A novel porous organic polymer that incorporates NNN pincer type of ligand, i. e., 2,6‐Bis(pyrazol‐3‐yl)pyridine, (3‐bpp‐POP) is prepared via solvent‐knitting method. Through the characterizations, 3‐bpp‐POP is demonstrated to possess abundant porous structure, high surface area, and excellent thermal durability. A ruthenium molecular catalyst immobilized on the 3‐bpp‐POP support exhibits substantial catalytic performance for the hydrogenation of LA to GVL with an initial turnover frequency (TOF) of 1680 h⁻¹ and a maximum turnover number (TON) of 14762 over 24 h for LA conversion with selectivities of 91.1 % for GVL and 8.9 % for HPA. The catalyst demonstrated excellent durability during successive recycles without leaching Ru3+, which ascribe to the strong binding of pincer ligand to metal centers.

中文翻译：

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NNN夹钳官能化的多孔有机聚合物负载的Ru（III）作为非均相催化剂，用于将乙酰丙酸加氢为γ-戊内酯

一种新型的多孔有机聚合物，结合了NNN钳型配体，即 例如，2,6-双（吡唑-3-基）吡啶（3-bpp-POP）是通过溶剂编织法制备的。通过表征，证明3-bpp-POP具有丰富的多孔结构，高表面积和出色的耐热性。固定在3-bpp-POP载体上的钌分子催化剂在LA氢化为GVL方面表现出显着的催化性能，在24小时内的初始周转频率（TOF）为1680 h ^-1，最大周转数（TON）为14762。对于LA转化，GVL的选择性为91.1％，HPA的选择性为8.9％。该催化剂在连续的循环过程中显示出优异的耐久性，而没有浸出Ru3 +，这归因于钳位配体与金属中心的牢固结合。