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Novel double layer lanthanide metal–organic networks for sensing applications

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Abstract

A trifunctional aromatic building block (H2L) containing three different types of functional groups (carboxyl C([double bond, length as m-dash]O)OH, aldehyde C([double bond, length as m-dash]O)H, and O-ether) was applied for the hydrothermal synthesis of two novel lanthanide 2D coordination polymers [Ln(μ-HL)(μ3-L)(phen)]n {Ln = Tb (1) and Eu (2); H2L = 5-methoxy-(4-benzaldehyde)-1,3-benzene dicarboxylic acid; phen = 1,10-phenanthroline}. Both compounds 1 and 2 are isostructural and reveal very complicated 2D metal–organic double layers with the 3,4L27 topology. The presence of free aldehyde groups positioned outside of the double layers opens up a possibility of using them as functional groups toward sensing amines and small organic molecules. The fluorescence measurements for the Tb derivative 1 reveal that it acts as an efficient fluorescence sensor for p-phenylenediamine, benzidine and acetone molecules via a luminescence quenching effect. A similar sensing behavior was observed for the Eu compound 2. Moreover, thin-films of 1-PEG on glass (1-PEG-glass thin-film material) were fabricated and investigated for the detection of amine vapors.

Graphical abstract: Novel double layer lanthanide metal–organic networks for sensing applications

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Publication details

The article was received on 25 Sep 2017, accepted on 28 Nov 2017 and first published on 28 Nov 2017


Article type: Paper
DOI: 10.1039/C7DT03604C
Citation: Dalton Trans., 2018, Advance Article
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    Novel double layer lanthanide metal–organic networks for sensing applications

    J. Wang, Q. Zhang, W. Dou, A. M. Kirillov, W. Liu, C. Xu, C. Xu, R. Fang and L. Yang, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C7DT03604C

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