Key Laboratory of Analysis and Detection Technology for Food Safety, Ministry of Education & Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fuzhou, P R China.
Org Lett. 2011 Mar 4;13(5):1162-5. doi: 10.1021/ol200024g. Epub 2011 Feb 9.
A novel squaraine-based chemosensor SQ-1 has been synthesized, and its sensing behavior toward various metal ions was investigated by UV-vis and fluorescence spectroscopies. In AcOH-H(2)O (40:60, v/v) solution, Hg(2+) ions coordinate with SQ-1 causing a deaggregation which induces a visual color and absorption spectral changes as well as strong fluorescence. In contrast, the addition of other metals (e.g., Pb(2+), Cd(2+), Cu(2+), Zn(2+), Al(3+), Ni(2+), Co(2+), Fe(3+), Ca(2+), K(+), Mg(2+), Na(+), and Ag(+)) does not induce these changes at all. Thus SQ-1 is a specific Hg(2+) sensing agent due to the inducing deaggregation of the dye molecule by Hg(2+).
一种新型的基于 squaraine 的化学传感器 SQ-1 已被合成，并通过紫外可见光谱和荧光光谱研究了其对各种金属离子的传感行为。在 AcOH-H(2)O（40:60，v/v）溶液中，Hg(2+) 离子与 SQ-1 配位导致解聚，这导致了视觉颜色和吸收光谱的变化以及强烈的荧光。相比之下，加入其他金属（例如 Pb(2+)、Cd(2+)、Cu(2+)、Zn(2+)、Al(3+)、Ni(2+)、Co(2+)、Fe(3+)、Ca(2+)、K(+)、Mg(2+)、Na(+)和 Ag(+))根本不会引起这些变化。因此，由于 Hg(2+) 诱导染料分子解聚，SQ-1 是一种特定的 Hg(2+) 传感试剂。
