A range of confined iminopyridine iron complexes with skeleton of 8-(arylimino)-5,6,7-trihydroquinolyl have been prepared and well characterized by HRMS spectroscopy, FT-IR spectroscopy as well as elemental analysis. These iron complexes (Fe1–Fe5) serve as highly efficient pre-catalysts for conjugated dienes polymerization. By adjusting substituents of ligand framework, the stereoselectivity about 1,4-cis/trans could be switched from <1/99 to 96/4. An outstanding polymerization activity up to 10⁸ g mol⁻¹ h⁻¹ was achieved with high molecular weight by employing Fe1 as pre-catalyst under optimum experimental conditions. What's more, the Fe1/MAO catalytic system showed excellent thermostability, which could lead to full conversion even at 100 °C within 10 min. Surprisingly, the polymerization activities of bio-based monomer β-farnesene and β-myrcene were able to reach 10⁶ g mol⁻¹ h⁻¹ by Fe-1/MAO catalytic system, which was the highest activity of iron complex family to deliver the “green rubbers” with high molecular weights.

已经制备了一系列具有 8-(芳基亚氨基)-5,6,7-三氢喹啉骨架的受限亚氨基吡啶铁配合物，并通过 HRMS 光谱、FT-IR 光谱以及元素分析对其进行了很好的表征。这些铁配合物（Fe1-Fe5）可作为共轭二烯聚合的高效预催化剂。通过调整配体骨架的取代基，1,4-顺式/反式的立体选择性可以从<1/99切换到96/4。通过在最佳实验条件下使用Fe1作为预催化剂，以高分子量实现了高达10 ⁸  g mol ^-1  h ^-1的出色聚合活性。此外，Fe1/MAO 催化体系表现出优异的热稳定性，即使在 100°C 下也能在 10 分钟内实现完全转化。令人惊讶的是，生物基单体β-法呢烯和β-月桂烯在Fe-1 /MAO 催化体系下的聚合活性能够达到 10 ⁶  g mol ^-1  h ^-1，这是铁络合物家族中活性最高的具有高分子量的“绿色橡胶”。