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Development of a homogenous assay based on fluorescent imprinted nanoparticles for analysis of nitroaromatic compounds

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Nano Research 2019年第12期12卷 3044-3050页

作者： Asma Elbelazi Francesco Canfarotta Joanna Czulak Michael J.Whitcombe Sergey Piletsky Elena Piletska Chemistry Department University of LeicesterLEI 7RHLeicesterUK Chemistry Department University of TripoliTripoliLibya MIP Diagnostics Ltd. Colworth Science ParkShambrookBedfordMK441LQUK

Herein we describe the development of a homogeneous assay for the detection of 4-nitroaniline(4-NA)and 2,4-dinitroaniline(2,4-diNA).Thisassay relies on fluorescent molecularly imprinted nanoparticles(nano MIPs)which,upon interaction with the target analytes,generate areduction in fluorescence emission intensity(quenching).This is due to a resp on sive fluorescent monomer(N-2-propenyl-(5-dimethylamino)-1-naphthalene sulphonamide)employed in the manufacture of the nanoMIPs which,by virtue of the imprinting process,is capable of selectiveinteraction with the target an alyte,thus giving rise to a quenching *** experiments showed excellent recognition propertiestoward the target *** optimal conditions,the fluorescence intensity of these nano MIPs decreased as the concentration of theimprinted analyte increased from 10 nM to 2.71 pM.A linear relation between the negative logarithm of 4-NA or 2,4-diNA concentrations and the fluorescence intensity for both nanosystems was found(R^2=0.991 and R^2=0.9895),with excellent sensitivity(limit of detection(LOD)=7 and 6 nM,respectively).Furthermore,both nanosystems have been successfully applied for detection of 4-NA or 2,4-diNA in tap water,withrecoveries between 90%to 100.6%and 92%to 100.3%,*** to the versatility of the imprinting process,this nanosystemholds the potential for further development of several optical sensors for many other compounds.

关键词： molecularly imprinted polymers quenching homogeneous assay nitroaromatic compounds

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Ligand controlled structure of cadmium(Ⅱ) metal-organic frameworks for fluorescence sensing of Fe^(3+) ion and nitroaromatic compounds

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Chinese Chemical Letters 2019年第3期30卷 801-805页

作者： Xia Wang Weidong Fan Ming Zhang Yizhu Shang Yutong Wang Di Liu Hailing Guo Fangna Dai Daofeng Sun School of Materials Science and Engineering College of Science China University of Petroleum (East China) College of Chemical and Environmental Engineering Shandong University of Science and Technology State Key Lahoratory of Heavy Oil Processing China University of Petroleum (East China)

Three cadmium(II) metal-organic frameworks(MOFs) based on tetracarboxylate ligands, namely[Cd_2(TTTA)(DMF)_3]·2 DMF(1),[Cd_2(TB)(H_2O)_4]·3DMF·H_2O(2)and [Cd(TEB)_(0.5)].2 DMF.4 H_2O(3) have been designed and synthesized. Complex 1 is a 2-dimensional(2 D) 3,4-connected network with 3,4 L13 topology, complex 2 features a 3-dimensional(3D) 3,4-connected tfa topology with a 2-fold interpenetrating structure and complex 3 has a 3D 4-connected dia topology with a 4-fold interpenetrating structure. Interestingly, 2 exhibits permanent pores and selective adsorption of CO_2 over CH_4. In addition, 2 shows fluorescence sensing of Fe^(3+) ion and rapid detection of nitroaromatic compounds(NACs) through fluorescence quenching.

关键词： Metal-organic frameworks Selective adsorption Fluorescence sen sing Fe^3+ ion nitroaromatic compounds

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Two alkynyl functionalized Co（Ⅱ）-MOFs as fluorescent sensors exhibiting selectivity and sensitivity for Fe3+ and nitroaromatic compounds

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Chinese Chemical Letters 2019年第7期30卷 1440-1444页

作者： Yue Li Xia Wang Chengyong Xing Xiurong Zhang Zelong Liang Xiaokang Wang Kai Zhang Yutong Wang Di Liu Weidong Fan Fangna Dai School of Materials Science and Engineering College of Science China University of Petroleum(East China) Qingdao 266580 China College of Chemical Engineering China University of Petroleum(East China) Qingdao 266580 China College of Chemical and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China

Two Co(II)-MOFs with different structures were successfully synthesized under the premise of designing two ligands containing alkynyl functional groups. Complexes 1 ([Co(TEPA)(TPT)2/3]·2DMF·H2O) and 2 ([Co(EPA)(TPT)]·1.5DMF·1.5H2O) show excellent luminescence properties. Meanwhile, as fluorescent sensors, complexes 1 and 2 exhibit selectivity and sensitivity for Fe3+ with the Ksv of 1.520 ×104 L/mol and 3.543 ×104 L/mol, which can rapidly detect nitroaromatic compounds in methanol and ethanol, especially for 2,4-NPH through fluorescence quenching with high quenching efficiency. In particular, the Ksv value of complexes 1 and 2 towards 2,4-NPH can reach up to 1.627 ×105 L/mol and 9.600 ×104 L/mol, demonstrating that complexes 1 and 2 are good candidates for the identification and detection of Fe3+and nitroaromatic compounds.

关键词： Metal-organic frameworks Alkynyl functionalized Fluorescence sensor Fe3+ ion nitroaromatic compounds

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3-D QSAR study on a set of nitroaromatic compounds

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Chinese Science Bulletin 2002年第3期47卷 189-193页

作者： Xu, M Zhang, AQ Han, SK Wang, LS Nanjing Univ Sch Environm State Key Lab Pollut Control & Resource Reuse Nanjing 210093 Peoples R China

The 3-D relationships between the structures of 25 nitroaromatic compounds and their toxicities have been investigated using the comparative molecular field analysis (CoMFA) method, and a 3-D QSAR model with considerable prediction ability is obtained. In comparison with traditional 2-D techniques, CoMFA helps to give a better interpretation of toxic mechanism of tested compounds.

关键词： nitroaromatic compound 3-D QSAR CoMFA.

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DFT Study on the QSAR of nitroaromatic Compound Toxicity to the Fathead Minnow

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Chinese Journal of Chemistry 2005年第8期23卷 947-952页

作者：闫秀芬肖鹤鸣居学海贡雪东 Department of Chemistry Nanjing University of Science and Technology Nanjing Jiangsu 210094 China

The DFT-B3LYP method, with the basis set 6-311G, was employed to calculate the molecular geometries and electronic structures of 31 nitroaromatics. EHOMO, ELUMO, QC, QN. QNO2 and μ were selected as quantum chemical descriptors. The acute toxicity （-lg LC50） of these compounds to the fathead minnow along with the six descriptors was used to establish the quantitative structure-activity relationships （QSARs）, Through stepwise multiple linear regression analysis, a model was established as follows： -lg LC50=9.524-39.527ELUMO＋16.859EHOMO＋15.130QNO2＋4.166QC （n=28, R=0.912, SE=0.361, F=28.468）. The model was applied to predict and elucidate the toxicity of nitroaromatics successfully. Furthermore, a metabolic route of nitroaromatics in fathead minnow was proposed.

关键词： nitroaromatic toxicity density functional theory quantitative structure-activity relationship

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