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A novel polydentate Schiff-base derivative developed for multi-wavelength colorimetric differentiation of trace Fe2+ from Fe3+

yanzhengquan 添加于 2017/10/16 22:20:26  1010次阅读 | 0次推荐 | 0个评论

A novel Schiff-base derivative containing polydentate ligands, N-2’-hydroxyl-1’- naphthyl methylene-3-hydroxyl-2-amino pyridine (NNAP), was identified and developed. After its structure was characterized by FTIR, 1H NMR, mass spectra and element analyses, it was noted to find that NNAP displayed multi-wavelength colorimetric responses to Fe2+ and Fe3+, accompanying with differentiable color changes, i.e., from yellow to brown in the presence of Fe2+ while to colorless upon addition of Fe3+. Importantly, the multi-wavelength colorimetric responses to trace Fe2+ and Fe3+, i.e., at 522 nm, 448 nm and 389 nm for Fe2+ detection, and at 448 nm and 389 nm for Fe3+ detection respectively, could efficiently eliminate the system error. Their different action mechanisms, a 1:1 complex mode for NNAP-Fe2+ and 1:2 for NNAP-Fe3+, were proposed and confirmed by means of Job’s plot and theoretical calculation. NNAP would be a practical probe for multi-wavelength colorimetric differentiation of trace Fe2+ from Fe3+.

作 者:Zhengquan Yan*, Yanjie Zhu, Jie Xu, Cong Wang, Yuyu Zheng, Pengyue Li, Lei Hu*, Jinmao You*
期刊名称: Analytical Methods
期卷页: 2017 第9卷 第期 6240–6245页
学科领域:化学科学 » 分析化学 » 光谱分析
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原文链接:http://pubs.rsc.org/en/content/articlelanding/2017/ay/c7ay02167d/unauth#!divAbstract
DOI: DOI: 10.1039/C7AY02167D
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