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1. Self-assembly of curved aromatic molecules in nanoparticles

Author:
Bowal, Kimberly; Martin, Jacob W.; Kraft, Markus
Source:
Carbon 2021 v.182 pp. 70-88
ISSN:
0008-6223
Subject:
polycyclic aromatic hydrocarbons,   etc   ; carbon; energy; molecular dynamics;     Show all 4 Subjects
Abstract:
... The self-assembly and structure of nanoparticles containing curved polycyclic aromatic hydrocarbon molecules (cPAHs) are investigated using molecular modelling. These polar fullerene-like molecules are receiving increased attention recently due to the steric and electronic properties caused by the inclusion of five-membered ring(s) within their hexagonal lattice. In this work, the curPAHIP potenti ...
DOI:
10.1016/j.carbon.2021.05.013

2. Effect of ozone aging on light absorption and fluorescence of brown carbon in soot particles: The important role of polycyclic aromatic hydrocarbons

Author:
Kuang, Yu; Shang, Jing; Chen, Qingcai
Source:
Journal of hazardous materials 2021 v.413 pp. 125406
ISSN:
0304-3894
Subject:
polycyclic aromatic hydrocarbons,   etc   ; absorption; carbon; fluorescence; methanol; ozone; propane; soot;     Show all 8 Subjects
Abstract:
... The evolution of brown carbon (BrC) during atmospheric aging, including the changes in optical properties and chemical compositions, is still unclear. Light absorption and fluorescence of BrC fraction extracted from fresh and ozonized propane soot particles by methanol were systematically measured, which showed that (1) the mass absorption efficiencies (MAE) sharply decreased by ozone (O₃) aging ( ...
DOI:
10.1016/j.jhazmat.2021.125406

3. Perylene diimide based non-fullerene acceptors: top performers and an emerging class featuring N-annulation

Author:
Sharma, Vikas; Koenig, Josh D. B.; Welch, Gregory C.
Source:
Journal of materials chemistry A 2021 v.9 no.11 pp. 6775-6789
ISSN:
2050-7496
Subject:
polycyclic aromatic hydrocarbons,   etc   ; absorption; electronics; light; solar cells;     Show all 5 Subjects
Abstract:
... The perylene diimide (PDI) chromophore is a classic polycyclic aromatic hydrocarbon that has been widely used in the field of organic electronics. A combination of strong visible light absorption and low-lying frontier molecular orbital (FMO) energy levels make PDI useful as a photoactive electron transporting material in organic solar cells. Indeed, PDI based molecules and polymers have been stud ...
DOI:
10.1039/d0ta11197j

4. Palladium-Catalyzed [4 + 3] or [2 + 2 + 3] Annulation via C–H Activation and Subsequent Decarboxylation: Access to Heptagon-Embedded Polycyclic Aromatic Hydrocarbons

Author:
Yang, Xiumei; Chen, Xiahong; Xu, Yankun; Zhang, Minghao; Deng, Guobo; Yang, Yuan; Liang, Yun
Source:
Organic letters 2021 v.23 no.7 pp. 2610-2615
ISSN:
1523-7052
Subject:
polycyclic aromatic hydrocarbons,   etc   ; carbon-hydrogen bond activation; decarboxylation;     Show all 3 Subjects
Abstract:
... The construction of a seven-membered ring in the polycyclic aromatic hydrocarbon skeleton remains a notoriously difficult but attractive challenge. Herein a novel palladium-catalyzed [4 + 3] decarboxylative annulation of 2-iodobiphenyls with 2-(2-halophenyl)acrylic acids is reported, which provides an efficient approach for assembling various tribenzo[7]annulenes via a C–H activation and decarboxy ...
DOI:
10.1021/acs.orglett.1c00520

