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Journal articles on the topic 'Nitroaromatic molecules'

Author: Grafiati

Published: 25 May 2024

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1

Su, Xin Fang. "Density Functional Studies on the Standard Heats of Formation for Nitroaromatic Molecules." Advanced Materials Research 1095 (March 2015): 415–18. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.415.

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The standard heats of formation for 12 nitroaromatic molecules in gas at 298 K were calculated at B3P86/6-311G** levels using different isodesmic reactions. Comparison between the computational results and the experimental values reveals that using methane as reference compound to design isodesmic reaction is able to predict satisfactory results of heats of formation for ortho-substituted nitroaromatic molecules; however, using benzene as reference compound is able to give agreement with experimental data for meta-substituted and para-substituted nitroaromatic molecules.

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2

Su, Xin Fang, Wei Huang, and Hai Ying Wu. "Assessment of PBE0 Calculation of C-NO₂ Bond Dissociation Energies for Nitroaromatic System." Advanced Materials Research 915-916 (April 2014): 675–78. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.675.

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Density functional theory (DFT) is used to calculate the C-NO2bond dissociation energies (BDEs) in nitrobenzene; 3-amino-nitrobenze; 4-amino-nitrobenze; 1,3-dinitrobenzene; 1,4-dinitrobenzene; 2-methyl-nitrobenzene; 4-methyl-nitrobenzene and 1,3,5-trinitrobenzene nitroaromatic molecular system. B3P86 and PBE0 methods in combination with 6-31G** and 6-311G** basis sets are employed. Comparison between the computational results and the experimental values reveals that the calculated C-NO2bond BDEs can be improved from B3P86 to PBE0 functional. Level of theory employing PBE0/6-311G** is found to

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3

Cha, Inhwan, Seohyun Baek, Sun Gu Song, et al. "Inter- and Intra-Hydrogen Bonding Strategy to Control the Fluorescence of Acylhydrazone-Based Conjugated Microporous Polymers and Their Application to Nitroaromatics Detection." Macromol 1, no. 3 (2021): 234–42. http://dx.doi.org/10.3390/macromol1030016.

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Acylhydrazone-based fluorescent conjugated microporous polymers (CMPs) with inter-and intra-hydrogen bonding-controlled emissive properties were prepared. The synthesized CMPs (BH-CMP and ABH-CMP) were characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, solid-state 13C cross polarization/magic angle spinning nuclear magnetic resonance spectroscopy, and photoluminescence spectroscopy. Interestingly, BH-CMP exhibited emission enhancement via adsorption of water molecules, whereas the emission of ABH-CMP, which possesses free amine groups, decreased upon the addition of w

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4

Zhao, Shu-Man, Zhao-Feng Qiu, Zou-Hong Xu, Zi-Qing Huang, Yue Zhao, and Wei-Yin Sun. "Fluorescent Zn(ii) frameworks with multicarboxylate and pyridyl N-donor ligands for sensing specific anions and organic molecules." Dalton Transactions 51, no. 9 (2022): 3572–80. http://dx.doi.org/10.1039/d1dt04052a.

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Three new Zn(ii)-based frameworks were fabricated and their fluorescence and sensing properties for specific anions and organic molecules such as benzaldehyde (BZH) and nitroaromatic compounds (NACs) were examined.

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5

Nakagaki, Ryoichi, Kiyoshi Mutai, Mitsuo Hiramatsu, Hideyuki Tukada, and Saburo Nakakura. "Magnetic field effects upon photochemistry of bichromophoric chain molecules containing nitroaromatic and arylamino moieties: Elucidation of reaction mechanism and control of reaction yields." Canadian Journal of Chemistry 66, no. 8 (1988): 1989–96. http://dx.doi.org/10.1139/v88-321.

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The photochemistry of bichromophoric species containing nitroaromatic and arylamino moieties has been studied in the presence and absence of an external magnetic field. Photolysis products are an unsubstituted arylamine, a nitrosoaromatic species (Product 1), and a nitroaromatic compound (Product 2). On application of the magnetic field, the formation yield for Product 1 decreases and that for Product 2 correspondingly increases, whereas the consumption of the starting material and the release of the unsubstituted arylamine are independent of the magnetic field. Analysis of the magnetic field

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6

Ju, Kou-San, and Rebecca E. Parales. "Nitroaromatic Compounds, from Synthesis to Biodegradation." Microbiology and Molecular Biology Reviews 74, no. 2 (2010): 250–72. http://dx.doi.org/10.1128/mmbr.00006-10.

