Yan Zhengquan, Zhao Qi, Wen Meijun, Hu Lei, Zhang Xuezhong, You Jinmao
School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China; Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu 273165, China.
School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China; Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu 273165, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2017 Nov 5;186:17-22. doi: 10.1016/j.saa.2017.06.007. Epub 2017 Jun 6.
A novel polydentate ligand chromophore, 3,6-di-(N-ethyl-N-ethoxyl phenylazo) acridine (EEPA), was identified and synthesized. After its structure was characterized by FTIR, H NMR, mass spectra and element analyses, it was noted to find that there was a simultaneously colorimetric response to Ag and Fe accompanying with different color changes, i.e., from brown to light purple for Ag and further to purple-red for Fe, respectively. Their different action mechanisms, a 1:2 complex mode for EEPA-Ag and 1:1 for EEPA-Fe, were investigated and confirmed by means of Job's plot and theoretical calculation. EEPA would be a potential colorimetric chemo-dosimeter for simultaneous detection of Ag and Fe with the detection limits of 1.6nmol·L and 69nmol·L, respectively.
一种新型多齿配体发色团，即3,6-二（N-乙基-N-乙氧基苯基偶氮）吖啶（EEPA），被鉴定并合成出来。通过傅里叶变换红外光谱（FTIR）、核磁共振氢谱（¹H NMR）、质谱和元素分析对其结构进行表征后，发现它对银和铁同时有比色响应，伴随不同颜色变化，即银使颜色从棕色变为浅紫色，铁则使颜色进一步变为紫红色。通过乔布氏曲线（Job's plot）和理论计算研究并证实了它们不同的作用机制，EEPA与银形成1:2的络合模式，与铁形成1:1的络合模式。EEPA有望成为一种潜在的比色化学剂量计，用于同时检测银和铁，检测限分别为1.6nmol·L⁻¹和69nmol·L⁻¹。