5. Probing the ‘elephant’: On the essential difference between graphenes and polycyclic aromatic hydrocarbons

Author:
Radovic, Ljubisa R.
Source:
Carbon 2021 v.171 pp. 798-805
ISSN:
0008-6223
Subject:
polycyclic aromatic hydrocarbons,   etc   ; adsorption; graphene; luminescence; magnetism; oxygen;     Show all 6 Subjects
Abstract:
... There is a crucial difference between the structure of a polycyclic aromatic hydrocarbon (PAH) molecule and that of a single-layer sp²-hybridized carbon cluster; its misunderstanding leads to unresolvable inconsistencies when attempting to rationalize the behavior of graphenes across their impressively wide spectrum of existing or potential applications. The PAHs are not ‘nanographenes’, as is too ...
DOI:
10.1016/j.carbon.2020.09.054

6. Hydrodynamic cavitation activation of persulfate for the degradation of polycyclic aromatic hydrocarbons in marine sediments

Author:
Hung, Chang-Mao; Huang, Chin-Pao; Chen, Chiu-Wen; Dong, Cheng-Di
Source:
Environmental pollution 2021 v.286 pp. 117245
ISSN:
0269-7491
Subject:
polycyclic aromatic hydrocarbons,   etc   ; hydrodynamics; marine sediments; reactive oxygen species; sediment contamination;     Show all 5 Subjects
Abstract:
... Hydrodynamic cavitation (HC) coupled with persulfate (PS)-based that resulted in the synergistic degradation of polycyclic aromatic hydrocarbons (PAHs) in contaminated marine sediments. The effects of HC injection pressure and Σ[PAH]: [PS] on the rate and extent of PAH degradation were studied in the pressure range of 0.5–2.0 bar, PS concentration rage of 2 × 10⁻⁴ to 2 × 10⁻² M or Σ[PAH]: [PS] of ...
DOI:
10.1016/j.envpol.2021.117245

7. Octadecylimidazolium ionic liquids-functionalized carbon dots and their precursor co-immobilized silica as hydrophobic chromatographic stationary phase with enhanced shape selectivity

Author:
Jiang, Danni; Chen, Jia; Guan, Ming; Qiu, Hongdeng
Source:
Talanta 2021 v.233 pp. 122513
ISSN:
0039-9140
Subject:
polycyclic aromatic hydrocarbons,   etc   ; chemical species; formononetin; hydrophobicity; imidazoles; reversed-phase liquid chromatography; silica; synergism;     Show all 8 Subjects
Abstract:
... In this work, 1-vinyl-3-octadecylimidazolium bromide ionic liquids ([C₁₈VIm]Br) and their derived carbon dots (ImC₁₈CDs) were prepared, [C₁₈VIm]Br and ImC₁₈CDs were grafted on the silica to obtain Sil-ImC₁₈ and Sil-ImC₁₈CDs, respectively, and they were also co-grafted on silica which named Sil-ImC₁₈/CDs. Compared with Sil-ImC₁₈ and Sil-ImC₁₈CDs columns, Sil-ImC₁₈/CDs column exhibited enhanced sele ...
DOI:
10.1016/j.talanta.2021.122513

8. Effect of biochar-immobilized Sphingomonas sp. PJ2 on bioremediation of PAHs and bacterial community composition in saline soil

Author:
Song, Lichao; Niu, Xuguang; Zhang, Naiwen; Li, Tianjiao
Source:
Chemosphere 2021 v.279 pp. 130427
ISSN:
0045-6535
Subject:
polycyclic aromatic hydrocarbons,   etc   ; Sphingomonas; bacteria; bacterial communities; biochar; bioremediation; community structure; genes; saline soils;     Show all 9 Subjects
Abstract:
... This study aimed to investigate the bioremediation efficiency and bacterial regulation mechanism of biochar-immobilized bacterium (BM) in polycyclic aromatic hydrocarbon (PAH)-contaminated saline soil by conducting pot experiments. In BM treatment, PAH-degrading strain Sphingomonas sp. PJ2 was inoculated into biochar produced at 400 °C and 600 °C using the pine needles (BM400 and BM600). The remov ...
DOI:
10.1016/j.chemosphere.2021.130427