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SUMMARY Nitroaromatic compounds are relatively rare in nature and have been introduced into the environment mainly by human activities. This important class of industrial chemicals is widely used in the synthesis of many diverse products, including dyes, polymers, pesticides, and explosives. Unfortunately, their extensive use has led to environmental contamination of soil and groundwater. The nitro group, which provides chemical and functional diversity in these molecules, also contributes to the recalcitrance of these compounds to biodegradation. The electron-withdrawing nature of the nitro g

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7

Yan, Jingjing, Alexander D. Carl, Alex R. Maag, et al. "Detection of adsorbates on emissive MOF surfaces with X-ray photoelectron spectroscopy." Dalton Transactions 48, no. 14 (2019): 4520–29. http://dx.doi.org/10.1039/c8dt04404j.

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The luminescence of azobenzene chromophore struts in a metal organic framework is quenched by nitroaromatic guests. X-ray photoelectron spectroscopic methods verify the emission changes are due to the surface adsorption of the guest molecules rather than encapsulation.

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8

Francisco da Silva, Amauri, Antonio João da Silva Filho, Mário Vasconcellos, and Otávio Luís de Santana. "One-Electron Reduction Potentials: Calibration of Theoretical Protocols for Morita–Baylis–Hillman Nitroaromatic Compounds in Aprotic Media." Molecules 23, no. 9 (2018): 2129. http://dx.doi.org/10.3390/molecules23092129.

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Nitroaromatic compounds—adducts of Morita–Baylis–Hillman (MBHA) reaction—have been applied in the treatment of malaria, leishmaniasis, and Chagas disease. The biological activity of these compounds is directly related to chemical reactivity in the environment, chemical structure of the compound, and reduction of the nitro group. Because of the last aspect, electrochemical methods are used to simulate the pharmacological activity of nitroaromatic compounds. In particular, previous studies have shown a correlation between the one-electron reduction potentials in aprotic medium (estimated by cycl

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9

Malval, Jean-Pierre, Marion Cranney, Sylvain Achelle та ін. "Porosity-driven large amplitude dynamics for nitroaromatic sensing with fluorescent films of alternating D–π–A molecules". Chemical Communications 55, № 95 (2019): 14331–34. http://dx.doi.org/10.1039/c9cc07227f.

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Very large amplitude nitroaromatic sensing dynamics are observed upon a structural change within an alternating D–π–A chromophore initially configured to promote densely cofacial self-packing at a macromolecular scale.

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10

Marshall, A., A. Clark, R. Jennings, K. W. D. Ledingham, J. Sander, and R. P. Singhal. "Laser-induced dissociation, ionization and fragmentation processes in nitroaromatic molecules." International Journal of Mass Spectrometry and Ion Processes 116, no. 2 (1992): 143–56. http://dx.doi.org/10.1016/0168-1176(92)80124-j.

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11

Ture, Satish Ashok, Shruthy D. Pattathil, Bertrand Zing Zing, and Venkataraman Abbaraju. "Fluorescence Sensing of Some Important Nitroaromatic Compounds by Using Polyaniline Ag Composite." Micro 3, no. 1 (2023): 224–38. http://dx.doi.org/10.3390/micro3010016.

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Conducting polymers (CPs) have contributed significantly to the field of sensing. The sensing of nitroaromatic compounds by fluorescence has recently gained more attention due to its sensitivity and selectivity. In this study, polyaniline (PANI) was functionalized by forming a polyaniline-Ag (PANI-Ag) composite and used as a fluorophore for sensing. The nitro groups present in nitroaromatic compounds (NACs) such as 2,4,6-trinitrophenol (picric acid-TNP) and Dinitrobenzene (DNB) act as electron-accepting molecules and quench the fluorescence of polymer chains by showing an amplified quenching e

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12

Murray, Jane S., Pat Lane, and Peter Politzer. "Relationships between impact sensitivities and molecular surface electrostatic potentials of nitroaromatic and nitroheterocyclic molecules." Molecular Physics 85, no. 1 (1995): 1–8. http://dx.doi.org/10.1080/00268979500100891.

