一种基于茜素红S-铝（III）配合物的水溶性荧光氟离子探针。
A water-soluble fluorescent fluoride ion probe based on Alizarin Red S-Al(III) complex.
作者信息
Sai Sathish R, Ravi Kumar M, Nageswara Rao G, Anil Kumar K, Janardhana C
机构信息
Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prashanthi Nilayam, AP 515134, India.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Feb;66(2):457-61. doi: 10.1016/j.saa.2006.03.023. Epub 2006 Apr 3.
A new water-soluble fluorescent fluoride ion signaling system has been developed based on the ligand exchange mechanism in aqueous medium. This procedure is based on the exchange of two Alizarin Red S (ARS) molecules coordinated to Al(III) by fluoride ion without interference from other common anions. The binary complex of ARS with Al(III) provides a sensitive signaling system for fluoride ion in the concentration range from 5x10(-6) to 3x10(-4) M. The ligand exchange reaction of ARS-Al(III) complex with fluoride ion has been investigated by UV-vis and fluorescence spectroscopies combined with the AM1 semi-empirical quantum chemical calculations. The pale orange fluorescence (lambdamax=575 nm) exhibited by the complex upon excitation at 435 nm decreases in intensity with fluoride addition with a detection limit of 0.1 mg L-1.
基于水相中配体交换机理，开发了一种新型水溶性荧光氟离子信号系统。该方法基于氟离子与两个与铝（III）配位的茜素红S（ARS）分子进行交换，不受其他常见阴离子干扰。ARS与铝（III）的二元配合物为浓度范围在5×10⁻⁶至3×10⁻⁴ M的氟离子提供了一个灵敏的信号系统。结合AM1半经验量子化学计算，通过紫外可见光谱和荧光光谱研究了ARS - 铝（III）配合物与氟离子的配体交换反应。该配合物在435 nm激发下呈现的浅橙色荧光（λmax = 575 nm），随着氟化物的加入，荧光强度降低，检测限为0.1 mg L⁻¹。
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