Category: 191-07-1

Feng, Zhen published the artcileTwo-dimensional metal-organic framework Mo₃(C₂O)₁₂ as a promising single-atom catalyst for selective nitrogen-to-ammonia conversion, Recommanded Product: Coronene, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2022), 10(9), 4731-4738, database is CAplus.

The development of single-atom catalysts (SACs) for the electrocatalytic nitrogen reduction reaction (NRR) remains a great challenge. Using d. functional theory calculations, we design a new family of two-dimensional metal-organic frameworks [TM₃(C₂O)₁₂, TM = Sc-Au] and explore their feasibility as SACs for the NRR. The calculated adsorption Gibbs free energies of N₂ and NNH species demonstrate that only the Mo₃(C₂O)₁₂ monolayer could both activate the NN bond and stabilize the adsorbed NNH intermediate. The Mo₃(C₂O)₁₂ metal-organic framework not only possesses sufficient stability, but also exhibits high nitrogen fixation activity and substantial selectivity. The NRR distal pathway could achieve this sufficient goal with a low limiting potential of -0.36 V and a promising theor. faradaic efficiency value of 100%. This work could give guidance to develop more effective NRR SACs using 2D metal-organic frameworks under ambient conditions.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Recommanded Product: Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Gul, Iram published the artcilePermeability of boron- and nitrogen-doped graphene nanoflakes for protium/deuterium ions, Safety of Coronene, the publication is RSC Advances (2022), 12(7), 3883-3891, database is CAplus and MEDLINE.

Two-dimensional (2D) monolayer nanomaterials are the thinnest possible membranes with interesting selective permeation characteristics. Among two-dimensional materials, graphenes and hexagonal boron nitride (h-BN) are the most promising membrane materials, which can even allow the separation of proton isotopes. The current work aims at understanding the higher reported permeability of h-BN by sequential doping of B and N atoms in graphene nanoflakes. The kinetic barriers were calculated with two different models of graphenes; coronene and dodecabenzocoronene via zero-point energy calculations at the transition state for proton permeability. The lower barriers for h-BN are mainly due to boron atoms. The trends of kinetic barriers are B < BN < N-doped graphenes. The permeation selectivity of graphene models increases with doping. Our studies suggest that boron-doped graphene models show an energy barrier of 0.04 eV for the permeation of proton, much lower than that of the model graphene and h-BN sheet, while nitrogen-doped graphenes have a very high energy barrier up to 7.44 eV for permeation. Therefore, boron-doped graphene models are suitable candidates for proton permeation. Moreover, the presence of carbon atoms in the periphery of BN sheets has significant neg. effects on the permeation of proton isotopes, an unexplored dimension of the remote neighboring effect in 2-D materials. This study illustrates the need for permeation study through other hetero-2D surfaces, where interesting hidden chem. is still unexplored.

RSC Advances published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Safety of Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Caumo, Sofia published the artcileParticulate matter-bound organic compounds: levels, mutagenicity, and health risks, SDS of cas: 191-07-1, the publication is Environmental Science and Pollution Research (2022), 29(21), 31293-31310, database is CAplus and MEDLINE.

Increased industrialization and consumption of fossil fuels in the Metropolitan Region of SaoPaulo (MRSP), Brazil, have caused a growth of the particulate matter emissions to the atm. and an increase in population health problems. Particulate and gaseous phase samples were collected in different short campaigns (2015, 2016, and 2017) near an urban-industrial area. Organic carbon (OC), elemental carbon (EC), polycyclic aromatic hydrocarbons (PAH), and its derivatives (nitro and oxy-PAH), n-alkanes, hopanes, and pesticides were determined The Salmonella/microsome test confirmed the mutagenic activity of these samples. Among PAH, benzo(a)pyrene was detected as one of the most abundant compounds Benzo(a)pyrene equivalent concentrations for PAH and nitro-PAH, and the associated risk of lung cancer, showed values above those recommended in the literature. The profile of n-alkanes confirmed the predominance of anthropogenic sources. Pesticide concentrations and estimated risks, such as the daily inhalation exposure and hazard quotient, suggest that exposure to these compounds in this area may be dangerous to human health.

Environmental Science and Pollution Research published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, SDS of cas: 191-07-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhang, Qijun published the artcilePM_2.5-PAHs and PM₁₀-PAHs at roadside environment: levels, meteorological impact, source apportionment, and health risks, Recommanded Product: Coronene, the publication is Air Quality, Atmosphere & Health (2022), 15(7), 1287-1301, database is CAplus.