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13

Jensen, S., K. Tan, W. Lustig, et al. "Quenching of photoluminescence in a Zn-MOF sensor by nitroaromatic molecules." Journal of Materials Chemistry C 7, no. 9 (2019): 2625–32. http://dx.doi.org/10.1039/c8tc06281a.

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14

Park, Miso, Lakshmi N. Cella, Wilfred Chen, Nosang V. Myung, and Ashok Mulchandani. "Carbon nanotubes-based chemiresistive immunosensor for small molecules: Detection of nitroaromatic explosives." Biosensors and Bioelectronics 26, no. 4 (2010): 1297–301. http://dx.doi.org/10.1016/j.bios.2010.07.017.

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15

Kose, Muhammet Erkan, Barbara A. Harruff, Yi Lin, L. Monica Veca, Fushen Lu, and Ya-Ping Sun. "Efficient Quenching of Photoluminescence from Functionalized Single-Walled Carbon Nanotubes by Nitroaromatic Molecules." Journal of Physical Chemistry B 110, no. 29 (2006): 14032–34. http://dx.doi.org/10.1021/jp063251o.

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16

Lu, Wei, Xiao Dong, Lili Qiu, et al. "Colorimetric sensor arrays based on pattern recognition for the detection of nitroaromatic molecules." Journal of Hazardous Materials 326 (March 2017): 130–37. http://dx.doi.org/10.1016/j.jhazmat.2016.12.024.

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17

Politzer, Peter, Jorge M. Seminario, and Paul R. Bolduc. "A proposed interpretation of the destabilizing effect of hydroxyl groups on nitroaromatic molecules." Chemical Physics Letters 158, no. 5 (1989): 463–69. http://dx.doi.org/10.1016/0009-2614(89)87371-3.

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18

FANG, Ming, Ming, Zhe LI, and Yao FU. "Substituent Effect on the C-NO2and N-NO2Bond Dissociation Energies of Nitroaromatic Molecules." Chinese Journal of Chemistry 26, no. 6 (2008): 1122–28. http://dx.doi.org/10.1002/cjoc.200890200.

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19

Nguyen, Thao Phuong Le, Thao Thanh Bui, Bao Kim Doan, et al. "Synthesis of a conjugated molecular triad based on 9,9-dioctyl-9H-fluorene for fluorescence sensing to determine mesotrione." Ministry of Science and Technology, Vietnam 65, no. 1 (2023): 14–18. http://dx.doi.org/10.31276/vjste.65(1).14-18.

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A conjugated molecular triad based on pyrene and 9,9-dioctyl-9H-fluorene has been successfully synthesised via the Suzuki cross-coupling reaction with yield of 48%. In this polymerization, the Pd(PPh3)4 has been used as the catalytic in the presence of K2CO3 as base in a mixture of toluene/ethanol/H2O at 80oC under N2. The chemical structures of the conjugated molecules were determined via Fourier-transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H-NMR) that proved the chemical structure of 1,1’-(9,9-dioctyl-9H-fluorene-2,7-diyl)dipyrene. The optical properties of the mol

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20

Lessner, Daniel J., Rebecca E. Parales, Shakti Narayan, and David T. Gibson. "Expression of the Nitroarene Dioxygenase Genes in Comamonas sp. Strain JS765 and Acidovorax sp. Strain JS42 Is Induced by Multiple Aromatic Compounds." Journal of Bacteriology 185, no. 13 (2003): 3895–904. http://dx.doi.org/10.1128/jb.185.13.3895-3904.2003.

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ABSTRACT This work reports a genetic analysis of the expression of nitrobenzene dioxygenase (NBDO) in Comamonas sp. strain JS765 and 2-nitrotoluene dioxygenase (2NTDO) in Acidovorax sp. strain JS42. Strains JS765 and JS42 possess identical LysR-type regulatory proteins, NbzR and NtdR, respectively. NbzR/NtdR is homologous to NahR, the positive salicylate-responsive transcriptional activator of the naphthalene degradation genes in Pseudomonas putida G7. The genes encoding NBDO and 2NTDO in each strain are cotranscribed, and transcription starts at the same site within identical promoter regions

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21

Dai, Jingjing, Michael Zambrana, and Maria Fidalgo. "Amino-functionalized Fluorescent Carbon Dots for Chemical Sensing." MRS Advances 1, no. 19 (2016): 1365–70. http://dx.doi.org/10.1557/adv.2016.169.

