Journal
APPLIED ORGANOMETALLIC CHEMISTRY
Volume 36, Issue 9, Pages -Publisher
WILEY
DOI: 10.1002/aoc.6796
Keywords
cyclohexene oxide; heterometallic complex; ring-opening polymerization
Categories
Funding
- Scientific Research Project of Education Department of Hunan Province [19A068]
- Major Research Project of the Natural Science of the Jiangsu Higher Education Institutions [19KJA360005]
- National Natural Science Foundation of China [22002037]
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Four aluminum, zinc, and aluminum/zinc heterometallic complexes stabilized by o-phenylenediamine bridged poly (phenolato) ligands were synthesized and investigated for their catalytic behavior in the ring-opening polymerization of cyclohexene oxide. Heterometallic complex 4 showed significantly enhanced activity.
Four aluminum, zinc, and aluminum/zinc heterometallic complexes 1-4 stabilized by o-phenylenediamine bridged poly (phenolato) ligands were synthesized and characterized. It was found that the reaction sequence has significant influence on the formation of the Al-Zn heterometallic complex (AlZnLMe)-Me-1 (4), which was prepared through successive complexation of poly (phenol) with ZnEt2 and AlMe3. The catalytic behaviors of complexes 1-4 for the ring-opening polymerization of cyclohexene oxide (CHO) were investigated, and the heterometallic complex 4 showed significantly enhanced activity (TOF up to 410 min(-1)). Kinetic study was conducted; the activation energy (E-a) for formation of PCHO using 4 was determined to be 58.0 +/- 6.5 kJ mol(-1).
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