Gillis J N, Sievers R E, Pollock G E
Department of Chemistry, University of Colorado, Boulder 80309, USA.
Anal Chem. 1985 Jul;57(8):1572-7. doi: 10.1021/ac00285a017.
Porous polymers containing various metal chelates bonded to nitrogen functionalities on the surface of the polymer have been synthesized and found to bind oxygen reversibly. The stationary phases containing [5,5'-(1,2-ethanediyldinitrilo)-bis(2,2,7-trimethyl-3-octanonato)]cobalt(II) were found to be the most suitable of the phases investigated for separating oxygen for argon, nitrogen, and carbon monoxide. At ambient temperatures, near 25 degrees C, the reversible interaction of molecular oxygen with the transition-metal complex bonded to the stationary phase results in a marked increase in the retention time of oxygen, relative to species that have similar retention times in columns that do not contain the metal chelate. The stationary phase can be used alone to achieve the separation of low molecular weight gases or in series with another column. The metal chelate stationary phase is selective for oxygen and little change in the retention time of oxygen is observed after hundreds of injections over a several-month period, indicating that no appreciable degradation of the stationary phase had taken place under these conditions.
已合成出含有与聚合物表面氮官能团键合的各种金属螯合物的多孔聚合物，并发现其能可逆地结合氧气。含有[5,5'-(1,2 - 乙二腈二腈基)-双(2,2,7 - 三甲基 - 3 - 辛酮酸)]钴(II)的固定相被发现是所研究的用于分离氧气与氩气、氮气和一氧化碳的固定相中最合适的。在环境温度下，接近25摄氏度时，分子氧与键合到固定相上的过渡金属络合物的可逆相互作用导致氧气的保留时间相对于在不含金属螯合物的柱中具有相似保留时间的物质显著增加。该固定相可单独用于实现低分子量气体的分离，或与另一根柱子串联使用。金属螯合物固定相对氧气具有选择性，并且在几个月的时间内进行数百次进样后，氧气的保留时间几乎没有变化，这表明在这些条件下固定相没有发生明显降解。
