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A novel Zn(II)\u2010complex, applicable as a fluorescent chemosensor for CN<jats:sup>\u2212<\/jats:sup> recognition, was synthesized in excellent yields from the reaction of zinc sulfate with the novel hydrazone: 3\u2010(amino\u20109H\u2010purin\u2010yl)\u2010<jats:italic>N<\/jats:italic>\u2032\u2010(hydroxybenzylidene) propanehydrazide. The structures of the hydrazone (<jats:bold>L<\/jats:bold>) and the zinc\u2013hydrazone complex (<jats:bold>L.Zn<\/jats:bold>) were characterized by ultraviolet\u2010visible spectrophotometry, Fourier\u2010transform infrared spectrometry, mass spectrometry, proton\u2010 and carbon\u201013\u2010nuclear magnetic resonance. The sensing performance of the proposed chemosensors, <jats:bold>L<\/jats:bold> and <jats:bold>L.Zn<\/jats:bold>, towards common ions was investigated via naked\u2010eye studies as well as absorption and emission spectral analysis. Hydrazone (<jats:bold>L<\/jats:bold>) efficiently functioned as a fluorescence sensor for aluminum ions (Al<jats:sup>3+<\/jats:sup>) and zinc ions (Zn<jats:sup>2+<\/jats:sup>) with large binding constants, and exhibited colorimetric and fluorometric responses for several basic anions: OH<jats:sup>\u2212<\/jats:sup>, CO<jats:sub>3<\/jats:sub><jats:sup>2\u2212<\/jats:sup>, HCO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup>, HSO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup>, CH<jats:sub>3<\/jats:sub>COO<jats:sup>\u2212<\/jats:sup> and CN<jats:sup>\u2212<\/jats:sup>. However, <jats:bold>L.Zn<\/jats:bold> showed quick, sensitive and specific enhancement of fluorescence intensity towards CN<jats:sup>\u2212<\/jats:sup> anion, and a linear relationship was observed as the concentration of CN<jats:sup>\u2212<\/jats:sup> varied from 1 to 14\u2009\u03bcM. The detection limit was determined to be 0.14\u2009\u03bcM, which is lower than the 1.9\u00a0\u03bcM maximum value recommended by the World Health Organization for drinking water. The practical performance of the sensor was successfully demonstrated using various environmental water samples spiked with cyanide ion.<\/jats:p>","DOI":"10.1002\/bio.4102","type":"journal-article","created":{"date-parts":[[2021,6,5]],"date-time":"2021-06-05T09:59:12Z","timestamp":1622887152000},"page":"1608-1620","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Selective and sensitive turn on fluorescence cyanide recognition in aqueous medium based on Zn(II)\u2013hydrazone metal complex chemosensor"],"prefix":"10.1002","volume":"36","author":[{"given":"Kamal H.","family":"Bouhadir","sequence":"first","affiliation":[{"name":"Department of Chemistry, Faculty of Arts and Sciences American University of Beirut  Beirut Lebanon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jomana","family":"Elaridi","sequence":"additional","affiliation":[{"name":"Department of Natural Sciences, School of Arts and Sciences Lebanese American University  Beirut Lebanon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6100-3182","authenticated-orcid":false,"given":"Ghassan","family":"Sonji","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Faculty of Arts and Sciences American University of Beirut  Beirut Lebanon"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,6,26]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1080\/21553769.2014.933716"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.3390\/w11112380"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1039\/C4SC03992K"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1097\/PAF.0000000000000241"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00706-017-1977-x"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1186\/s40550-017-0061-y"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1093\/jat\/24.4.266"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.13005\/ojc\/300115"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1039\/C8AY02401D"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10895-010-0796-9"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.3390\/molecules22111842"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10895-018-2334-0"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.hydromet.2010.12.008"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1080\/10942912.2014.885044"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2007.02.083"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00216-012-6360-5"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.20964\/2017.12.26"},{"key":"e_1_2_6_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhazmat.2010.09.026"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00604-017-2366-1"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0003-2670(99)00745-X"},{"key":"e_1_2_6_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jbiotec.2015.09.001"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00604-006-0679-6"},{"key":"e_1_2_6_24_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.envpol.2017.04.052"},{"key":"e_1_2_6_25_1","doi-asserted-by":"publisher","DOI":"10.7776\/ASK.2016.35.6.473"},{"key":"e_1_2_6_26_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ecoenv.2010.02.018"},{"key":"e_1_2_6_27_1","doi-asserted-by":"publisher","DOI":"10.1039\/an9921701009"},{"key":"e_1_2_6_28_1","doi-asserted-by":"publisher","DOI":"10.1039\/C8RA09943J"},{"key":"e_1_2_6_29_1","doi-asserted-by":"publisher","DOI":"10.1039\/C8AY00308D"},{"key":"e_1_2_6_30_1","doi-asserted-by":"publisher","DOI":"10.3390\/molecules24152711"},{"key":"e_1_2_6_31_1","doi-asserted-by":"publisher","DOI":"10.1021\/ac501024d"},{"key":"e_1_2_6_32_1","doi-asserted-by":"publisher","DOI":"10.1080\/13102818.2019.1608302"},{"key":"e_1_2_6_33_1","first-page":"45","volume":"9","author":"Al\u2010Zaidi B. 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