Polymer-supported spin trap, poly[N-(p-vinylbenzylidene)-t-butylamine N-oxide] (polyPBN), was prepared by using p-chlorostyrene as a starting material, followed by Grignard reaction, condensation with t-butylamine, reduction, polymerization, and oxidation. The adsorption ability of NO2 by polyPBN was investigated in a closed-circulation system. PolyPBN maintains its original NO2 adsorbing ability in the mixed gas of nitrogen and nitrogen dioxide saturated with water vapor even after repeated (5 times) use. However, when the gaseous phase is freed from water, polyPBN exhibits less efficiency to adsorb NO2 and its adsorbing ability decreases gradually with the repeated use.
以对
氯苯乙烯为起始材料,经过格氏反应、与
叔丁胺缩合、还原、聚合和氧化制备了聚合物支撑的自旋阱--聚[N-(对
乙烯基亚苄基)-
叔丁胺 N-氧化物](polyPBN)。研究人员在封闭循环系统中考察了 PolyPBN 对
NO2 的吸附能力。在氮气和饱和
水蒸气的
二氧化氮混合气体中,即使反复使用(5 次),PolyPBN 仍能保持其原有的
二氧化氮吸附能力。然而,当气相中不含
水分时,PolyPBN 对 的吸附效率较低,并且随着重复使用,其吸附能力逐渐下降。