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ABSTRACTQuantum dots have been applied in sensing with success, but their use in environmental applications has been questioned due to their heavy metal content. Carbon dots are fluorescent nanoparticles that offer a promising alternative to quantum dots for sensing, due to their low cost, benign fabrication process and negligible environmental impact. Fluorescence sensors are specially suited for detection of nitroaromatic compounds such as 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT), since they can quench the emission of excited species. When combined to Molecularly Imprinted Po

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22

Rice, Betsy M., Samir Sahu, and Frank J. Owens. "Density functional calculations of bond dissociation energies for NO2 scission in some nitroaromatic molecules." Journal of Molecular Structure: THEOCHEM 583, no. 1-3 (2002): 69–72. http://dx.doi.org/10.1016/s0166-1280(01)00782-5.

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23

Lopatin, B. V. "Interaction of vibrations of atomic groups for the example of molecules of nitroaromatic compounds." Journal of Applied Spectroscopy 43, no. 4 (1985): 1137–39. http://dx.doi.org/10.1007/bf00662331.

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24

Zobel, J. Patrick, and Leticia González. "Nonadiabatic Dynamics Simulation Predict Intersystem Crossing in Nitroaromatic Molecules on a Picosecond Time Scale." ChemPhotoChem 3, no. 9 (2019): 833–45. http://dx.doi.org/10.1002/cptc.201900108.

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25

Xiang, Zhonghua, and Dapeng Cao. "Synthesis of Luminescent Covalent-Organic Polymers for Detecting Nitroaromatic Explosives and Small Organic Molecules." Macromolecular Rapid Communications 33, no. 14 (2012): 1184–90. http://dx.doi.org/10.1002/marc.201100865.

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26

Nainsi, Nainsi, and Nibedita Banik. "Detection of Picric Acid: By Fluorescent Chemosensor (Nitro-Aromatic Compound): A Short Review." Material Science Research India 20, SpecialIssue1 (2023): 40–47. http://dx.doi.org/10.13005/msri.20.special-issue1.05.

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ABSTRACT: The most abundant and valuable class of chemicals currently used in industries are referred to as nitroaromatic compounds. These are compounds that include organic molecules and, more importantly, at least one nitro- group in the ring. As we already know, chemistry is currently known for using a variety of fluorescent techniques. Picric acid (O2N)3C6H2OH) is an organic compound also known as 2, 4, 6-trinitrophenol (TNP), according to the IUPAC. It is extensively used in the industries of dyes, leather, fireworks, and matches. In this review, author tried to explain how to detect picr

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27

Miseviciene, Lina, Zilvinas Anusevicius, Jonas Sarlauskas, and Narimantas Cenas. "Reduction of nitroaromatic compounds by NAD(P)H:quinone oxidoreductase (NQO1): the role of electron-accepting potency and structural parameters in the substrate specificity." Acta Biochimica Polonica 53, no. 3 (2006): 569–76. http://dx.doi.org/10.18388/abp.2006_3329.

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We aimed to elucidate the role of electronic and structural parameters of nitroaromatic compounds in their two-electron reduction by NAD(P)H:quinone oxidoreductase (NQO1, DT-diaphorase, EC 1.6.99.2). The multiparameter regression analysis shows that the reactivity of nitroaromatic compounds (n=38) increases with an increase in their single-electron reduction potential and the torsion angle between nitrogroup(s) and the aromatic ring. The binding efficiency of nitroaromatics in the active center of NQO1 exerted a less evident role in their reactivity. The reduction of nitroaromatics is characte

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28

Miliukiene, Valė, and Narimantas Čėnas. "Cytotoxicity of Nitroaromatic Explosives and their Biodegradation Products in Mice Splenocytes: Implications for their Immunotoxicity." Zeitschrift für Naturforschung C 63, no. 7-8 (2008): 519–25. http://dx.doi.org/10.1515/znc-2008-7-809.

