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Identification of a rigid and planar D-π-A conjugated system for colorimetric Fe(II) determination and its action mechanism

yanzhengquan 添加于 2017/8/25 20:36:46  1910次阅读 | 0次推荐 | 0个评论

A general and efficient way for enlarging the absorption wavelength of optical materials with high molar absorptivity was explored by incorporating a hydroxyl group ortho-position to a bridging group between the electron-withdrawing and the electron-donating groups. Both theoretical deduction and experimental data indicated that the molecular design strategy was rational and efficacious. Comparing to its analogy, the designed and constructed materials, 3-hydroxyl-4-(N- ethyl-N-ethoxyl phenylazo) naphthalene sulfonic acid (HPNSA), possessed the improved optical property by extending the intrinsic D-π-A conjugated structure and selective recognition to Fe2+ by forming stable 5-member rings. Importantly, the proposed material was effectively applied for colorimetric determination of Fe2+ in four real environmental water samples with a low deviation of 3.5% and an accurate detection limit of 39 nmol∙L−1. The action mechanism between HPNSA and Fe2+ was investigated in detail.

作 者:Zhengquan Yan*, Yuanzhen Li, Yuan Gao, Jiahui Wen, Lei Hu*, Jinmao You*
期刊名称: OPtical Materials
期卷页: 2017 第73卷 第期 393-399页
学科领域:化学科学 » 分析化学 » 光谱分析
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关键词: D-π-A conjugated system; Rigid and planar; Colorimetric determination; Fe(II); Recognization mechanism
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