Issue 16, 2017

Two luminescent Zn(ii)/Cd(ii) metal–organic frameworks as rare multifunctional sensors

Abstract

Herein, two new Zn(II)/Cd(II) MOFs, namely {[Zn2(1,4-ndc)2(3-abpt)]·2DMF}n (1) and {[Cd(1,4-ndc)(3-abit)]·H2O}n (2) (1,4-ndc = 1,4-naphthalenedicarboxylic acid, 3-abpt = 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole, 3-abit = 4-amino-3,5-bis(imidazol-1-ylmethyl)-1,2,4-triazole), based on 3-abpt and 3-abit, respectively, containing the same functional group 4-amino-1,2,4-triazole were synthesized and structurally characterized by single crystal and powder X-ray diffractions, elemental analysis, FT-IR spectroscopy, and TGA. X-ray structural analysis reveals that 1 adopts a 2-D 4-connected net with a Schläfli symbol of (44·62) constructed by flywheel-shaped [Zn2(COO)4] dimeric units, 1,4-ndc single bridges, and double bridges composed of 3-abpt and 1,4-ndc. 2 displays a 3-D 2-fold interpenetrated six-connected architecture with a Schläfli symbol of (412·63), fabricated by planar [Cd2(COO)4] dimeric units, 3-abit double bridges, and 1,4-ndc single bridges. 1 and 2 exhibit stronger luminescence as compared to their organic ligands and very rare multifunctional sensing properties. They can selectively and sensitively sense Fe3+ and Al3+ through luminescence quenching and enhancing effect, respectively. Moreover, 1 and 2 show high sensitivity for the detection of TNP than for other nitro aromatics. The mechanisms of 1 and 2 as multifunctional sensors have been preliminarily studied.

Graphical abstract: Two luminescent Zn(ii)/Cd(ii) metal–organic frameworks as rare multifunctional sensors

Supplementary files

Article information

Article type
Paper
Submitted
31 Mar 2017
Accepted
28 Jun 2017
First published
28 Jun 2017

New J. Chem., 2017,41, 8107-8117

Two luminescent Zn(II)/Cd(II) metal–organic frameworks as rare multifunctional sensors

J. Zhang, L. Gong, J. Feng, J. Wu and C. Zhang, New J. Chem., 2017, 41, 8107 DOI: 10.1039/C7NJ01072A

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