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Nitroaromatic explosives like 2,4,6-trinitrotoluene (TNT) and 2,4,6-trinitrophenyl-Nmethyl- nitramine (tetryl) comprise an important group of toxic environmental pollutants, whose toxicity is mainly attributed to the flavoenzyme electrontransferase-catalyzed redox cycling of their free radicals (oxidative stress) and DT-diaphorase [NAD(P)H:quinone oxidoreductase, NQO1, EC 1. 6.99.2]-catalyzed formation of alkylating nitroso and/or hydroxylamine metabolites. Because of the incomprehensive data on the immunotoxic effects of nitroaromatic explosives, we have studied the structure-cytotoxicity rel

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Hromadová, Magdaléna, Romana Sokolová, Lubomír Pospíšil, Štěpánka Lachmanová, Nicolangelo Fanelli, and Stefania Giannarelli. "Host–Guest interaction of pesticide bifenox with cyclodextrin molecules. An electrochemical study." Collection of Czechoslovak Chemical Communications 74, no. 11-12 (2009): 1647–64. http://dx.doi.org/10.1135/cccc2009509.

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The reduction of nitroaromatic compound bifenox (methyl 5-(2,4-dichlorophenoxy)-2-nitrobenzoate) was studied in aprotic solvents in the absence or presence of cyclodextrin (CD) molecules of different cavity sizes. βCD and γCD form complexes with bifenox in DMSO with the complex formation constants (5 ± 2) × 102 M–1 [βCD–bifenox] and (3 ± 1) × 102 M–1 [γCD–bifenox], respectively. Bifenox yields a relatively stable anion radical in dimethyl sulfoxide, which is further reduced at more negative potentials by an overall addition of three electrons and four protons to the corresponding phenylhydroxy

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30

Lauzier, Annie, Claudia Goyer, Luc Ruest, Ryszard Brzezinski, Don L. Crawford, and Carole Beaulieu. "Effect of amino acids on thaxtomin A biosynthesis by Streptomyces scabies." Canadian Journal of Microbiology 48, no. 4 (2002): 359–64. http://dx.doi.org/10.1139/w02-031.

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The regulatory effect of amino acids on the production of thaxtomin A, a phytotoxin produced by Streptomyces scabies, was investigated. Tryptophan had an important inhibitory effect on the toxin biosynthesis in all five strains of S. scabies tested. Two other aromatic amino acids (tyrosine and phenylalanine) also inhibited thaxtomin A biosynthesis, while aliphatic amino acids did not cause an important decline in thaxtomin A production. Methylation of tryptophan prevented or reduced the inhibitory effect on thaxtomin A biosynthesis. In spite of the inhibitory action of tryptophan and phenylala

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31

Liu, Weitao, Wajid Ali, Ye Liu, Mingliang Li, and Ziwei Li. "Sensitive Detection of Trace Explosives by a Self-Assembled Monolayer Sensor." Micromachines 14, no. 12 (2023): 2179. http://dx.doi.org/10.3390/mi14122179.

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Fluorescence probe technology holds great promise in the application of trace explosive detection due to its high sensitivity, fast response speed, good selectivity, and low cost. In this work, a designed approach has been employed to prepare the TPE-PA-8 molecule, utilizing the classic aggregation-induced emission (AIE) property of 1,1,2,2-tetraphenylethene (TPE), for the development of self-assembled monolayers (SAMs) targeting the detection of trace nitroaromatic compound (NAC) explosives. The phosphoric acid acts as an anchoring unit, connecting to TPE through an alkyl chain of eight molec

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32

Xu, Liming, Jing Wu, Weiqiang Zhou, et al. "Using nitroaromatic fused-heterocycle molecules as nitrogen source to hugely boost the capacitance performance of graphene." Electrochimica Acta 354 (September 2020): 136703. http://dx.doi.org/10.1016/j.electacta.2020.136703.

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33

Karikalan, Natarajan, Subbiramaniyan Kubendhiran, Shen-Ming Chen, Periyasamy Sundaresan, and Raj Karthik. "Electrocatalytic reduction of nitroaromatic compounds by activated graphite sheets in the presence of atmospheric oxygen molecules." Journal of Catalysis 356 (December 2017): 43–52. http://dx.doi.org/10.1016/j.jcat.2017.09.012.

