Abstract
Coordination
polymerization of renewable 3-methylenecyclopentene has been investigated for
the first time using rare-earth metal-based precursors bearing various bulky
ligands. All the prepared complexes catalyze controllable polymerization of
3-methylenecyclopentene into high molecular weight polymers, of which the NPN-
and NSN-tridentate non-Cp ligated lutetium-based catalytic systems exhibited
extremely high activities up to 11?520?kg/(molLu?h) in a dilute toluene solution (3.2?g/100?mL) at room
temperature. The resultant polymers have pure 1,4-regioregularity (>99?%)
and tailorable number average molecular weights (1–20×104) with
narrow molecular weight distributions (polydispersity index (PDI)=1.45–1.79).
DFT simulations were employed to study the polymerization mechanism and
stereoregularity control.
文章鏈接：http://onlinelibrary.wiley.com/doi/10.1002/anie.201700546/full