174829-13-1Relevant articles and documents
Oxygen-Triggered Switchable Polymerization for the One-Pot Synthesis of CO2-Based Block Copolymers from Monomer Mixtures
Zhao, Yajun,Wang, Yong,Zhou, Xingping,Xue, Zhigang,Wang, Xianhong,Xie, Xiaolin,Poli, Rinaldo
, p. 14311 - 14318 (2019)
Switchable polymerization provides the opportunity to regulate polymer sequence and structure in a one-pot process from mixtures of monomers. Herein we report the use of O2 as an external stimulus to switch the polymerization mechanism from the
Stable iridium(iv) complexes supported by tetradentate salen ligands. Synthesis, structures and reactivity
Lee, Chi Lun,Wu, Liangliang,Huang, Jie-Sheng,Che, Chi-Ming
supporting information, p. 3606 - 3609 (2019/03/26)
A series of trans-dichloroiridium(iv)-salen complexes were synthesized and structurally characterized by spectroscopic means and X-ray crystal structures. These Ir(iv) complexes are able to catalyze intramolecular C-H amination of aryl azides. The catalytic amination was drastically accelerated under microwave-assisted conditions, and possibly involves Ir-imido intermediates as supported by high-resolution ESI-MS analysis.
Schiff base iron compound as well as preparation method and application thereof as catalyst
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Paragraph 0090-0092, (2017/12/28)
The invention provides a schiff base iron compound as well as a preparation method and application thereof as a catalyst. The schiff base iron compound provided by the invention is of a structure of formula (I) as shown in the specification, in the formula (I), Y is -CH2-CH2-CH2 or R is -H or alkyl. The schiff base iron compound provided by the invention has the capability of NNOO quadridentation, then a metal activity center binding site is formed, and a quadridentation schiff base iron catalyst is prepared. The schiff base iron compound is used for catalyzing ring opening polymerization of lactide and caprolactone, very high catalysis activity is achieved, meanwhile very high racemize lactide selectivity is achieved, and the regulation of a microcosmic chain structure of a polymerization product is improved. Tests show that the monomer conversion rate of polylactic acid prepared by using the method provided by the invention can be up to 90%, and the monomer conversion rate of polycaprolactone is up to 99%. When the lactide is racemize lactide, the three-dimensional regularity (Pm) of obtained polylactic acid is up to 0.60.