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Identification and separation of xylene isomers (PX, MX, and OX) at room temperature based on the different relative positions of two methyl groups on the benzene ring is an unprecedented attempt. Herein, 1\u2010aminopyrene polymer (PAP) is designed and electro\u2010synthesized composited with a supporting electrolyte as an adsorbent for the separation of xylene isomers using a multi\u2010stage dispersed liquid\u2013solid adsorption process at room temperature. Each \u2212NH\u2212pyrene\u2212NH\u2212 unit can form a force field to identify and discriminate xylene isomer through \u03c0\u2013\u03c0 interaction combined with \u2212CH<jats:sub>3<\/jats:sub>\u00b7\u00b7\u00b7\u2212NH\u2212 interactions of different strength, thereby achieving separation of PX, MX, and OX isomers by amplifying the slight differences in the adsorption capacity and diffusion rates. The density functional theory (DFT) simulations provide a more quantitative analysis of the adsorbate\u2010adsorbent interactions to illustrate PX &gt; MX &gt; OX order of adsorption selectivity. This study may offer an alternative strategy for the precise designing of energy\u2010efficient and adsorption\u2010based separation materials.<\/jats:p>","DOI":"10.1002\/smll.202407842","type":"journal-article","created":{"date-parts":[[2024,10,21]],"date-time":"2024-10-21T06:58:23Z","timestamp":1729493903000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Energy\u2010Efficient Separation of Xylene Isomers through Stacked 1\u2010Aminopyrene Polymer Composite"],"prefix":"10.1002","volume":"20","author":[{"given":"Boning","family":"Yan","sequence":"first","affiliation":[{"name":"Department of Chemistry Zhejiang University  Hangzhou 310058 P. R. 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