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However, their presence at trace levels and high polarity hinders their selective enrichment and accurate quantification. To address this, we ingeniously devised and constructed a novel crown ether functionalized magnetic microporous organic network (Fe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    @CE\u2010MON) as an efficient adsorbent for magnetic solid\u2010phase extraction (MSPE) of trace chlorophenols from complex aqueous matrices. Synthesized by coupling brominated 18\u2010crown\u20106 ether with aromatic alkynyl groups, Fe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    @CE\u2010MON integrates the conjugated MON framework, molecular recognition capability of crown ether cavities, and magnetic responsiveness of Fe\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    nanoparticles, achieving selective chlorophenols enrichment via hydrophobic, \u03c0\u2010\u03c0 stacking, and hydrogen bonding interactions. After systematically optimizing key MSPE parameters, a sensitive MSPE\u2010high\u2010performance liquid chromatography\u2010ultraviolet method was established, featuring low detection limits (0.3\u20130.5 \u00b5g L\n                    <jats:sup>\u22121<\/jats:sup>\n                    ), a wide linear range (1.0\u2013500 \u00b5g L\n                    <jats:sup>\u22121<\/jats:sup>\n                    ), excellent reproducibility, and superior enrichment efficiency. This is the first example of fabricating crown ether\u2010based MMON for MSPE, providing a rapid and sensitive method for monitoring trace chlorophenols in complex environmental waters. It also expands MON monomer diversity and highlights the potential of combining supramolecule crown ether with porous MONs in sample pretreatment.\n                  <\/jats:p>","DOI":"10.1002\/jssc.70443","type":"journal-article","created":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T12:34:23Z","timestamp":1778589263000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Fabrication of Novel Magnetic Crown Ether\u2010based Microporous Organic Network for Efficient Magnetic Solid\u2010Phase Extraction of Polar Chlorophenols From Environmental Water Samples"],"prefix":"10.1002","volume":"49","author":[{"given":"Chun\u2010Ying","family":"Xu","sequence":"first","affiliation":[{"name":"School of Pharmaceutical Sciences &amp; Institute of Materia Medica, State Key Laboratory of Advanced Drug Delivery and Release Systems, Medical Science and Technology Innovation Center Shandong First Medical University &amp; Shandong Academy of Medical Sciences Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiao\u2010Yao","family":"Meng","sequence":"additional","affiliation":[{"name":"School of Pharmaceutical Sciences &amp; Institute of Materia Medica, State Key Laboratory of Advanced Drug Delivery and Release Systems, Medical Science and Technology Innovation Center Shandong First Medical University &amp; Shandong Academy of Medical Sciences Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuan\u2010Yuan","family":"Cui","sequence":"additional","affiliation":[{"name":"School of Pharmaceutical Sciences &amp; Institute of Materia Medica, State Key Laboratory of Advanced Drug Delivery and Release Systems, Medical Science and Technology Innovation Center Shandong First Medical University &amp; Shandong Academy of Medical Sciences Jinan Shandong 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