Lihua Guo,† Kunbo Lian,† Wenyu Kong, Shuai Xu, Guorun Jiang, Shengyu Dai*, Synthesis of Various Branched Ultrahigh-Molecular-Weight Polyethylenes Using Sterically Hindered Acenaphthene-based α-Diimine Ni(II) Catalysts, Organometallics, 2018, DOI: 10.1021/acs.organomet.8b00275