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34

Osorio, Manuel I., Nicolás Bruna, Víctor García, et al. "Structural Factors That Determine the Activity of the Xenobiotic Reductase B Enzyme from Pseudomonas putida on Nitroaromatic Compounds." International Journal of Molecular Sciences 24, no. 1 (2022): 400. http://dx.doi.org/10.3390/ijms24010400.

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Xenobiotic reductase B (XenB) catalyzes the reduction of the aromatic ring or nitro groups of nitroaromatic compounds with methyl, amino or hydroxyl radicals. This reaction is of biotechnological interest for bioremediation, the reuse of industrial waste or the activation of prodrugs. However, the structural factors that explain the binding of XenB to different substrates are unknown. Molecular dynamics simulations and quantum mechanical calculations were performed to identify the residues involved in the formation and stabilization of the enzyme/substrate complex and to explain the use of dif

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35

Bailey-Darland, Sullivan, Taylor D. Krueger, and Chong Fang. "Ultrafast Spectroscopies of Nitrophenols and Nitrophenolates in Solution: From Electronic Dynamics and Vibrational Structures to Photochemical and Environmental Implications." Molecules 28, no. 2 (2023): 601. http://dx.doi.org/10.3390/molecules28020601.

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Nitrophenols are a group of small organic molecules with significant environmental implications from the atmosphere to waterways. In this work, we investigate a series of nitrophenols and nitrophenolates, with the contrasting ortho-, meta-, and para-substituted nitro group to the phenolic hydroxy or phenolate oxygen site (2/3/4NP or NP−), implementing a suite of steady-state and time-resolved spectroscopic techniques that include UV/Visible spectroscopy, femtosecond transient absorption (fs-TA) spectroscopy with probe-dependent and global analysis, and femtosecond stimulated Raman spectroscopy

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Dong, Bao-Xia, Yong-Mei Pan, Wen-Long Liu, and Yun-Lei Teng. "An Ultrastable Luminescent Metal–Organic Framework for Selective Sensing of Nitroaromatic Compounds and Nitroimidazole-Based Drug Molecules." Crystal Growth & Design 18, no. 1 (2017): 431–40. http://dx.doi.org/10.1021/acs.cgd.7b01430.

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37

Boopathy, R., and C. F. Kulpa. "Nitroaromatic compounds serve as nitrogen source for Desulfovibrio sp. (B strain)." Canadian Journal of Microbiology 39, no. 4 (1993): 430–33. http://dx.doi.org/10.1139/m93-062.

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A sulfate-reducing bacterium, Desulfovibrio sp. (B strain), isolated from a continuous anaerobic digester, used various nitroaromatic compounds such as 2,4-dinitrophenol, 2,4-dinitrotoluene, and 2,6-dinitrotoluene as sole nitrogen sources for growth and also used these compounds as electron acceptors in the absence of sulfate in the culture medium. More than 60% of the nitroaromatics were transformed within 6 days of incubation. The organism also used aniline as sole nitrogen source, but not as an electron acceptor. Desulfovibrio sp. (B strain) did not use nitroaromatics as sole source of carb

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38

Shao, Juxiang, Xinlu Cheng, and Xiangdong Yang. "Density functional calculations of bond dissociation energies for removal of the nitrogen dioxide moiety in some nitroaromatic molecules." Journal of Molecular Structure: THEOCHEM 755, no. 1-3 (2005): 127–30. http://dx.doi.org/10.1016/j.theochem.2005.08.008.

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39

Yang, Hong, Mi Zhou, Huarong Li, et al. "Effects of Low-level Lipid Peroxidation on the Permeability of Nitroaromatic Molecules across a Membrane: A Computational Study." ACS Omega 5, no. 10 (2020): 4798–806. http://dx.doi.org/10.1021/acsomega.9b03462.

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40

Marshall, A., A. Clark, K. W. D. Ledingham, J. Sander, and R. P. Singhal. "Laser ionisation studies of nitroaromatic and NOx(x = 1 or 2) molecules in the region 224–238 nm." International Journal of Mass Spectrometry and Ion Processes 125, no. 2-3 (1993): R21—R26. http://dx.doi.org/10.1016/0168-1176(93)80052-g.

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41

Marchisio, Andrea, and Jean-Marc Tulliani. "Semiconducting Metal Oxides Nanocomposites for Enhanced Detection of Explosive Vapors." Ceramics 1, no. 1 (2018): 98–119. http://dx.doi.org/10.3390/ceramics1010009.