9. Bacterial degradation of pyrene: Biochemical reactions and mechanisms

Author:
Zada, Sahib; Zhou, Haixin; Xie, Jianmin; Hu, Zhong; Ali, Sardar; Sajjad, Wasim; Wang, Hui
Source:
International biodeterioration & biodegradation 2021 v.162 pp. 105233
ISSN:
0964-8305
Subject:
polycyclic aromatic hydrocarbons,   etc   ; Roseobacter; bacterial communities; biodegradation; biomarkers; carbon; catabolism; energy; molecular weight; multiomics; phylotype;     Show all 11 Subjects
Abstract:
... Pyrene is a typical high molecular weight polycyclic aromatic hydrocarbon (HMW-PAH), and its biodegradation has been widely studied. Different microorganisms, including fungi, bacteria and cyanobacteria, have been shown to degrade pyrene as a source of carbon and energy. Bacteria are important pyrene degraders in different environments. To date, different bacterial phylotypes and their pyrene degr ...
DOI:
10.1016/j.ibiod.2021.105233

10. Bioaugmentation strategy to enhance polycyclic aromatic hydrocarbons anaerobic biodegradation in contaminated soils

Author:
Ferraro, Alberto; Massini, Giulia; Miritana, Valentina Mazzurco; Panico, Antonio; Pontoni, Ludovico; Race, Marco; Rosa, Silvia; Signorini, Antonella; Fabbricino, Massimiliano; Pirozzi, Francesco
Source:
Chemosphere 2021 v.275 pp. 130091
ISSN:
0045-6535
Subject:
polycyclic aromatic hydrocarbons,   etc   ; anaerobic digestion; bioaugmentation; biodegradation; biomass; community structure; inoculum; microbial communities; naphthalene; wheat straw;     Show all 10 Subjects
Abstract:
... This paper proposes an innovative bioaugmentation approach for the remediation of polycyclic aromatic hydrocarbon (PAH) contaminated soils, based on a novel habitat-based strategy. This approach was tested using two inocula (i-24 and i-96) previously enriched through an anaerobic digestion process on wheat straw. It relies on the application of allochthonous microorganisms characterized by specifi ...
DOI:
10.1016/j.chemosphere.2021.130091

11. Polycyclic aromatic hydrocarbon contamination along roads based on levels on vehicle window films

Author:
Zhang, Weiwei; Su, Penghao; Tomy, Gregg T.; Sun, Dan; Yin, Fang; Chen, Lisu; Ding, Yongsheng; Li, Yifan; Feng, Daolun
Source:
Environmental pollution 2021 v.279 pp. 116921
ISSN:
0269-7491
Subject:
polycyclic aromatic hydrocarbons,   etc   ; ; United States Environmental Protection Agency; air pollution; carcinogenicity; guidelines; naphthalene; risk; traffic; China;     Show all 10 Subjects
Abstract:
... Vehicular emissions are known to be major contributors of airborne polycyclic aromatic hydrocarbons (PAHs) in cities. In order to assess the long-term contamination of PAHs along roads, we collected organic films from vehicle windows (26 private cars and 4 buses, in Shanghai, China) and used mathematical models to convert the film-bound PAH concentrations to the airborne PAH concentrations. The fi ...
DOI:
10.1016/j.envpol.2021.116921

12. Cascade annulative π-extension for the rapid construction of carbazole based polyaromatic hydrocarbons

Author:
Kundu, Samrat; Banerjee, Ankush; Pal, Shyam Chand; Ghosh, Meghna; Maji, Modhu Sudan
Source:
Chemical communications 2021 v.57 no.47 pp. 5762-5765
ISSN:
1364-548X
Subject:
polycyclic aromatic hydrocarbons,   etc   ; acids; architecture; catalytic activity; chemical communication; methodology; products and commodities; synthesis;     Show all 8 Subjects
Abstract:
... A Brønsted acid catalyzed cascade benzannulation strategy for the one-pot synthesis of densely populated poly-aryl benzo[a]carbazole architectures is disclosed from easily affordable fundamental commodities. The efficacy of this technique was further validated via the concise synthesis of structurally unique carbazole based poly-aromatic hydrocarbons. Furthermore, the photo-physical properties of ...
DOI:
10.1039/d1cc00668a

