期刊
DALTON TRANSACTIONS
卷 47, 期 29, 页码 9627-9633出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt01923a
关键词
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资金
- NSF of China [21701033]
- Innovative Entrepreneurial Training Plan of undergraduates in Guangdong Province [201710571005, 201710571007, 201710571012, 201710571016, 201710571008, 201710571020, 201710571060]
- Innovation experiment project of Guangdong Medical University [ZYDM024]
- Special Funds for Scientific and Technological Innovation of undergraduates in Guangdong Province [pdjha0218, pdjha0219, pdjha0226]
- CSIR, New Delhi [01(2899)/17/EMR-II]
The articulate combination of intriguing functional groups and luminescence properties can deliver metal-organic frameworks (MOFs) with multifarious applications viz. selective and specific sensing of nitroaromatic compounds (NACs), an important constituent of explosives, as well as sensing of toxic metal ions. In this regard, a new d(10) configuration based Zn(II) metal-organic framework (MOF) {(NH2(CH3)(2))[Zn-4(ddn)(2)(COO)(H2O)(4)]center dot solvent}(n) (1) has been synthesized using a pi-conjugated and rigid multicarboxylate ligand 3,5-di(3,5-dicarboxylphenyl)nitrobenzene (H(4)ddn). 1 displays a 3D (3,4,6)-c connected net which is based on two types of binuclear [Zn-2(mu(2)-COO)(2)(mu(1)-COO)(2)] and [Zn-2(mu(2)-COO)(4)] clusters. Sensing studies of 1 to detect nitro-aromatic compounds reveal highly specific detection of 2,4-dinitophenol (DNP) with remarkable quenching (K-SV = 8.93 x 10(3) M-1) and a low limit of detection (LOD: 1.12 ppm). The luminescence quenching mechanism in the case of 1 in the presence of NACs has been ascribed to the concurrent presence of the charge transfer as well as the weak interaction between the MOF and NACs. The activated framework of 1 also displayed highly selective detection of ferric ions with K-SV = 1.13 x 10(4) M-1 with a low limit of detection (LOD: 1.24 ppm).
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