Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India.
Talanta. 2010 Apr 15;81(1-2):714-21. doi: 10.1016/j.talanta.2010.01.005. Epub 2010 Jan 11.
The first guanine-based difunctional colorimetric receptor 8-[(4-nitrophenyl)azo]guanine (receptor 1) was designed, synthesized and characterized by IR, UV-vis, (1)H NMR and mass spectrometric analysis. The synthesized receptor 1 was able to recognize Cu(II), Zn(II) and acetate ion through visible color changes in its DMSO and DMSO-H(2)O (95:5, v/v) solution. The binding affinity of the receptor 1 with the chosen analytes has been estimated in terms of binding constants through non-linear fittings of corresponding UV-vis titration data while the binding mode of the same was studied through (1)H NMR spectral studies.
首次设计、合成并通过红外光谱（IR）、紫外可见光谱（UV-vis）、（1）H 核磁共振谱（1H NMR）和质谱分析（mass spectrometric analysis）对基于鸟嘌呤的双功能比色受体 8-[(4-硝基苯基)偶氮]鸟嘌呤（受体 1）进行了表征。所合成的受体 1 能够通过其 DMSO 和 DMSO-H(2)O（95:5，v/v）溶液中的可见颜色变化识别 Cu(II)、Zn(II)和乙酸根离子。通过非线性拟合相应的紫外可见滴定数据，根据结合常数来估计受体 1 与所选分析物的结合亲和力，同时通过（1）H NMR 光谱研究来研究其结合模式。
