Gujar Varsha, Sangale Vijay, Ottoor Divya
Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411007, India.
J Fluoresc. 2019 Jan;29(1):91-100. doi: 10.1007/s10895-018-2313-5. Epub 2018 Oct 25.
A fluorophore modulation with sodium dodecyl sulphate (SDS) assemblies for the selective and sensitive sensing of Fe ions in aqueous solution is illustrated in this work. Emission spectral characteristics of fluorescent molecule, propranolol (PPH) was intact in presence of metal ions. While on modulation with SDS assemblies, PPH was transformed into a tuneable sensor for Fe ions. This sensor ensemble was not only highly sensitive towards Fe ions in aqueous solution with detection limits lower than 3 μM but also possess high discriminating efficiency in presence of other metal ions like Cu, Pb, Zn, Ni, Fe, Cd, Co, Al, Mg, Hg and Mn. The electrostatic interaction of the anionic group of surfactants with the metal cations significantly increases the communication between metal ions and PPH moiety which results in the quenching of PPH fluorescence. We have employed fluorescence steady state and lifetime studies to understand the metal sensing behaviour of the PPH-SDS sensor system. Principal component analysis (PCA) was used to evaluate the discriminative ability of the developed sensor system towards Fe ions.
本工作展示了一种利用十二烷基硫酸钠（SDS）组装体对荧光团进行调制，用于选择性和灵敏地检测水溶液中Fe离子的方法。荧光分子普萘洛尔（PPH）的发射光谱特性在金属离子存在下保持完整。而在用SDS组装体进行调制时，PPH转变为一种用于Fe离子的可调传感器。该传感器体系不仅对水溶液中的Fe离子高度敏感，检测限低于3 μM，而且在存在Cu、Pb、Zn、Ni、Fe、Cd、Co、Al、Mg、Hg和Mn等其他金属离子时具有高鉴别效率。表面活性剂阴离子基团与金属阳离子的静电相互作用显著增加了金属离子与PPH部分之间的相互作用，从而导致PPH荧光猝灭。我们采用荧光稳态和寿命研究来了解PPH-SDS传感器体系的金属传感行为。主成分分析（PCA）用于评估所开发的传感器体系对Fe离子的鉴别能力。
