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Highly sensitive fluorometric detection of Zn2+ ion by calix[4]arene derivative appended 4-biphenylcarbonitrile
Dyes and Pigments ( IF 4.5 ) Pub Date : 2017-12-30 , DOI: 10.1016/j.dyepig.2017.12.057
Serkan Erdemir , Begum Tabakci

A novel calix[4]arene derivative bearing 4-biphenylcarbonitrile unit (CCP) was developed for the selective fluorescent sensing of Zn2+ with a discriminating enhancement of 14-folds over the other metal ions. CCP exhibited highly selective and sensitive fluorescence “off-on” recognition to Zn2+ with a 1:1 binding stoichiometry in aqueous solution (EtOH/H2O, 8/2, v/v). The binding constant was calculated as 3.50 × 105 M−1 with detection limit of 0.31 μM, which presented a pronounced sensitivity toward Zn2+ ion. To check its applicability, an easy prepared test paper strip of CCP was made for rapid and selective detection of Zn2+. Also, the determination of Zn2+ in water samples was evaluated. Otherwise, the results demonstrated that the binding between CPP and Zn2+ is chemically reversible in presence of only cysteine among the various amino acids and anions, resulting in “on–off” type sensing of cysteine.



中文翻译:

杯[4]芳烃衍生物附加的4-联苯甲腈高灵敏的荧光法检测Zn 2+离子

开发了带有4-联苯甲腈单元(CCP)的新型杯[4]芳烃衍生物,用于Zn 2+的选择性荧光传感,具有比其他金属离子高14倍的辨别性。CCP在水溶液(EtOH / H 2 O,8/2,v / v)中以1:1的化学计量比对Zn 2+表现出高度选择性和灵敏的荧光“关闭”识别。结合常数为3.50×10 5  M -1,检测极限为0.31μM,对Zn 2+离子具有明显的灵敏度。为了检查其适用性,制备了易于制备的CCP试纸条,用于快速,选择性地检测Zn 2+。另外,锌的测定评估了水中样品中的2+。否则,结果表明,在各种氨基酸和阴离子中仅存在半胱氨酸的情况下,CPP和Zn 2+之间的结合是化学可逆的,从而导致“开-关”型半胱氨酸的检测。

更新日期:2017-12-30
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