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In the domain of sensory materials, luminescent metal\u2010organic frameworks (LMOFs) have been considered as a promising candidate owing to their unique host\u2010guest interaction, where MOFs can serve as an ideal scaffold for encapsulating relevant guest molecules rendering specific functionality. In this study, a post\u2010synthetically modified MOF (viz., CuCl<jats:sub>2<\/jats:sub>@MOF\u2010867) was applied to recognize cyanide (CN<jats:sup>\u2212<\/jats:sup>) ions in water via \u201cturn\u2010on\u201d response. The bipyridyl functionalities in MOF\u2010867 were used to perform post\u2010synthetic metalation to infiltrate CuCl<jats:sub>2<\/jats:sub> inside porous architecture of the MOF. Moreover, a CuCl<jats:sub>2<\/jats:sub>@MOF\u2010867 based probe demonstrated highly selective and sensitive aqueous phase recognition of CN<jats:sup>\u2212<\/jats:sup> ions even in the presence of other interfering anions such as Br<jats:sup>\u2212<\/jats:sup>, NO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup>, I<jats:sup>\u2212<\/jats:sup>, SO<jats:sub>4<\/jats:sub><jats:sup>2\u2212<\/jats:sup>, OAc<jats:sup>\u2212<\/jats:sup>, SCN<jats:sup>\u2212<\/jats:sup>, NO<jats:sub>2<\/jats:sub><jats:sup>\u2212<\/jats:sup>, etc. The selective binding of CN<jats:sup>\u2212<\/jats:sup> ions to the copper\u2010metal center has led to the generation of stable Cu(CN)<jats:sub>2<\/jats:sub> species. This phenomenon has further resulted in a fluorescence turn\u2010on response. The aqueous phase cyanide detection by the rationally modified MOF system exhibited very low limit of detection (0.19\u2005\u03bcM), which meets the standardized limit stated by World Health Organization (WHO) that is 1.9\u2005\u03bcM.<\/jats:p>","DOI":"10.1002\/cplu.202100426","type":"journal-article","created":{"date-parts":[[2021,12,1]],"date-time":"2021-12-01T08:51:42Z","timestamp":1638348702000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Selective and Sensitive Fluorescence Turn\u2010On Detection of Cyanide Ions in Water by Post Metallization of a MOF"],"prefix":"10.1002","volume":"87","author":[{"given":"Debanjan","family":"Mahato","sequence":"first","affiliation":[{"name":"Department of Chemistry Indian Institute of Science Education and Research (IISER) Pune  Dr. Homi Bhabha Road Pashan Pune 411008 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sahel","family":"Fajal","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Science Education and Research (IISER) Pune  Dr. Homi Bhabha Road Pashan Pune 411008 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Partha","family":"Samanta","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Science Education and Research (IISER) Pune  Dr. Homi Bhabha Road Pashan Pune 411008 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Writakshi","family":"Mandal","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Science Education and Research (IISER) Pune  Dr. Homi Bhabha Road Pashan Pune 411008 India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1672-4009","authenticated-orcid":false,"given":"Sujit K.","family":"Ghosh","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Science Education and Research (IISER) Pune  Dr. Homi Bhabha Road Pashan Pune 411008 India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,12,13]]},"reference":[{"key":"e_1_2_7_1_1","unstructured":"\u00a0"},{"key":"e_1_2_7_2_2","unstructured":"Guidelines for Drinking-Water Quality World Health Organization Geneva Switzerland 1996;"},{"key":"e_1_2_7_3_2","unstructured":"K.\u2005W. 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