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Copolymerization of CO2 and epoxides mediated by zinc organyls†
RSC Advances ( IF 3.9 ) Pub Date : 2018-01-18 00:00:00 , DOI: 10.1039/c7ra12535f
Christoph Wulf 1 , Ulrike Doering 1 , Thomas Werner 1
Affiliation  

Herein we report the copolymerization of CHO with CO2 in the presence of various zinc compounds R2Zn (R = Et, Bu, iPr, Cy and Ph). Several zinc organyls proved to be efficient catalysts for this reaction in the absence of water and co-catalyst. Notably, readily available Bu2Zn reached a TON up to 269 and an initial TOF up to 91 h−1. The effect of various parameters on the reaction outcome has been investigated. Poly(ether)carbonates with molecular weights up to 79.3 kg mol−1 and a CO2 content of up to 97% were obtained. Under standard reaction conditions (100 °C, 2.0 MPa, 16 h) the influence of commonly employed co-catalysts such as PPNCl and TBAB has been investigated in the presence of Et2Zn (0.5 mol%). The reaction of other epoxides (e.g. propylene and styrene oxide) under these conditions led to no significant conversion or to the formation of the respective cyclic carbonate as the main product.

中文翻译:

由有机锌介导的 CO2 和环氧化物的共聚†

在此,我们报道了在各种锌化合物R 2 Zn(R = Et、Bu、i Pr、Cy 和Ph)存在下, CHOCO 2 的共聚。在没有水和助催化剂的情况下,几种有机锌被证明是该反应的有效催化剂。值得注意的是,容易获得的Bu 2 Zn 的TON 高达269,初始TOF 高达91 h -1。研究了各种参数对反应结果的影响。获得分子量高达79.3 kg mol -1且CO 2含量高达97%的聚(醚)碳酸酯。在标准反应条件(100 °C,2.0 MPa,16 小时)下,在 Et 2 Zn (0.5 mol%)存在下研究了常用助催化剂(如 PPNCl 和 TBAB)的影响。其他环氧化物(例如氧化丙烯和氧化苯乙烯)在这些条件下的反应没有导致显着的转化或形成各自的环状碳酸酯作为主要产物。
更新日期:2018-01-18
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