Polycyclic aromatic hydrocarbon (PAH) concentrations in PM₁₀ and PM_2.5 were measured at the roadside of 4 typical urban roads in Tianjin from Jan. to August 2015. The medium flow samplers with pretreated quartz filters were used for particulate matter sampling. Eighteen PAHs were analyzed by gas chromatog.-mass spectrometry. The concentrations of PM_2.5-PAHs and PM₁₀-PAHs in winter were 74.98 ng/m³ and 94.22 ng/m³, followed by spring and the lowest in summer. The traffic flow is pos. correlated with benzo(a)pyrene, benzo(g,h,i)perylene, and coronene. The vehicle speed and temperature are significantly pos. correlated with low-ring polycyclic aromatic hydrocarbons and neg. correlated with the middle- and high-cyclic aromatic hydrocarbons. The ratio anal. of some PM_2.5-PAHs and PM₁₀-PAHs suggests that gasoline and diesel vehicles were the major sources of the studied area. Industrial emission, vehicle exhaust, and vehicle non-exhaust (tire wear, brake pad wear, and road dust) were identified as the major sources of roadside PAHs using pos. matrix factorization anal. The incremental lifetime cancer risk of ingestion and dermal contact were higher than that of inhalation, indicating that ingestion and dermal contact were the primary exposure routes for cancer. Therefore, it is necessary to take measures to strictly control the PM-PAHs pollution emitted by motor vehicles and formulate standards for PM-PAHs emitted by vehicles.

Air Quality, Atmosphere & Health published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C10H16O2, Recommanded Product: Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Li, Jie published the artcileEmission characteristics and assessment of potential health risks on PM_2.5-bound organics from incense burning, Safety of Coronene, the publication is Atmospheric Pollution Research (2022), 13(3), 101326, database is CAplus.

Incense burning is a nonnegligible indoor air pollution source in many Asian countries, particularly in China. There is a lack of regulation on the formations of incense and its emissions. Herein, the emission factors (EFs) of important particulate phase toxic compounds, parent polycyclic aromatic hydrocarbons (pPAHs), alkylated PAHs (APAHs), oxygenated PAHs (OPAHs), nitro PAHs (NPAHs), and cyclohexanes were determined from the burning of the most representative types of Chinese incenses (i.e., five Nimu Tibetan incenses [NTI], one ordinary smoke incense [SI], and one smoke-free incense [SFI]). The total EFs of the quantified organic species (EF_¦²organics) for NTI was 7.44 ¡À 2.72 ¦Ìg g^-1 on average, within the levels of SI to SFI. The pPAHs showed the largest proportion (41.5%-63.7%) of the total quantified organics The total cancer risks for all examined incenses severely exceeded the health risk threshold value of 1 x 10^-4, verifying that incense burning poses certain extent damage to human health. Notably, the organic compositions of NTI and SFI burnings were similar, with lower EFs and inhalation lifetime cancer risks than SI. The present results suggest that the advanced types of incenses of NTI or SFI should be better choices than SI while the incense burning is necessary. This acts as a guide for the residents, visitors, and workers in the selections of incenses that offer lower toxic substances emissions in dwellings or temples. In addition, the high health risks for incense emissions alert the establishment of more restrictive regulations on incense production and emission are compulsory.

Atmospheric Pollution Research published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Safety of Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Fox, C. P. published the artcileFlame out! End-Triassic mass extinction polycyclic aromatic hydrocarbons reflect more than just fire, Recommanded Product: Coronene, the publication is Earth and Planetary Science Letters (2022), 117418, database is CAplus.

Global warming induced-wildfires of the 21st century reveal the catastrophic effects that widespread biomass burning has on flora and fauna. During mass extinction events, similar wildfire episodes are considered to play an important role in driving perturbations in terrestrial ecosystems. To better evaluate the record of biomass burning and potential carbon cycle feedbacks at the end-Triassic mass extinction (~202 Ma; ETE), we investigated the relative abundances of a range of polycyclic aromatic hydrocarbons (PAHs) and the ¦Ä13C values of regular isoprenoids and n-alkanes at key sections in the SW UK. These data reveal little evidence for intensive wildfire activity during the extinction event, in contrast to what has been reported elsewhere in European, Chinese, and Greenland ETE sections. Herein, PAHs instead reflect greater contributions from an episode of soil erosion that we attribute to Large Igneous Province (LIP)-driven acid rain, and possible distal sources of smoke, suggestive of fire elsewhere in the UK/European basins. This terrestrial ecosystem perturbation is coincident with those in the marine realm, indicating ecosystem perturbations occurred across multiple habitats throughout the latest Rhaetian in the SW UK. Addnl., this geochem. approach reveals that the precursor carbon isotope excursion (CIE) routinely used in chemostratigraphic correlations is unrelated to LIP activity, but instead results from the increased input of terrestrially derived 13C-depleted plant material. Furthermore, we find the initial CIE (commonly used to mark the extinction level, but which is now known to precede the ETE) is also unrelated to biomass burning. Collectively, these data reveal that processes other than combustion of terrestrial material are important for the terrestrial phase of the ETE in the SW UK. Similar investigations are required on other ETE sections, both those in close proximity to the LIP driving the extinction and those further afield, to more clearly determine the neg. effect(s) of LIPs and their geog. extent in the terrestrial realm.

