Premium
Vanadyl Di(5‐ t ‐butyl‐2‐(aryliminomethyl)quinolin‐8‐olate): Synthesis, Characterization, and Ethylene (Co‐)Polymerization
Author(s) -
Yan Qing,
Sun Zelin,
Zhang Wenjuan,
Nomura Kotohiro,
Sun WenHua
Publication year - 2014
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201400199
Subject(s) - norbornene , ethylene , chemistry , polymer chemistry , polymerization , toluene , styrene , fourier transform infrared spectroscopy , crystal structure , copolymer , catalysis , polymer , organic chemistry , quantum mechanics , physics
A series of vanadyl di(5‐ t ‐butyl‐2‐(aryliminomethyl)quinolin‐8‐olate) complexes is prepared by the reaction of 5‐ t ‐butyl‐2‐(aryliminomethyl)quinolin‐8‐ol derivatives with a slight excess of VO(OPr) 3 in toluene. All the vanadyl complexes are fully characterized by elemental analysis and FTIR spectroscopy; moreover, the molecular structures of representative complexes C2 and C3 are further confirmed by single‐crystal X‐ray diffraction. On activation with diethylaluminum chloride (Et 2 AlCl) in either the presence or absence of ethyl trichloroacetate (ETA), all the vanadyl complexes exhibit high activities toward ethylene polymerization (up to 1.81 × 10 7 g mol −1 V h −1 ), producing polyethylenes with ultrahigh molecular weights (up to 1.51 × 10 6 g mol −1 ) and narrow polydispersities. The copolymerizations of ethylene with either norbornene or 1‐hexene are also successfully carried out with high activities.