Task-specific design of a hierarchical porous aromatic framework as an ultrastable platform for large-sized catalytic active site binding

Abstract

An amine-tagged hierarchical porous aromatic framework PAF70-NH2 with ultra-stability and narrowly distributed mesopores was synthesized. PAF70-NH2 has high potential for covalently immobilizing a relatively large-sized catalyst inside its pores. This work gave a perfect example of using PAF70-NH2 as a platform for completely recyclable heterogeneous organocatalysis.

Porous aromatic frameworks derived from tetrahedral units

“…通 过 选 择 带 电 荷 的 正 四 面 体 构 筑 单 元 LTIPB, 利用薗头偶联反应与四炔基四苯基甲烷合成 了新型荷电PAFs材料PAF-25 [76] . 新的具有硫脲基团的材料PAF70-thiourea [78] . Progress of iodine release from PAF-25 when the containing iodine PAF materials were immersed in ethanol [76] 具有很高Pd固载量的PAF70-Pd, 该材料在铃木偶联 反应的过程中表现出了极高的催化活性(0.1 mg的催 化剂可以催化产出4.6 g的产品)和显著的择形性 [79] .…”

“…http://engine.scichina.com/doi/10.1360/N972018-00265 评 述 图 8 (网络版彩色)PAF70-NH2, PAF70-thiourea [78] 和PAF70-Pd的合成路线图 [79] Figure 8 (Color online) Synthetic route of PAF70-NH2, PAF70-thiourea [78] and PAF70-Pd [79] 卟啉环与PAFs材料结合, 不仅提供了新的构筑基元, 也增加了材料的功能位点. 通过四硼脂四苯基甲烷 与 四 溴 四 苯 基 卟 啉 的 Suzuki 偶 联 反 应 合 成 了 PAF-76 [80] .…”

Cationic porous aromatic framework with hierarchical structure for selective, rapid and efficient removal of anionic dyes from water

“…So, advanced adsorbents with mesopores or even hierarchical porosity are highly desired. Since the seminal work of microporous PAF-1, advance has been witnessed to construct mesoporous PAFs using pre-modified monomers through increasing the numbers of benzene rings in edge of the diamondoid topology for ammonia capture [31], hydrogen uptake [36], carbon capture [37], and heterogeneous catalysis [38]. However, no work regarding the preparation of charged PAFs with mesopores for dye removal has yet been reported.…”

Porous aromatic framework with mesopores as a platform for a super-efficient heterogeneous Pd-based organometallic catalysis

“…Considering the need for large enough pore space for accommodating Pd-based molecular catalysts and the subsequent catalysis, in this paper, PAF70-NH 2 , an amine-tagged PAF with narrowly distributed mesopores which was recently reported by our group, 55 was selected as the platform for Pd-based organometallic catalysis. In this paper, a strategy involving two post-synthesis modification steps for the introduction of the Pd-based organometallic catalyst into the pores of PAF70-NH 2 was used for the synthesis of our desired material, and the catalytic performance of the desired material ( PAF70-Pd ) was systematically studied.…”