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Trimetallic complex {[Fe<jats:sup>II<\/jats:sup>(dmbpy)(CN)<jats:sub>4<\/jats:sub>]\u2010[Pt<jats:sup>II<\/jats:sup>(DMSO)Cl]<jats:sub>2<\/jats:sub>\u2010[Ru<jats:sup>II<\/jats:sup>(bpy)<jats:sub>2<\/jats:sub>(CN)<jats:sub>2<\/jats:sub>]} (<jats:bold>1<\/jats:bold>; dmbpy=4,4\u2032\u2010dimethyl\u20102,2\u2032\u2010bipyridine, bpy=2,2\u2032\u2010bipyridine) was synthesized as a task\u2010specific catalyst to initially reduce and degrade methomyl to CH<jats:sub>3<\/jats:sub>SH\/CH<jats:sub>3<\/jats:sub>NH<jats:sub>2<\/jats:sub>\/CH<jats:sub>3<\/jats:sub>CN\/CO<jats:sub>2<\/jats:sub>. The thus\u2010produced CH<jats:sub>3<\/jats:sub>SH interacts with the trimetallic complex to displace the <jats:italic>cis<\/jats:italic>\u2010[Ru<jats:sup>II<\/jats:sup>(bpy)<jats:sub>2<\/jats:sub>(CN)<jats:sub>2<\/jats:sub>] luminophore for monitoring. Other pesticides, including organophosphates and similar carbamate pesticides, remained intact under the same catalytic conditions; a selective sensing signal is only activated when <jats:bold>1<\/jats:bold> recognizes methomyl. Furthermore, <jats:bold>1<\/jats:bold> can be applied to detect methomyl in real water samples. In the luminescent mode of the assay, the method detection limit (MDL) of <jats:bold>1<\/jats:bold> for methomyl (LD<jats:sub>50<\/jats:sub>=17\u2005mg\u2009kg<jats:sup>\u22121<\/jats:sup>) was 1.12\u2005mg\u2009L<jats:sup>\u22121<\/jats:sup>.<\/jats:p>","DOI":"10.1002\/chem.202002882","type":"journal-article","created":{"date-parts":[[2020,7,31]],"date-time":"2020-07-31T00:21:44Z","timestamp":1596154904000},"page":"14461-14466","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Selective Detection of Methomyl Pesticide by a Catalytic Chemosensing Assay"],"prefix":"10.1002","volume":"26","author":[{"given":"Anxun","family":"Zheng","sequence":"first","affiliation":[{"name":"Department of Science and Environmental Studies The Education University of Hong Kong  10 Lo Ping Road Tai Po Hong Kong SAR P. R. 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