Investigation of redox switchable titanium and zirconium catalysts for the ring opening polymerization of cyclic esters and epoxides,Inorganic Chemistry Frontiers

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Investigation of redox switchable titanium and zirconium catalysts for the ring opening polymerization of cyclic esters and epoxides
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-09-22 00:00:00 , DOI: 10.1039/c7qi00227k
Miranda Y. Lowe _{1,

2,

3,

3,

4} , Sisheng Shu _{1,

2,

3,

3,

4} , Stephanie M. Quan _{1,

2,

3,

3,

4} , Paula L. Diaconescu _{1,

2,

3,

3,

4}

Affiliation

The synthesis and characterization of (thiolfan*)Zr(O^tBu)₂ (thiolfan* = 1,1′-di(2,4-di-tert-butyl-6-thiophenoxide)ferrocene) is reported, as well as its activity toward the ring-opening polymerizations of L-lactide and ε-caprolactone. With the titanium analogue, (thiolfan*)Ti(OⁱPr)₂, diblock copolymers (AB and BA) and a triblock copolymer (ABA) were synthesized in a one-pot, redox-controlled process. Changing the metal center from titanium to zirconium has a profound influence on the reactivity profile of the corresponding reduced and oxidized catalysts in the switchable ring opening polymerization of cyclic esters and ethers.

中文翻译：

用于环酯和环氧化物开环聚合的氧化还原可切换钛和锆催化剂的研究

报道了（thiolfan *）Zr（O ^t Bu）₂（thiolfan * = 1,1'-二（2,4-二叔丁基-6-噻吩氧基）二茂铁）的合成与表征活性对L-丙交酯和ε-己内酯的开环聚合反应。使用钛类似物（thiolfan *）Ti（O ⁱ Pr）₂，以一锅法，氧化还原控制的方法合成了二嵌段共聚物（AB和BA）和三嵌段共聚物（ABA）。将金属中心从钛变为锆，对环酯和醚的可切换开环聚合中相应还原和氧化的催化剂的反应活性影响很大。

更新日期：2017-11-08

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