13. Polycyclic aromatic hydrocarbon accumulation in aged and unaged polyurethane microplastics in contaminated soil

Author:
Černá, Tereza; Pražanová, Kateřina; Beneš, Hynek; Titov, Ivan; Klubalová, Kateřina; Filipová, Alena; Klusoň, Petr; Cajthaml, Tomáš
Source:
The Science of the total environment 2021 v.770 pp. 145254
ISSN:
0048-9697
Subject:
polycyclic aromatic hydrocarbons,   etc   ; biodegradability; environment; foams; microplastics; odors; polluted soils; polyurethanes; sorption;     Show all 9 Subjects
Abstract:
... The interaction of microplastics (MPs) and common environmental organic pollutants has been a frequently discussed topic in recent years. Although the estimated contamination caused by MPs in terrestrial ecosystems is one order of magnitude higher than that in the oceans, experiments have been conducted solely in an aqueous matrix. Therefore, an experiment was carried out with two soils differing ...
DOI:
10.1016/j.scitotenv.2021.145254

14. Distribution Characteristics and Risk Assessment of Polycyclic Aromatic Hydrocarbons in Soils of a Steel Enterprise in East China

Author:
Xie, Meng; Zhang, Shouwen; Cui, Zhaojie; Cao, Xiufeng
Source:
Bulletin of environmental contamination and toxicology 2021 v.106 no.5 pp. 873-877
ISSN:
0007-4861
Subject:
polycyclic aromatic hydrocarbons,   etc   ; business enterprises; carcinogenicity; pollution; risk; risk assessment; steel; sustainable development; toxicology; China;     Show all 10 Subjects
Abstract:
... To meet the goal of sustainable development, many large steel enterprises in China have been relocated, leaving serious polycyclic aromatic hydrocarbon (PAH) pollution problems at the abandoned sites. In this study, the spatial distribution and potential health risks of PAHs in soils of a large steel enterprise in East China were studied. The total concentrations of 16 PAHs ranged from 93.96 to2.6 ...
DOI:
10.1007/s00128-021-03193-9

15. Levels, distributions, and seasonal variations of polycyclic aromatic hydrocarbons (PAHs) in ambient air and pine components

Author:
Çalişkan Eleren, Sevil; Tasdemir, Yücel
Source:
Environmental monitoring and assessment 2021 v.193 no.5 pp. 253
ISSN:
0167-6369
Subject:
polycyclic aromatic hydrocarbons,   etc   ; Pinus pinea; air; air temperature; surface area; trees; winter;     Show all 7 Subjects
Abstract:
... Pine tree (Pinus pinea) components have been used as passive air samples for determining atmospheric polycyclic aromatic hydrocarbon (PAH) concentrations. Our results indicated that pine needles and branches were found to be statistically successful in describing the ambient air. Monthly pine needles, branches (1- and 2-year-old) and ambient air samples were collected for 1 year to identify molecu ...
DOI:
10.1007/s10661-021-09028-8

16. Swing Arm Location-Controllable DNA Walker for Electrochemiluminescence Biosensing

Author:
Liao, Ni; Pan, Mei-Chen; Wang, Li; Yang, Fan; Yuan, Ruo; Zhuo, Ying
Source:
Analytical chemistry 2021 v.93 no.8 pp. 4051-4058
ISSN:
1520-6882
Subject:
polycyclic aromatic hydrocarbons,   etc   ; DNA; analytical chemistry; biosensors; detection limit; electrochemiluminescence; microRNA;     Show all 7 Subjects
Abstract:
... Here, we described a novel swing arm location-controllable DNA walker based on the DNA tetrahedral nanostructures (DTNs) for nucleic acid detection using the polycyclic aromatic hydrocarbon (PAH) microcrystals (TAPE-Pe MCs) consisting of the nonplanar molecular tetrakis(4-aminophenyl)ethene (TAPE) and planar molecular perylene (Pe) as electrochemiluminescence (ECL) luminophores. Specifically, the ...
DOI:
10.1021/acs.analchem.0c05051

