{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T07:34:12Z","timestamp":1785569652677,"version":"3.56.0"},"reference-count":48,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T00:00:00Z","timestamp":1773446400000},"content-version":"vor","delay-in-days":13,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T00:00:00Z","timestamp":1772323200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["analyticalsciencejournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Luminescence"],"published-print":{"date-parts":[[2026,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    A simple Schiff base probe (\n                    <jats:italic>E<\/jats:italic>\n                    )\u2010\n                    <jats:italic>N\u2032<\/jats:italic>\n                    \u2010(1\u2010(3\u2010oxo\u20103\n                    <jats:italic>H<\/jats:italic>\n                    \u2010benzo[f]chromen\u20102\u2010yl)ethylidene) picolinohydrazide (CHH) was synthesized and characterized by Fourier transform infrared spectroscopy (FT\u2010IR),\n                    <jats:sup>1<\/jats:sup>\n                    H nuclear magnetic resonance spectra (\n                    <jats:sup>1<\/jats:sup>\n                    H NMR),\n                    <jats:sup>13<\/jats:sup>\n                    C nuclear magnetic resonance spectra (\n                    <jats:sup>13<\/jats:sup>\n                    C NMR), and high\u2010resolution mass spectrometry (HR\u2010MS). The probe CHH shows high sensitivity and selectivity for the recognition of Cu\n                    <jats:sup>2+<\/jats:sup>\n                    in EtOH\u2010H\n                    <jats:sub>2<\/jats:sub>\n                    O (1:1, v\/v), and exhibits an enhanced fluorescence phenomenon. The binding constant of CHH for Cu\n                    <jats:sup>2+<\/jats:sup>\n                    is 2.74\u2009\u00d7\u200910\n                    <jats:sup>5<\/jats:sup>\n                    \u2009M\n                    <jats:sup>\u22121<\/jats:sup>\n                    , and the binding stoichiometry of CHH and Cu\n                    <jats:sup>2+<\/jats:sup>\n                    is 1:1. The fluorescence intensity of CHH (10\u2009\u03bcM) is well linearized with the Cu\n                    <jats:sup>2+<\/jats:sup>\n                    concentration at 0\u201310\u2009\u03bcM, and it has a detection limit of 1.42\u2009nM, which is lower than the detection limits of most similar probes. The reusability of the probe was evaluated by successively adding Cu\n                    <jats:sup>2+<\/jats:sup>\n                    and disodium ethylenediaminetetraacetate (Na\n                    <jats:sub>2<\/jats:sub>\n                    EDTA) to the CHH solution. The probe CHH was used to quantitatively detect Cu\n                    <jats:sup>2+<\/jats:sup>\n                    in actual water samples from different water sources. The recovery rates were within an acceptable range, indicating that the probe CHH can be used for the quantitative detection of Cu\n                    <jats:sup>2+<\/jats:sup>\n                    in actual water samples. Furthermore, the probe was applied for fingerprint detection, showing great potential in fingerprint detection and anti\u2010counterfeiting.\n                  <\/jats:p>","DOI":"10.1002\/bio.70466","type":"journal-article","created":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T08:24:14Z","timestamp":1773476654000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A Turn\u2010On Fluorescent Chemical Sensor Based on Benzo[f]Chromen Structure for Cu\n                    <sup>2+<\/sup>\n                    \u2010Sensitive Detection as Well as Applications"],"prefix":"10.1002","volume":"41","author":[{"given":"Qian","family":"Sun","sequence":"first","affiliation":[{"name":"College of Chemistry and Pharmaceutical Engineering Jilin University of Chemical Technology  Jilin City 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