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Fe(Ⅱ)pyridinebisimine complexes activated with trialkylaluminium or modified methylaluminoxane(MMAO)ascatalysts were employed for the polymerization of butyl methacrylate(BMA).Polymer yields,catalytic activities andmolecular weights as well as molecular weight distributions of BMA can be controlled over a wide range by varying thereaction parameters such as cocatalyst,Al/Fe molar ratio,monomer/catalyst molar ratio,monomer concentration and reactiontemperature used in the polymerization.The catalytic activity of Fe(Ⅱ)complex was 11.1 kg_(polym)/mol_(Fe)h and the highestyield could reach 99.1% under optimum condition. 相似文献
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本文以吡啶-4-甲醛缩4-氨基安替比林和Pb(NO3)2为原料,溶剂热法成功合成出了一个新型Pb(Ⅱ)的配合物[Pb(L4)2(NO3)2](L4=吡啶-4-甲醛缩4-氨基安替比林),并通过红外光谱、元素分析、X-粉末衍射、单晶X射线衍射对配合物的单晶结构进行了表征.该配合物属于单斜晶系,空间群Cc,晶胞参数a=2.3842(3) nm,b=0.97378(11) nm,c=1.9611(2) nm,α=90°,β=128.836(9)°,y =90°,V=3.5466(7) nm3,Z=4,Dc=1.715 Mg/m3,F(000) =1808,μ=4.823 mm-1,R1=0.0476,ωR2=0.1158 [I>2σ(I)].室温固态荧光测试显示,配合物在470nm(λmax)具有强的荧光吸收. 相似文献
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