Laboratoire des Interfaces et Matériaux Avancés (LIMA), Faculté des sciences de Monastir, Avenue de l'environnement, 5000 Monastir, Tunisia.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Nov;115:269-74. doi: 10.1016/j.saa.2013.06.053. Epub 2013 Jun 25.
An optical chemical sensor based on azo-calix[4]arene derivative is developed for the determination of aluminum (III) ions in aqueous solutions. The complex formation ability of azo-calix[4]arene toward metal cations such as Li(I), Cs(I), K(I), Sn(II), Pb(II), Cu(II), Eu(III), Er(III) and Al(III) is investigated by UV-vis spectroscopy. Assessments of results reveal that the azo-calix[4]arene derivative has high affinity to Al(III). The stoichiometric ratio and the association constant were determined as 1:1 and 1.24×10(4)M(-1), respectively for the complex between Al(3+) and the azo-calix[4]arene. The sensing film is fabricated by spin coating on glass plates. Under the optimized conditions, at pH 6.8, the proposed optical sensor displays a linear response to Al(3+) over 10(-7) to 10(-5)M range with response time of 12min. The optical sensor can be regenerated with HNO3 solution. In addition to its high stability and reproducibility, the sensor shows good selectivity for Al(3+) ion.
一种基于偶氮杯[4]芳烃衍生物的光学化学传感器被开发出来，用于测定水溶液中的铝（III）离子。通过紫外可见光谱法研究了偶氮杯[4]芳烃对金属阳离子如 Li（I）、Cs（I）、K（I）、Sn（II）、Pb（II）、Cu（II）、Eu（III）、Er（III）和 Al（III）的络合能力。评估结果表明，偶氮杯[4]芳烃衍生物对 Al（III）具有高亲和力。确定了 Al（3+）与偶氮杯[4]芳烃之间络合物的化学计量比和结合常数分别为 1:1 和 1.24×10（4）M（-1）。通过旋涂在玻璃片上制备传感膜。在优化条件下，在 pH 6.8 下，所提出的光学传感器在 10（-7）至 10（-5）M 范围内对 Al（3+）表现出线性响应，响应时间为 12min。该光学传感器可以用 HNO3 溶液再生。除了高稳定性和重现性外，该传感器对 Al（3+）离子具有良好的选择性。
