| MoO_2Br_2-Al(i-Bu)_2OPhCH_3-Allyl-X体系催化丁二烯聚合的紫外可见吸收光谱 |
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| 引用本文： | 王利峡,陈滇宝,扈梅,方旺喜,唐学明.MoO_2Br_2-Al(i-Bu)_2OPhCH_3-Allyl-X体系催化丁二烯聚合的紫外可见吸收光谱[J].青岛科技大学学报,1992(4). |
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| 作者姓名： | 王利峡 陈滇宝 扈梅 方旺喜 唐学明 |
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| 作者单位： | 青岛化工学院应化系，青岛化工学院高材系，青岛化工学院高材系，青岛化工学院高材系，青岛化工学院高材系 |
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| 摘 要： | 用紫外可见光谱法考察了MoO_2Br_2-Al(i-Bu)_2OPhCH_3(-m)催化体系中添加第三组分-烯丙基卤(A11yl-X),对丁二烯聚合的影响.结果表明,MoO_2Br_2的乙酸乙酯溶液在340nm和780nm处有两个特征吸收峰.其中780nm处归属为Mo(V)的自旋允许d-d跃迁吸收峰.烯丙基卤能与Mo形成π络合物,随Al/Mo增加,其电荷迁移峰由340nm移向380nm,且烯丙基卤和丁二烯可分别与Mo(Ⅲ)形成的π络合物,其特征吸收峰均在380nm处.同时表明,Al(i-Bu)_2OPhCH_3(-m)易与烯丙基溴反应,可使烯丙基溴-Mo(Ⅲ)络合物解络合.
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| 关 键 词： | MoO_2Br_2 紫外可见光谱 烯丙基卤 聚丁二烯 |
Study of Polymerization of Bytadiene with MoO_2Br_2-Al(i-Bu)_2OPhCH_3-Allyl-X Catalyst System by Using UV-VIS Spectroscopy |
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| Wang Lixia.Study of Polymerization of Bytadiene with MoO_2Br_2-Al(i-Bu)_2OPhCH_3-Allyl-X Catalyst System by Using UV-VIS Spectroscopy[J].Journal of Qingdao University of Science and Technology:Natutral Science Edition,1992(4). |
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| Authors: | Wang Lixia |
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| Affiliation: | Wang Lixia Department of Applied ChemistryChen Dianbao; Hu Mei; Fang Wangxi; Tang Xueming Department of Polymer Material Engineering |
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| Abstract: | The effect of adding the third component to MoO_2Br_2-Al(i-Bu)_2 OPhCH_3 catalyst system on the polymerization of butadiene was studied. Theoe were two charactersitic absorption bands respectively at 340 and 780 nm for the ethyl acetate solution with MoO_2Br_2, and the band at 780nm resulted from the spin-allowed d-d transition of Mo(V). The allyl halogen could form π-complex with molybdenum. As the molar ratio of Al/Mo increased, the peak of the characteristic adsorption band of the electric charge transition was shifted from 340nm to 380nm, and for the π-complex of Mo (Ⅲ) it was at 380nm. Al(i-Bu)_2OPhCH_3 was liable to react with Allyl-Br, which would lead to decomplexation of Mo (Ⅲ)-Allyl-Br complex. |
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| Keywords: | MoO_2Br_2 UV-VIS spectrum allyl halogen polybutadiene |
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