{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T10:55:10Z","timestamp":1789469710734,"version":"build-2803163510"},"reference-count":51,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T00:00:00Z","timestamp":1783036800000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"publisher","award":["2016ZRB01AHM"],"award-info":[{"award-number":["2016ZRB01AHM"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["analyticalsciencejournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Luminescence"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Two simple Schiff bases\n                    <jats:bold>\n                      PHMP(\n                      <jats:italic>(E)\u20102\u2010<\/jats:italic>\n                      ((2\u2010(9H\u2010purin\u20106\u2010yl)hydrazono)methyl)phenol)\n                    <\/jats:bold>\n                    and\n                    <jats:bold>\n                      PHMEP(\n                      <jats:italic>(E)\u20102\u2010<\/jats:italic>\n                      ((2\u2010(9H\u2010purin\u20106\u2010yl)hydrazono)methyl)\u20106\u2010ethoxyphenol)\n                    <\/jats:bold>\n                    were designed and synthesized based on 6\u2010hydrazine\u2010purine with salicylaldehyde and 3\u2010ethoxy\u2010salicylaldehyde, respectively. Among them, both\n                    <jats:bold>PHMP<\/jats:bold>\n                    and\n                    <jats:bold>PHMEP<\/jats:bold>\n                    exhibit significant \u201cturn\u2010on\u201d response characteristics when coordinating with Zn\n                    <jats:sup>2+<\/jats:sup>\n                    ions in an EtOH\/H\n                    <jats:sub>2<\/jats:sub>\n                    O buffer solution, demonstrating remarkable selectivity and sensitivity, accompanied by a noticeable color change. Initially, neither probe exhibited significant fluorescence. However, upon forming complexes with Zn\n                    <jats:sup>2+<\/jats:sup>\n                    ,\n                    <jats:bold>PHMP<\/jats:bold>\n                    and\n                    <jats:bold>PHMEP<\/jats:bold>\n                    exhibit bright blue and green fluorescence responses, respectively. In contrast, the ethoxy modification in\n                    <jats:bold>PHMEP<\/jats:bold>\n                    alters its steric hindrance and electron cloud density, resulting in fluorescence signals with both superior selectivity and sensitivity compared with\n                    <jats:bold>PHMP<\/jats:bold>\n                    . Additionally, the newly formed complex\n                    <jats:bold>PHMEP<\/jats:bold>\n                    \u2010Zn\n                    <jats:sup>2+<\/jats:sup>\n                    can serve as a selective \u201cturn\u2010off\u201d fluorescence probe for Cu\n                    <jats:sup>2+<\/jats:sup>\n                    ions. Experimental data indicate that the detection limits of\n                    <jats:bold>PHMP<\/jats:bold>\n                    and\n                    <jats:bold>PHMEP<\/jats:bold>\n                    for Zn\n                    <jats:sup>2+<\/jats:sup>\n                    ions are 1.08\u2009\u00d7\u200910\n                    <jats:sup>\u22128<\/jats:sup>\n                    \u2009M and 8.85\u2009\u00d7\u200910\n                    <jats:sup>\u22129<\/jats:sup>\n                    \u2009M, respectively; the detection limit of\n                    <jats:bold>PHMEP<\/jats:bold>\n                    \u2010Zn\n                    <jats:sup>2+<\/jats:sup>\n                    for Cu\n                    <jats:sup>2+<\/jats:sup>\n                    ions is 1.79\u2009\u00d7\u200910\n                    <jats:sup>\u22128<\/jats:sup>\n                    \u2009M. Job's plot analysis, ESI\u2010MS titration, and theoretical calculations confirmed that the stoichiometric ratio of the probes to the target ions is 1:1. Additionally,\n                    <jats:bold>PHMP<\/jats:bold>\n                    and\n                    <jats:bold>PHMEP<\/jats:bold>\n                    demonstrate broad potential applications in quantitative detection, being suitable for both tap water and convenient test strips.\n                  <\/jats:p>","DOI":"10.1002\/bio.70559","type":"journal-article","created":{"date-parts":[[2026,7,4]],"date-time":"2026-07-04T05:50:58Z","timestamp":1783144258000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["The Comparative Study of Two New 6\u2010Hydrazinylpurine Derivatives as \u201cTurn\u2010On\u201d Fluorescence Chemosensors for the Detection of Zn\n                    <sup>2+<\/sup>"],"prefix":"10.1002","volume":"41","author":[{"given":"Huiping","family":"Zhou","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering University of Jinan  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingyi","family":"Kang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering University of Jinan  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhifeng","family":"Hao","sequence":"additional","affiliation":[{"name":"Yantai Zhaoyi Biochnology Co. 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Yantai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xue","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering University of Jinan  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering University of Jinan  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guangyou","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering University of Jinan  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xueying","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering University of Jinan  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