Department of Chemistry, Xinxiang Medical University, Jinsui Road 601, Xinxiang, Henan 453003, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Feb 15;103:276-81. doi: 10.1016/j.saa.2012.11.027. Epub 2012 Nov 28.
Based on thiourea moiety, three colorimetric and fluorescent anion probes have been synthesized. Results indicated the probe 1 containing p-NO(2) group showed the strongest binding ability for AcO(-) among the anions tested (F(-), AcO(-), H(2)PO(4)(-), Cl(-), Br(-), I(-)), which was not influenced by the existence of other anions. The interaction of host-guest was accompanied with a dramatic color change from colorless to orange. However, the addition of various anions did not cause noticeable spectral response of the probes (2 and 3) containing o, m-NO(2) groups. Theoretical investigation demonstrated the electron transition of the highest LUMO aroused the red-shift phenomenon in UV-vis spectra of 1-anion.
基于硫脲部分，我们合成了三种用于比色和荧光检测阴离子的探针。结果表明，含对硝基的探针 1 对 AcO(-)具有最强的结合能力，而对其他阴离子（F(-)、AcO(-)、H(2)PO(4)(-)、Cl(-)、Br(-)、I(-)）则没有明显的影响。主客体相互作用伴随着从无色到橙色的剧烈颜色变化。然而，加入各种阴离子并没有引起含邻、间硝基探针（2 和 3）的光谱有明显的响应。理论研究表明，最高占据分子轨道（HOMO）的电子跃迁引起了 1-阴离子在紫外可见光谱中的红移现象。
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