Systematic Investigation of High‐Sensitivity Luminescent Sensing for Polyoxometalates and Iron(III) by MOFs Assembled with a New Resorcin[4]arene‐Functionalized Tetracarboxylate |
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| Authors: | Dr. Shuai‐Tong Zhang Dr. Jin Yang Prof. Dr. Hua Wu Dr. Ying‐Ying Liu Prof. Dr. Jian‐Fang Ma |
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| Affiliation: | 1. Key Laboratory of Polyoxometalate Science, Department of Chemistry, Northeast Normal University, Changchun 130024 (P.R. China), Fax: (+86)?431‐85098620;2. College of Science, Nanjing Agricultural University, Nanjing 210095 (P.R. China) |
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| Abstract: | A new family of resorcin[4]arene‐based metal–organic frameworks (MOFs), namely, [Eu(HL)(DMF)(H2O)2] ? 3 H2O ( 1 ), [Tb(HL)(DMF)(H2O)2] 3 H2O ( 2 ), [Cd4(L)2(DMF)4(H2O)2] 3 H2O ( 3 ) and [Zn3(HL)2(H2O)2] 2 DMF ? 7 H2O ( 4 ), have been constructed from a new resorcin[4]arene‐functionalized tetracarboxylic acid (H4L=2,8,14,20‐tetra‐ethyl‐6,12,18,24‐tetra‐methoxy‐4,10,16,22‐tetra‐carboxy‐methoxy‐calix[4]arene). Isostructural 1 and 2 exhibit charming 1D motifs built with the cup‐like HL3? anions and rare earth cations. Compounds 3 and 4 show a unique sandwich‐based 2D layer and a fascinating 3D framework, respectively. Remarkably, compounds 1 and 2 display intensive red and green emissions triggered by the efficient antenna effect of organic ligands under UV light. More importantly, systematic luminescence studies demonstrate that Ln‐MOFs 1 and 2 , as efficient multifunctional fluorescent materials, show highly selective and sensitive sensing of Fe3+, polyoxometalates (POMs), and acetone, which represents a rare example of a sensor for quantitatively detecting three different types of analytes. This is also an exceedingly rare example of Fe3+ and POMs detection in aqueous solutions employing resorcin[4]arene‐based luminescent Ln‐MOFs. Furthermore, the possible mechanism of the sensing properties is deduced. |
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| Keywords: | crystal structure iron luminescence metal– organic frameworks polyoxometalates sensors |
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