡金属烯烃聚合催化剂基础上,用吡咯五元环代替吡啶六元环骨架可得到具有不同电子效应的新型吡咯亚胺配体.通过吡咯环特殊的电子效应和位阻效应可设计出种类繁多的有别于吡啶亚胺配体的配合物.综述了吡... 在经典的Brookhart吡啶双亚胺后过渡金属烯烃聚合催化剂基础上,用吡咯五元环代替吡啶六元环骨架可得到具有不同电子效应的新型吡咯亚胺配体.通过吡咯环特殊的电子效应和位阻效应可设计出种类繁多的有别于吡啶亚胺配体的配合物.综述了吡咯亚胺配体与前过渡金属(Ti,Zr等)、后过渡金属(Fe,Co,Ni,Pd等)、稀土金属(Y,Ir,Lu,Nd等)以及其它金属(Cu,U,Cr等)的配位方式、配合物的结构类型、反应性及其催化烯烃聚合反应性能. 展开更多
关键词 吡咯亚胺配体 过渡金属配合物 烯烃聚合 电子效应
下载PDF
烯烃聚合FI催化剂的研究进展 被引量:3
17
作者 程正载 颜晓潮 +2 位作者 雷锐 卢宏芹 聂玉静 《精细石油化工》 CAS CSCD 北大核心 2010年第1期65-71,共7页
综述了FI催化剂近15年的最新研究成果,包括催化剂的合成方法,结构与应用进展.重点阐述了配体上各种取代基电子效应和空间结构与催化乙烯聚合性能的关系,分析了FI钛配合物催化乙烯活性聚合产生的原因,并指出烯烃聚合用FI催化剂发展方向.
关键词 FI 催化剂 钛配合物 乙烯聚合 配体结构 活性聚合
下载PDF
以交联聚丙烯酸甲酯为载体的二乙烯三胺/铜(Ⅱ)络合物的合成及其对尿素的吸附性能 被引量:4
18
作者 何炳林 马建标 宗芳 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1993年第7期1023-1027,共5页
以大孔交联聚丙烯酸甲酯为原料,通过二乙烯三胺胺化和铜络合反应,合成了以交联聚丙烯酸甲酯为载体的二乙烯三胺/铜(Ⅱ)络合物,研究了这类高分子铜络合物在不同条件下对尿素的吸附性能.结果表明,高分子铜络合物对尿素的吸附主要是通过铜(... 以大孔交联聚丙烯酸甲酯为原料,通过二乙烯三胺胺化和铜络合反应,合成了以交联聚丙烯酸甲酯为载体的二乙烯三胺/铜(Ⅱ)络合物,研究了这类高分子铜络合物在不同条件下对尿素的吸附性能.结果表明,高分子铜络合物对尿素的吸附主要是通过铜(Ⅱ)与尿素之间的配位作用进行的.在尿素浓度为130mg/dL,于pH为7的NaH_2PO_4-Na_2HPO_4缓冲溶液中,28℃时吸附4h,以交联聚丙烯酸甲酯为载体的二乙烯三胺/铜(Ⅱ)络合物对尿素的最大吸附量可达71.5mg/g. 展开更多
关键词 二乙烯三胺 配位吸附 铜络合物
下载PDF
后过渡金属镍络合物及其催化烯烃聚合的研究进展 被引量:3
19
作者 贾军纪 朱博超 黄安平 《石油化工》 EI CAS CSCD 北大核心 2005年第11期1108-1113,共6页
对后过渡金属镍络合物及其催化烯烃聚合的研究进展进行综述。按配体的不同,将镍络合物分为4类:P-O配体型、N-O配体型、N-N配体型及P-N配体型。对各类镍络合物的烯烃聚合特点进行了介绍,并给出了部分聚合机理。
关键词 后过渡金属 催化剂 镍络合物 配体 聚合 聚烯烃 聚乙烯 聚丙烯
下载PDF
原子转移自由基聚合体系催化剂的脱除与2,2’-联二吡啶的回收 被引量:5
20
作者 万小龙 应圣康 刘青 《石油化工》 CAS CSCD 北大核心 2000年第8期565-574,共10页
通过原位吸附法 ,首次将用于原子转移自由基聚合的含Cu催化剂从聚合物体系中除去 ,聚合物中Cu的质量分数最低可达 4× 10 - 7,聚合物的收率在 90 %以上。从原位吸附法得到的滤饼中 ,首次将用于原子转移自由基聚合的Cu原子的配位剂 2... 通过原位吸附法 ,首次将用于原子转移自由基聚合的含Cu催化剂从聚合物体系中除去 ,聚合物中Cu的质量分数最低可达 4× 10 - 7,聚合物的收率在 90 %以上。从原位吸附法得到的滤饼中 ,首次将用于原子转移自由基聚合的Cu原子的配位剂 2 ,2’ -联二吡啶通过解吸附和解配位反应获得其水溶液 ,以乙醚作萃取剂从水中萃取 2 ,2’ -联二吡啶 ,其收率最高可达 90 %以上。 展开更多
关键词 原子转移自由基聚合 催化剂 脱除 联二吡啶
下载PDF
上一页 1 2 4 下一页 到第
使用帮助 返回顶部