Multifunctional Luminescent Eu(III)-Based Metal–Organic Framework for Sensing Methanol and Detection and Adsorption of Fe(III) Ions in Aqueous Solution

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• 作者：Jian Wang ; Min Jiang ; Ling Yan ; Ren Peng ; Mengjie Huangfu ; Xinxin Guo ; Yang Li ; Pengyan Wu
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：December 19, 2016
• 年：2016
• 卷：55
• 期：24
• 页码：12660-12668
• 全文大小：648K
• ISSN：1520-510X

文摘

A novel lanthanide–organic framework (Eu–HODA), consisting of 2,2′,3,3′-oxidiphthalic acids as efficient sensitizing units, is assembled and characterized. Eu–HODA features rare chiral helical channels despite the achiral nature of H₄ODA. It is found that this MOF shows a unique luminescent response to methanol, in contrast to n-propanol and ethanol. Eu–HODA reveals a turn-off luminescence switching initiated by acetone molecules with an EC₅₀ of 0.03 vol %, which is below the occupational exposure limit of acetone stipulated by the American Conference of Governmental Industrial Hygienists. Furthermore, it also exhibits high sensitivity (Stern–Volmer constant K_SV = 2.09 × 10⁴ L/mol) and low detection limit (6.4 ppb) for Fe³⁺ ions in pure water because of the existence of uncoordinated carboxyl groups within open frameworks. Eu–HODA-based test paper provides a simple and reliable detection method for Fe³⁺ in practical applications.