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A gadolinium MOF acting as a multi-responsive and highly selective luminescent sensor for detecting o-, m-, and p-nitrophenol and Fe3+ ions in the aqueous phase

机译:一种钆MOF作为多响应性和高选择性发光传感器,用于检测水相中的O-,M-和P-硝基苯酚和Fe3 +离子

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A microporous Gd-MOF, [Gd _(6) (L) _(3) (HL) _(2) (H _(2) O) _(10) ]·18H _(2) O· x (solvent) ( 1 ), has been successfully synthesized by a solvothermal reaction between Gd(NO _(3) ) _(3) ·6H _(2) O and the multidentate π-conjugated ligand, H _(4) L, which has a Lewis basic pyridyl site (H _(4) L = 5,5′-(pyridine-2,5-diyl)-isophthalic acid). The crystal structure shows that compound 1 consists of Gd _(3) units, which are further interlinked by multicarboxylate ligands to form a 2D network. A solid sample of 1 emits bright blue light, which can be assigned to H _(4) L ligand-centered emission. Interestingly, the luminescence of finely ground particles of 1 dispersed in water shows high sensitivity and selectivity towards trace amounts of o -, m -, and p -nitrophenol (NP) and Fe ~(3+) ions with good linearity, which indicates that 1 can be used as a multi-responsive luminescence sensor for the detection of o -, m -, and p -NP and Fe ~(3+) ions in an aqueous system.
机译:微孔GD-MOF,[GD _(6)(L)_(3)(HL)_(HL)_(2)(H _(2)O)_(10)]·18H _(2)O·X(溶剂)(1),已经通过Gd(NO _(3))_(3)·6H _(2)O和多型π-缀合配体,H _(4)L之间的溶剂热反应成功地合成了Lewis碱性吡啶基位点(H _(4)L = 5,5' - (吡啶-2,5-二基) - 中间邻苯二甲酸)。晶体结构表明,化合物1由Gd _(3)单位组成,其通过多羧酸酯配体进一步相互连接以形成2D网络。固体样品为1发出明亮的蓝光,可以分配给H _(4)L配体中心的发射。有趣的是,分散在水中的1个细地颗粒的发光显示出高敏感性和对痕量的O - ,M - 和p-硝基苯酚(NP)和Fe〜(3+)离子的选择性具有良好的线性度,这表明了这一点图1可用作多响应发光传感器,用于检测水系统中的O - ,M - 和P-NP和Fe〜(3+)离子。

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