| Organolanthanide Compounds Containing Methanesulfonate and Pyrazinamide Ligand in Styrene Polymerization |
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| 作者姓名： | Josué Garcia Quini Alessandra de Souza Maia Renata Diana Miotti Tereza Silva Martins Wanda de Oliveira |
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| 作者单位： | Josué Garcia Quini（Instituto de Química, Universidade de Sao Paulo, CP 26077, 05513-970, Sao Paulo-SP, Brazil） ;
Alessandra de Souza Maia（Instituto de Química, Universidade de Sao Paulo, CP 26077, 05513-970, Sao Paulo-SP, Brazil） ;
Renata Diana Miotti（Instituto de Química, Universidade de Sao Paulo, CP 26077, 05513-970, Sao Paulo-SP, Brazil） ;
Tereza Silva Martins（Instituto de Química, Universidade de Sao Paulo, CP 26077, 05513-970, Sao Paulo-SP, Brazil） ;
Wanda de Oliveira（Instituto de Química, Universidade de Sao Paulo, CP 26077, 05513-970, Sao Paulo-SP, Brazil） ; |
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| 基金项目： | Project supported by the Fundacao de Amparo à Pesquisa do Estado de Sao Paulo and CNPq Conselho Nacional de Desenvolvimento Científico e Tecnológico |
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| 摘 要： | The synthesis of organolanthanide compounds identified as LnCp*(MS)2PzA, Ln=Sm, Tb, Yb (MS=methanesulfonate, Cp*=pentamethylcyclopentadienyl, and PzA=pyrazinamide), by the reaction of coordination compounds Ln(MS)3(PzA)4 with NaCp in THF was reported. The complexes were formulated according to elemental analyses, complexometric titration with EDTA (%Ln), and 1H NMR. IR spectroscopy revealed that PzA coordinates with lanthanide(Ⅲ) ions and methanesulfonate coordinates via oxygen atoms in a non-equivalent manner. In preliminary catalytic studies, these compounds were active in styrene polymerization that used MAO as a cocatalyst with an activity of 12.3 kg PS mol Sm-1h-1. Differential scanning calorimetry (DSC) of polystyrene showed that the polymer was mainly atactic.
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| 关 键 词： | 苯乙烯 聚合作用 有机镧系化合物 甲基磺酸盐 吡嗪酰胺 配位体 |
| 文章编号： | 1002-0721（2007）02-0135-04 |
| 收稿时间： | 12 July 2006 |
Organolanthanide Compounds Containing Methanesulfonate and Pyrazinamide Ligand in Styrene Polymerization |
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| Josu Garcia , Alessandra de Souza Maia, Renata Diana Miotti, Tereza Silva Martins,Wanda de Oliveira.Organolanthanide Compounds Containing Methanesulfonate and Pyrazinamide Ligand in Styrene Polymerization[J].Journal of Rare Earths,2007,25(2):135-138. |
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| Authors: | Josu Garcia Alessandra de Souza Maia Renata Diana Miotti Tereza Silva Martins Wanda de Oliveira |
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| Affiliation: | aInstituto de Quimica, Universidade de Säo Paulo, CP 26077, 05513-970, Säo Paulo-SP, Brazil |
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| Abstract: | The synthesis of organolanthanide compounds identified as LnCp* (MS)2PzA, Ln = Sm, Tb, Yb (MS = methanesulfonate, Cp* = pentamethylcyclopentadienyl, and PzA = pyrazinamide), by the reaction of coordination compounds Ln (MS)3(PzA)4 with NaCp in THF was reported. The complexes were formulated according to elemental analyses. complexometric titration with EDTA (%Ln), and 1H NMR. IR spectroscopy revealed that PzA coordinates with lanthanide (III) ions and methanesulfonate coordinates via oxygen atoms in a non-equivalent manner. In preliminary catalytic studies, these compounds were active in styrene polymerization that used MAO as a cocatalyst with an activity of 12.3 kg PS molSm−1h−1. Differential scanning calorimetry (DSC) of polystyrene showed that the polymer was mainly atactic. |
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| Keywords: | organolanthanides pentamethylcyclopentadienyl methanesulfonate pyrazinamide styrene polymerization rare earths |
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