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In recent years, the detection of ultratraces of nitroaromatic compounds (NACs), such as 2,4,6-trinitrotoluene (TNT), has gained considerable attention due to associated problems related to environment, security against terrorists and health. The principle of NACs detection is simple since any explosive emits a rather small, but detectable number of molecules. Thus, numerous detection techniques have been developed throughout the years, but their common limitations are rather large sizes and weights, high power consumption, unreliable detection with false alarms, insufficient sensitivity and/o

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42

Zhang, Linyuan, Jung Hyun Son, Zhe Bai, et al. "Characterizing Atmospheric Brown Carbon and Its Emission Sources during Wintertime in Shanghai, China." Atmosphere 13, no. 6 (2022): 991. http://dx.doi.org/10.3390/atmos13060991.

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Atmospheric brown carbon (BrC) is a kind of organic aerosol that efficiently absorbs ultraviolet-visible light and has an impact on climate forcing. We conducted an in-depth field study on ambient aerosols at a monitoring point in Shanghai, China, aiming to investigate the potential emission sources, molecular structures, and the contributions to light absorptions of ambient BrC chromophores. The results indicated that nine molecules were identified as nitroaromatic compounds, five of which (4-nitrophenol, 4-nitrocatechol, 2-nitro-1-naphthol, 3-methyl-4-nitrocatechol, and 2-methyl-4-nitropheno

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43

Pajuelo-Corral, Oier, Laura Razquin-Bobillo, Sara Rojas, et al. "Lanthanide(III) Ions and 5-Methylisophthalate Ligand Based Coordination Polymers: An Insight into Their Photoluminescence Emission and Chemosensing for Nitroaromatic Molecules." Nanomaterials 12, no. 22 (2022): 3977. http://dx.doi.org/10.3390/nano12223977.

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The work presented herein reports on the synthesis, structural and physico-chemical characterization, luminescence properties and luminescent sensing activity of a family of isostructural coordination polymers (CPs) with the general formula [Ln2(μ4-5Meip)3(DMF)]n (where Ln(III) = Sm (1Sm), Eu (2Eu), Gd (3Gd), Tb (4Tb) and Yb (5Yb) and 5Meip = 5-methylisophthalate, DMF = N,N-dimethylmethanamide). Crystal structures consist of 3D frameworks tailored by the linkage between infinite lanthanide(III)-carboxylate rods by means of the tetradentate 5Meip ligands. Photoluminescence measurements in solid

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Ahn, Hyun, and Suhyuk Choi. "Membraneless Ionic Liquid Droplet Nanoprobe for Vapor Sensing and Gas Phase Scanning Electrochemical Microscopy." ECS Meeting Abstracts MA2023-02, no. 62 (2023): 2945. http://dx.doi.org/10.1149/ma2023-02622945mtgabs.

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Gas phase sensing of volatile chemicals is a critical area of research relevant to biomedical diagnosis and environmental hazard assessment. Among various types of sensors, electrochemical sensors garnered attention as cost-effective and portable methods. Most electrochemical sensors needed the membrane to prevent solvent evaporation for detecting the gaseous species. However, the presence of the membrane induced slow response time due to the penetration of gas molecules through the membrane. To improve the systems, a membraneless ionic liquid droplet nanoprobe was developed. Gaseous species c

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Nivinskas, H., R. L. Koder, Z. Anusevicius, J. Sarlauskas, A. F. Miller, and N. Cenas. "Two-electron reduction of nitroaromatic compounds by Enterobacter cloacae NAD(P)H nitroreductase: description of quantitative structure-activity relationships." Acta Biochimica Polonica 47, no. 4 (2000): 941–49. http://dx.doi.org/10.18388/abp.2000_3949.

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Enterobacter cloacae NAD(P)H:nitroreductase catalyzes the reduction of a series of nitroaromatic compounds with steady-state bimolecular rate constants (kcat/Km) ranging from 10(4) M(-1) s(-1) to 10(7) M(-1) s(-1), and oxidizing 2 moles NADH per mole mononitrocompound. Oxidation of excess NADH by polynitrobenzenes including explosives 2,4,6-trinitrotoluene (TNT) and 2,4,6-trinitrophenyl-N-methylnitramine (tetryl), has been observed as a slower secondary process, accompanied by O2 consumption. This type of 'redox cycling' was not related to reactions of nitroaromatic anion-radicals, but was cau

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Marshall, A., A. Clark, R. M. Deas, et al. "Sensitive atmospheric pressure detection of nitroaromatic compounds and NO x (x= 1,2) molecules in an ionization chamber using resonance-enhanced multi-photon ionization." Analyst 119, no. 8 (1994): 1719. http://dx.doi.org/10.1039/an9941901719.

