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Issue 15, 2019
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Two triphenylamine-based luminescent metal–organic frameworks as a dual-functional sensor for the detection of nitroaromatic compounds and ofloxacin antibiotic

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Abstract

Two Zn2+-based luminescent metal–organic frameworks containing the same components, {[Zn(TIPA)pim0.5]2H2O·NO3}n (1) and {[Zn(TIPA)(pim)]3H2O}n (2) have been synthesized based on a π-electron rich semi-rigid triangular ligand TIPA (TIPA = tris(4-(1H-imidazol-1-yl)-phenyl)amine and H2pim = pimelic acid). 1 is a two-fold interpenetrating 3D framework containing four chiral (10,3)-a subnets, and 2 is merely a 2D + 2D → 2D entangled network, although they were synthesized from the same starting materials. A photoluminescence investigation revealed that the emissions of 1 and 2 entirely originate from the intraligands charge transfer transitions (π → π*). Metal–organic framework 1 can be applied as a dual functional chemical sensor for nitroaromatic (NAC) compounds and antibiotics detection with a high sensitivity and quick response. In addition, the effective detection of nitroaromatic compounds and antibiotics was rationalized by the density functional theory (DFT) calculation of the energy bands of the NAC compounds and antibiotics, which revealed that a photoinduced electron transfer mechanism is largely responsible for the sensing of nitroaromatic compounds, and the resonance energy transfer is largely responsible for the exclusive sensing of ofloxacin (OFX).

Graphical abstract: Two triphenylamine-based luminescent metal–organic frameworks as a dual-functional sensor for the detection of nitroaromatic compounds and ofloxacin antibiotic

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Supplementary files

Article information


Submitted
15 Dec 2018
Accepted
08 Feb 2019
First published
28 Feb 2019

CrystEngComm, 2019,21, 2559-2570
Article type
Paper

Two triphenylamine-based luminescent metal–organic frameworks as a dual-functional sensor for the detection of nitroaromatic compounds and ofloxacin antibiotic

X. Yao, G. Xiao, H. Xie, D. Qin, H. Ma, J. Liu and P. Yan, CrystEngComm, 2019, 21, 2559
DOI: 10.1039/C8CE02122H

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