{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T08:50:41Z","timestamp":1773046241084,"version":"3.50.1"},"reference-count":48,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2024,6,9]],"date-time":"2024-06-09T00:00:00Z","timestamp":1717891200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Natural Science Foundation of the Xinjiang Uygur Autonomous Region","award":["2021D01C039"],"award-info":[{"award-number":["2021D01C039"]}]},{"name":"Natural Science Foundation of the Xinjiang Uygur Autonomous Region","award":["BS190203"],"award-info":[{"award-number":["BS190203"]}]},{"name":"PhD research startup foundation of Xinjiang University","award":["2021D01C039"],"award-info":[{"award-number":["2021D01C039"]}]},{"name":"PhD research startup foundation of Xinjiang University","award":["BS190203"],"award-info":[{"award-number":["BS190203"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A thiourea-based colorimetric sensor incorporating polyethyleneimine (PEI) and chromophoric nitrophenyl groups was synthesized and utilized for detecting various anions. Structural characterization of the sensor was accomplished using FTIR and 1H-NMR spectroscopy. The sensor\u2019s interactions and colorimetric recognition capabilities with different anions, including CI\u2212, Br\u2212, I\u2212, F\u2212, NO3\u2212, PF6\u2212, AcO\u2212, H2PO4\u2212, PO43\u2212, and SO42\u2212, were investigated via visual observation and UV\/vis spectroscopy. Upon adding SO42\u2212, F\u2212, and AcO\u2212 anions, the sensor exhibited distinct color changes from colorless to yellow and yellowish, while other anions did not induce significant color alterations. UV\/vis spectroscopic titration experiments conducted in a DMSO\/H2O solution (9:1 volume ratio) demonstrated the sensor\u2019s selectivity toward SO42\u2212, F\u2212, and AcO\u2212. The data revealed that the formation of the main compounds and anion complexes was mediated by hydrogen bonding, leading to signal changes in the nitrophenyl thiourea-modified PEI spectrum.<\/jats:p>","DOI":"10.3390\/s24123751","type":"journal-article","created":{"date-parts":[[2024,6,10]],"date-time":"2024-06-10T08:59:06Z","timestamp":1718009946000},"page":"3751","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Nitrophenyl Thiourea-Modified Polyethylenimine Colorimetric Sensor for Sulfate, Fluorine, and Acetate"],"prefix":"10.3390","volume":"24","author":[{"given":"Kediye","family":"Kuerbanjiang","sequence":"first","affiliation":[{"name":"College of Chemistry, Xinjiang University, Urumqi 830017, China"},{"name":"Chemical Engineering Department, McGill University, Montreal, QC H3A 0C5, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3982-1979","authenticated-orcid":false,"given":"Kuerbanjiang","family":"Rouzi","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"},{"name":"Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur Autonomous Region, Urumqi 830017, China"}]},{"given":"Si-Yu","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3889","DOI":"10.1039\/b822552b","article-title":"Anion recognition by hydrogen bonding: Urea-based receptors","volume":"39","author":"Amendola","year":"2010","journal-title":"Chem. 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