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Čėnas, Narimantas, Aušra Nemeikaitė-Čėnienė, and Lidija Kosychova. "Single- and Two-Electron Reduction of Nitroaromatic Compounds by Flavoenzymes: Mechanisms and Implications for Cytotoxicity." International Journal of Molecular Sciences 22, no. 16 (2021): 8534. http://dx.doi.org/10.3390/ijms22168534.

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Nitroaromatic compounds (ArNO2) maintain their importance in relation to industrial processes, environmental pollution, and pharmaceutical application. The manifestation of toxicity/therapeutic action of nitroaromatics may involve their single- or two-electron reduction performed by various flavoenzymes and/or their physiological redox partners, metalloproteins. The pivotal and still incompletely resolved questions in this area are the identification and characterization of the specific enzymes that are involved in the bioreduction of ArNO2 and the establishment of their contribution to cytoto

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Wen, Hai-Ying, Li-Bin Pan, Shu-Rong Ma, et al. "Structural basis for the transformation of the traditional medicine berberine by bacterial nitroreductase." Acta Crystallographica Section D Structural Biology 78, no. 10 (2022): 1273–82. http://dx.doi.org/10.1107/s2059798322008373.

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The bacterial nitroreductases (NRs) NfsB and NfsA are conserved homodimeric FMN-dependent flavoproteins that are responsible for the reduction of nitroaromatic substrates. Berberine (BBR) is a plant-derived isoquinoline alkaloid with a large conjugated ring system that is widely used in the treatment of various diseases. It was recently found that the gut microbiota convert BBR into dihydroberberine (dhBBR, the absorbable form) mediated by bacterial NRs. The molecular basis for the transformation of BBR by the gut microbiota remains unclear. Here, kinetic studies showed that NfsB from Escheric

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Lesanavičius, Mindaugas, Daisuke Seo, Gintarė Maurutytė, and Narimantas Čėnas. "Redox Properties of Bacillus subtilis Ferredoxin:NADP+ Oxidoreductase: Potentiometric Characteristics and Reactions with Pro-Oxidant Xenobiotics." International Journal of Molecular Sciences 25, no. 10 (2024): 5373. http://dx.doi.org/10.3390/ijms25105373.

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Bacillus subtilis ferredoxin:NADP+ oxidoreductase (BsFNR) is a thioredoxin reductase-type FNR whose redox properties and reactivity with nonphysiological electron acceptors have been scarcely characterized. On the basis of redox reactions with 3-acetylpyridine adenine dinucleotide phosphate, the two-electron reduction midpoint potential of the flavin adenine dinucleotide (FAD) cofactor was estimated to be −0.240 V. Photoreduction using 5-deazaflavin mononucleotide (5-deazaFMN) as a photosensitizer revealed that the difference in the redox potentials between the first and second single-electron

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Lesanavičius, Mindaugas, Daisuke Seo, and Narimantas Čėnas. "Thioredoxin Reductase-Type Ferredoxin: NADP+ Oxidoreductase of Rhodopseudomonas palustris: Potentiometric Characteristics and Reactions with Nonphysiological Oxidants." Antioxidants 11, no. 5 (2022): 1000. http://dx.doi.org/10.3390/antiox11051000.

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Rhodopseudomonas palustris ferredoxin:NADP+ oxidoreductase (RpFNR) belongs to a novel group of thioredoxin reductase-type FNRs with partly characterized redox properties. Based on the reactions of RpFNR with the 3-acetylpyridine adenine dinucleotide phosphate redox couple, we estimated the two-electron reduction midpoint potential of the FAD cofactor to be −0.285 V. 5-Deaza-FMN-sensitized photoreduction revealed −0.017 V separation of the redox potentials between the first and second electron transfer events. We examined the mechanism of oxidation of RpFNR by several different groups of nonphy

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