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

KARUK ELMAS Ş. N., Gunay I. B., Koran K., ÖZEN F., Aydin D., Arslan F. N., ...Daha Fazla

Supramolecular Chemistry, cilt.31, sa.12, ss.756-766, 2019 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 31 Sayı: 12
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1080/10610278.2019.1702195
  • Dergi Adı: Supramolecular Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.756-766
  • Anahtar Kelimeler: beverages, copper, Coumarin, fluorescence sensor, food samples
  • Marmara Üniversitesi Adresli: Evet

Özet

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 μM HEPES buffer at pH = 7.0, and it is below the World Health Organization (WHO) guideline for drinking water (31.5 μM). 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 %).