Pina-Luis G, Ochoa-Terán A, Rivero I A
Graduate Center and Research of Technological Institute of Tijuana, Tijuana, B.C. México.
J Comb Chem. 2009 Jan-Feb;11(1):83-90. doi: 10.1021/cc8000772.
In this paper, we report the synthesis on Merrifield's resin of alkyl-bis-o-aminobenzamides labeled with a fluorescent dansyl group for use in metal ion recognition. The influence of alkyl groups with different long chains (n = 1, 2, 4, 6) on the spectral fluorescence characteristics was studied. The sensing properties of the beads were evaluated by packing the resins into a flow-through cell for use in a FIA (flow injection analysis)format. Results demonstrated that for those materials with a longer alkyl chain, the fluorescence emission increased upon Li+, Na+, K+, Ca2+, and Mg2+ addition with a higher sensitivity for Mg2+. On the contrary,a fluorescence quenching was observed when Cu2+, Fe3+, or Zn2+ ions were added. The potential applicability of the sensing approach described in this paper for magnesium ions and the sensing response mechanism are outlined.
在本文中，我们报道了在 Merrifield 树脂上合成带有荧光丹磺酰基的烷基双邻氨基苯甲酰胺，用于金属离子识别。研究了不同长链烷基（n = 1、2、4、6）对光谱荧光特性的影响。通过将树脂填充到流通池中以用于流动注射分析（FIA）形式来评估珠子的传感性能。结果表明，对于那些具有较长烷基链的材料，添加 Li +、Na +、K +、Ca2 + 和 Mg2 + 后荧光发射增加，对 Mg2 + 的灵敏度更高。相反，添加 Cu2 +、Fe3 + 或 Zn2 + 离子时观察到荧光猝灭。概述了本文所述传感方法对镁离子的潜在适用性和传感响应机制。
