A Porous Organic Polymer Nanotrap for Efficient Extraction of Palladium
A Porous Organic Polymer Nanotrap for Efficient Extraction of Palladium
复制标题
DOI：
10.1002/anie.202006596
复制
发表时间：
2020-06-09
影响因子：
16.6
通讯作者：
Ma, Shengqian
中科院分区：
文献类型：
--
作者：
Aguila, Briana;Sun, Qi;Ma, Shengqian
为了抵消铂族元素开采对环境的影响，正在探索回收技术。多孔有机聚合物由于其选择性和耐受恶劣条件的能力而显示出巨大的前景。设计了一系列基于吡啶的POP纳米捕集器，POP-Py，POP-pNH（2）-Py和POP-oNH（2）-Py，并系统地探索了对钯的捕集，钯是最常用的PGEs之一。所有POP纳米陷阱都表现出创纪录的吸收和快速捕获，氨基在提高性能方面至关重要。对POP纳米阱再生和选择性的进一步测试发现，POP-oNH（2）-Py优于POP-pNH（2）-Py。单晶X-射线衍射分析表明，POP-oNH（2）-Py与POP-pNH（2）-Py形成了更强的配合物，这是由于POP-oNH（2）-Py中的氨基与配位氯分子之间存在分子内氢键。这些结果证明了对吸附剂的轻微修改可以使其性能最大化。
To offset the environmental impact of platinum-group element (PGE) mining, recycling techniques are being explored. Porous organic polymers (POPs) have shown significant promise owing to their selectivity and ability to withstand harsh conditions. A series of pyridine-based POP nanotraps, POP-Py, POP-pNH(2)-Py, and POP-oNH(2)-Py, have been designed and systematically explored for the capture of palladium, one of the most utilized PGEs. All of the POP nanotraps demonstrated record uptakes and rapid capture, with the amino group shown to be vital in improving performance. Further testing on the POP nanotrap regeneration and selectivity found that POP-oNH(2)-Py outperformed POP-pNH(2)-Py. Single-crystal X-ray analysis indicated that POP-oNH(2)-Py provided a stronger complex compared to POP-pNH(2)-Py owing to the intramolecular hydrogen bonding between the amino group and coordinated chlorine molecules. These results demonstrate how slight modifications to adsorbents can maximize their performance.