17. Electrochemical Synthesis, Deposition, and Doping of Polycyclic Aromatic Hydrocarbon Films

Author:
Zeng, Cheng; Wang, Bohan; Zhang, Huanhuan; Sun, Mingxiao; Huang, Liangbin; Gu, Yanwei; Qiu, Zijie; Müllen, Klaus; Gu, Cheng; Ma, Yuguang
Source:
Journal of the American Chemical Society 2021 v.143 no.7 pp. 2682-2687
ISSN:
1520-5126
Subject:
polycyclic aromatic hydrocarbons,   etc   ; Fourier transform infrared spectroscopy; Raman spectroscopy; electrochemistry; electrosynthesis; mass spectrometry;     Show all 6 Subjects
Abstract:
... Polycyclic aromatic hydrocarbons (PAHs) are employed as organic semiconductors because their delocalized π-electron systems and strong intermolecular interactions endow them with an exceptional charge-transport ability. However, the deposition of PAHs from solution onto high-quality thin films is often difficult. Here, we report a one-step electrochemical method to synthesize and deposit unsubstit ...
DOI:
10.1021/jacs.0c13298

18. Fuel Aromaticity Promotes Low-Temperature Nucleation Processes of Elemental Carbon from Biomass and Coal Combustion

Author:
Han, Yong; Chen, Yingjun; Feng, Yanli; Shang, Yu; Li, Jun; Li, Qing; Chen, Jianmin
Source:
Environmental science & technology 2021 v.55 no.4 pp. 2532-2540
ISSN:
1520-5851
Subject:
polycyclic aromatic hydrocarbons,   etc   ; biomass; carbon; coal; environmental science; fuel combustion; straw; technology; temperature; wood;     Show all 10 Subjects
Abstract:
... Significant elemental carbon (EC) emissions from low-temperature solid fuel combustion cannot be explained by classical mechanisms ascribing EC to higher-temperature condensation (> 850 °C). The importance of fuel composition in promoting EC nucleation was investigated by studying EC and polycyclic aromatic hydrocarbon (PAH) formation at multiple-ignition temperatures (300–900 °C) using fuels with ...
DOI:
10.1021/acs.est.0c06694

19. Functional potential and assembly of microbes from sediments in a lake bay and adjoining river ecosystem for polycyclic aromatic hydrocarbon biodegradation

Author:
Yan, Zaisheng; Song, Na; Wang, Changhui; Jiang, Helong
Source:
Environmental microbiology 2021 v.23 no.2 pp. 628-640
ISSN:
1462-2912
Subject:
polycyclic aromatic hydrocarbons,   etc   ; biodegradation; bioremediation; community structure; ecosystems; lakes; microbial communities; quinoline; rivers; sediments; toxicity;     Show all 11 Subjects
Abstract:
... Lake and adjoining river ecosystems are ecologically and economically valuable and are heavily threatened by anthropogenic activities. Determining the inherent capacity of ecosystems for polycyclic aromatic hydrocarbon (PAH) biodegradation can help quantify environmental impacts on the functioning of ecosystems, especially on that of the microbial community. Here, PAH biodegradation potential was ...
DOI:
10.1111/1462-2920.15104

20. The Role of Methyl Groups in the Early Stage of Thermal Polymerization of Polycyclic Aromatic Hydrocarbons Revealed by Molecular Imaging

Author:
Chen, Pengcheng; Fatayer, Shadi; Schuler, Bruno; Metz, Jordan N.; Gross, Leo; Yao, Nan; Zhang, Yunlong
Source:
Energy & fuels 2021 v.35 no.3 pp. 2224-2233
ISSN:
1520-5029
Subject:
polycyclic aromatic hydrocarbons,   etc   ; atomic force microscopy; energy; heat treatment; mass spectrometry; polymerization;     Show all 6 Subjects
Abstract:
... The initial thermal reactions of aromatic hydrocarbons are relevant to many industrial applications. However, tracking the growing number of heavy polycyclic aromatic hydrocarbon (PAH) products is extremely challenging because many reactions are unfolding in parallel from a mixture of molecules. Herein, we studied the reactions of 2,7-dimethylpyrene (DMPY) to decipher the roles of methyl substitue ...
DOI:
10.1021/acs.energyfuels.0c04016