Asaba Hiroki, Iwasaki Takanori, Hatazawa Masahiro, Deng Jingyuan, Nagae Haruki, Mashima Kazushi, Nozaki Kyoko
Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
Inorg Chem. 2020 Jun 15;59(12):7928-7933. doi: 10.1021/acs.inorgchem.0c01156. Epub 2020 Jun 3.
Heteromultimetallic complexes consisting of three Co(II) ions and one lanthanide ion were synthesized and applied to the alternating copolymerization of CO and cyclohexene oxide. Unlike the conventional cobalt(III) salen complexes, the high thermal stability of the present catalyst allowed us to reach a turnover number of 13000, one of the highest values ever reported for multimetallic systems. The chain propagation was first-order to the catalyst, suggesting a cooperative behavior of the metal centers.
合成了由三个钴（II）离子和一个镧系离子组成的异多金属配合物，并将其应用于一氧化碳和环氧环己烷的交替共聚反应。与传统的钴（III）席夫碱配合物不同，本催化剂的高热稳定性使我们能够达到13000的转换数，这是多金属体系报道的最高值之一。链增长对催化剂呈一级反应，表明金属中心具有协同作用。
