Topological control of 3,4-connected frameworks based on the Cu<sub>2</sub>-paddle-wheel node:<b>tbo</b>or<b>pto</b>, and why?
作者:Philipp Müller、Ronny Grünker、Volodymyr Bon、Martin Pfeffermann、Irena Senkovska、Manfred S. Weiss、Xinliang Feng、Stefan Kaskel
DOI:10.1039/c6ce01513a
日期:——
Two trigonal tritopic ligands with different conformational degree of freedom: conformationally labile H3tcbpa (tris((4-carboxyl)phenylduryl)amine) and conformationally obstructed H3hmbqa (4,4′,4′′-(4,4,8,8,12,12-hexamethyl-8,12-dihydro-4H-benzo[9,1]quino-lizino[3,4,5,6,7-defg]acridine-2,6,10-triyl)tribenzoic acid) are assembled with square-planar paddle-wheel nodes with the aim of selective engineering of the frameworks with tbo and pto underlying net topologies. In the case of H3tcbpa, both topological types were obtained forming non-interpenetrated MOFs namely DUT-63 (tbo) and DUT-64 (pto). Whereas synthesis of DUT-63 proceeds under typical conditions, formation of DUT-64 requires an additional topology directing reagent (topological modifier). Solvothermal treatment of the conformationally hindered H3hmbqa ligand with the Cu-salt results exclusively in DUT-77 material, based on the single pto net. The possibility to insert the salen based metallated pillar ligand into networks with pto topology post-synthetically results in DUT-78 and DUT-79 materials (both ith-d) and opens new horizons for post-synthetic insertion of catalytically active metals within the above-mentioned topological type of frameworks.
两种具有不同构象自由度的三齿三位配体:构象不稳定的 H3tcbpa(tris((4-羧基)苯基)胺)和构象受阻的 H3hmbqa(4,4′,4′′-(4,4,8,8,12,12-六甲基-8,12-二氢-4H-苯并[9,1]喹啉-2,6,10-三基)三苯甲酸)被组装成平方平面桨轮节点,旨在选择性地工程化具有 tbo 和 pto 基础网络拓扑的框架。在 H3tcbpa 的情况下,两种拓扑类型都被获取,形成非交错的金属有机框架(MOFs),即 DUT-63(tbo)和 DUT-64(pto)。而 DUT-63 的合成在典型条件下进行,DUT-64 的形成则需要额外的拓扑导向试剂(拓扑修饰剂)。构象受阻的 H3hmbqa 配体与铜盐的溶剂热处理仅产生基于单一 pto 网的 DUT-77 材料。后合成将基于沙伦的金属化柱状配体插入具有 pto 拓扑的网络中,结果得到了 DUT-78 和 DUT-79 材料(均为 ith-d),并为上述拓扑类型框架的后合成插入催化活性金属开辟了新的前景。