Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran.
J Fluoresc. 2011 Jul;21(4):1509-13. doi: 10.1007/s10895-011-0837-z. Epub 2011 Feb 1.
A novel and simple fluorescence enhancement method for selective pyrophosphate(PPi) sensing was proposed based on a 1:1 metal complex formation between bis(8-hydroxy quinoline-5-solphonat) chloride aluminum(III) (Al(QS)(2)Cl), (L) and PPi in aqueous solution. The linear response range covers a concentration range of 1.6 × 10(-7) to 1.0 × 10(-5) mol/L of PPi and the detection limit of 2.3 × 10(-8) mol/L. The association constant of L-PPi complex was calculated 2.6 × 10(5) L/mol. L was found to show selectively and sensitively fluorescence enhancement toward PPi over than I(3)(-), NO(3)(-), CN(-), CO(3)(2-), Br(-), Cl(-), F(-), H(2)PO4(-) and SO(4)(2-), which was attributed to higher stability of inorganic complex between pyrophosphate and L.
基于在水溶液中双(8-羟基喹啉-5-磺酸钠)氯化铝(III)(Al(QS)(2)Cl)(L)与焦磷酸(PPi)之间 1:1 的金属络合形成,提出了一种新颖而简单的荧光增强方法,用于选择性检测焦磷酸(PPi)。该方法的线性响应范围涵盖了浓度范围为 1.6×10(-7)至 1.0×10(-5)mol/L 的 PPi,检测限为 2.3×10(-8)mol/L。L-PPi 络合物的缔合常数计算为 2.6×10(5)L/mol。L 被发现对 PPi 表现出选择性和灵敏的荧光增强,而对 I(3)(-)、NO(3)(-)、CN(-)、CO(3)(2-)、Br(-)、Cl(-)、F(-)、H(2)PO4(-)和 SO(4)(2-)没有响应,这归因于焦磷酸盐和 L 之间形成的无机络合物具有更高的稳定性。