在正方形格子协调网络中引发客的相切换,以实现p-xylen的选择性吸附
Shi-Qiang Wang1, Catiúcia R M O Matos2, Shaza Darwish2
1Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Republic of Singapore.
ACS applied materials & interfaces
|June 27, 2025
概括
灵活的协调网络 (CNs) 对碳化合物分离有希望. 这项研究揭示了特定的CN在烯吸附时如何发生结构变化,从而导致高度选择性的对烯分离.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 晶体学 晶体学是指结晶学.
背景情况:
- 灵活的协调网络 (CNs) 是由于客人诱导的结构转型而对选择性碳化合物分离有希望的.
- 了解这些转换背后的机制对于优化吸附剂性能至关重要.
- 现有的吸附剂往往缺乏复杂碳化合物混合物所需的选择性.
研究的目的:
- 为了研究烯吸附时方格 (sql) 协调网络 [Cu(4,4'-双) 2 ((CF3CO2) 2) n (sql-1-Cu-CF3CO2) 的相切换行为.
- 阐明结构与性质关系,这些关系决定了本CN中烯异构体的选择性.
- 为了比较这个CN的性能与商业吸附剂.
主要方法:
- 简化和描述sql协调网络.
- 使用二元和三元烯混合物 (p-烯,o-烯,m-烯) 的竞争性吸附研究.
- 单晶X射线衍射测定烯载荷相的结构.
主要成果:
- 协调网络对p-xylen (PX) 具有较高的选择性,而不是o-xylen (OX) 和m-xylen (MX).
- 鉴定出了三种不同的烯载荷相,其孔隙尺寸和孔隙度各不相同.
- 负载PX的阶段显示最小的空虚空间,但最强的主机-客户互动,驱动PX选择性.
结论:
- 调查的协调网络显示,对于从混合物中分离p-烯的异常选择性.
- 客人诱导的结构转变,特别是相位切换,是观察到高选择性的关键.
- 这种材料为工业碳化合物分离提供了传统吸附剂的有希望的替代品.
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