1 Ocak 2019 Dergi makalesi Açık Erişim

Elmas, Sukriye Nihan Karuk; Gunay, Ibrahim Berk; Koran, Kenan; Ozen, Furkan; Aydin, Duygu; Arslan, Fatma Nur; Gorgulu, Ahmet Orhan; Yilmaz, Ibrahim

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    <subfield code="a">An ultrasensitive and selective 'turn off' fluorescent sensor with simple operation for the determination of trace copper (II) ions in water and various beverage samples</subfield>
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    <subfield code="a">Elmas, Sukriye Nihan Karuk</subfield>
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    <subfield code="a">Considering vital roles of trace copper ions for the health of humans, it is critical to sensitively detect it in foodstuffs. Herein, an ultrasensitive and cost-effective coumarin based fluorescent strategy with a "turn-off" signal was developed for specific detection of trace Cu2+ ions. Synthesis of 6,7-dihydroxy-3-(3-methylphenyl)coumarin (TMAC) probe was performed and characterized. The developed fluorescent probe presented excellent selectivity. The limit of detection of the sensor can reach as low as 5.13 nM in ACN/H2O (v/v=95/5) buffered by 5 mu M HEPES buffer at pH = 7.0, and it is below the World Health Organization (WHO) guideline for drinking water (31.5 mu M). The probable stoichiometry of TMAC-Cu2+ complex (1:1) was determined by Job's plot method and confirmed by FT-IR and ESI-MS. We further successfully applied TMAC for Cu2+ detection in water and various beverage samples with good recovery (90.24-109.75 %).</subfield>
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