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The target compounds are successfully synthesized in yields of 50\u201390% and characterized by <jats:sup>1<\/jats:sup>H\u2010NMR, <jats:sup>13<\/jats:sup>C\u2010NMR, and HRMS. The compound with an amino picolyl group (<jats:bold>P1<\/jats:bold>) exhibits an excellent selectivity toward Cu(II) ion as the fluorescent signal shifts from 433 to 630\u2009nm. From a fluorescence titration experiment, the limit of detection for Cu(II) ion is estimated as 0.19\u2009\u00b5m. The fluorescence spectral shift by Cu(II) ion is reliant on the use of acetonitrile as a co\u2010solvent, and the results from cyclic voltammetry and UV\u2010Vis spectroscopy suggest that the sensing mechanism involves a coordination complex between the <jats:bold>P1<\/jats:bold>, acetonitrile and Cu(II) ion. Furthermore, this <jats:bold>P1<\/jats:bold>\u2010Cu complex can also be used as a selective fluorescent sensor for PO<jats:sub>4<\/jats:sub><jats:sup>3\u2212<\/jats:sup> ion with a detection limit of 0.44\u2009\u00b5m.<\/jats:p>","DOI":"10.1111\/php.13569","type":"journal-article","created":{"date-parts":[[2021,12,3]],"date-time":"2021-12-03T17:24:15Z","timestamp":1638552255000},"page":"856-863","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Ratiometric Fluorescent Sensor for Copper(II) and Phosphate Ions from Aminopyrene Derivatives"],"prefix":"10.1111","volume":"98","author":[{"given":"Voravin","family":"Asavasuthiphan","sequence":"first","affiliation":[{"name":"Department of Chemistry Faculty of Science Chulalongkorn University  Bangkok Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roongkan","family":"Nuisin","sequence":"additional","affiliation":[{"name":"Department of Environmental Science Faculty of Science Chulalongkorn University  Bangkok Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Charoenkwan","family":"Kraiya","sequence":"additional","affiliation":[{"name":"Department of Chemistry Faculty of Science Chulalongkorn University  Bangkok Thailand"},{"name":"Electrochemistry and Optical Spectroscopy Center of Excellence Department of Chemistry Faculty of Science Chulalongkorn University  Bangkok Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mongkol","family":"Sukwattanasinitt","sequence":"additional","affiliation":[{"name":"Department of Chemistry Faculty of Science Chulalongkorn University  Bangkok Thailand"},{"name":"Nanotec\u2010CU Center of Excellence on Food and Agriculture Department of Chemistry Faculty of Science Chulalongkorn University  Bangkok Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7993-7968","authenticated-orcid":false,"given":"Paitoon","family":"Rashatasakhon","sequence":"additional","affiliation":[{"name":"Department of Chemistry Faculty of Science Chulalongkorn University  Bangkok Thailand"},{"name":"Nanotec\u2010CU Center of Excellence on Food and Agriculture Department of Chemistry Faculty of Science Chulalongkorn University  Bangkok Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,12,13]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1006\/eesa.1999.1820"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1128\/AEM.67.11.5325-5327.2001"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1186\/2193-1801-2-498"},{"key":"e_1_2_5_5_1","first-page":"519","article-title":"Toxicity effects of fish histopathology on copper accumulation","volume":"41","author":"Padrilah S. 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