Earth and Planetary Science Letters published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Recommanded Product: Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lei, Yali published the artcileCharacteristics and health risks of parent, alkylated, and oxygenated PAHs and their contributions to reactive oxygen species from PM_2.5 vehicular emissions in the longest tunnel in downtown Xi¡äan, China, Related Products of catalysis-chemistry, the publication is Environmental Research (2022), 212(Part_C), 113357, database is CAplus and MEDLINE.

A vehicular emission study was conducted in the longest inner-city tunnel in Xi¡äan, northwestern China in four time periods (I: 07:30-10:30, II: 11:00-14:00, III: 16:30-19:30, and IV: 20:00-23:00 LST). A sum of 40 PAHs, including parent (p-PAHs), alkylated (a-PAHs), and oxygenated (o-PAHs) in fine particulate matter (PM_2.5) were quantified. The relationships between the PAHs and the formation of reactive oxygen species (ROS) were also studied. The average total quantified PAHs concentration was 236.3 ¡À 48.3 ng m^-3. The p-PAHs were found to be the most dominated group, accounting for an average of 88.1% of the total quantified PAHs, followed by a-PAHs (6.1%) and o-PAHs (5.8%). On the base of the number of aromatic rings, the groups of ¡Ü5 rings (92.5 ¡À 1.2%) had higher fractions than the high ones (¡Ý6 rings, 7.5 ¡À 1.2%) for pPAHs. Diurnal variations of PAHs subgroups exhibited the highest levels in Period III, consistent with the largest traffic counts in evening rush hours. However, less reduction of few PAHs in the night period demonstrates that the emissions of compressed natural gas (CNG) and methanol-fueled vehicles cannot be ignored while their contribution increased. High ROS activity levels were observed in the traffic-dominated samples, implying the potential oxidative damages to humans. Addnl., diurnal variation of the ROS activity was consistent with the total quantified PAHs and toxic equivalency of benzo[a]pyrene. Good correlations (R > 0.6, p < 0.05) were seen between individual groups of PAHs (especially for 3-5 rings p-PAHs, 4 rings a-PAHs, and 2-3 rings o-PAHs) and ROS activity, supporting that the vehicular emitted PAHs possibly initiate oxidative stress. The multiple linear regression anal. further illustrated that chrysene contributed the highest (25.0%) to ROS activity. In addition to highlighting the potential hazards to the PAHs from the vehicular emission, their roles to mitigate the health effects by formations of ROS were firstly reported in northwestern China.

Environmental Research published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wu, Huang published the artcileA contorted nanographene shelter, HPLC of Formula: 191-07-1, the publication is Nature Communications (2021), 12(1), 5191, database is CAplus and MEDLINE.

Abstract: Nanographenes have kindled considerable interest in the fields of materials science and supramol. chem. as a result of their unique self-assembling and optoelectronic properties. Encapsulating the contorted nanographenes inside artificial receptors, however, remains challenging. Herein, we report the design and synthesis of a trigonal prismatic hexacationic cage, which has a large cavity and adopts a relatively flexible conformation. It serves as a receptor, not only for planar coronene, but also for contorted nanographene derivatives with diameters of approx. 15 ? and thicknesses of 7 ?. A comprehensive investigation of the host-guest interactions in the solid, solution and gaseous states by experimentation and theor. calculations reveals collectively an induced-fit binding mechanism with high binding affinities between the cage and the nanographenes. Notably, the photostability of the nanographenes is improved significantly by the ultrafast deactivation of their excited states within the cage. Encapsulating the contorted nanographenes inside the cage provides a noncovalent strategy for regulating their photoreactivity.

Nature Communications published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C18H26ClN3O, HPLC of Formula: 191-07-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lv, Qiang published the artcileLattice-mismatch-free growth of organic heterostructure nanowires from cocrystals to alloys, Recommanded Product: Coronene, the publication is Nature Communications (2022), 13(1), 3099, database is CAplus and MEDLINE.

Organic heterostructure nanowires, such as multiblock, core/shell, branch-like and related compounds, have attracted chemists¡ä extensive attention because of their novel physicochem. properties. However, owing to the difficulty in solving the lattice mismatch of distinct mols., the construction of organic heterostructures at large scale remains challenging, which restricts its wide use in future applications. In this work, we define a concept of lattice-mismatch-free for hierarchical self-assembly of organic semiconductor mols., allowing for the large-scale synthesis of organic heterostructure nanowires composed of the organic alloys and cocrystals. Thus, various types of organic triblock nanowires are prepared in large scale, and the length ratio of different segments of the triblock nanowires can be precisely regulated by changing the stoichiometric ratio of different components. These results pave the way towards fine synthesis of heterostructures in a large scale and facilitate their applications in organic optoelectronics at micro/nanoscale.

Nature Communications published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Recommanded Product: Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Park, Kwang-Won published the artcileLarge-Area Heteroepitaxial Nanostructuring of Molecular Semiconductor Films for Enhanced Optoelectronic Response in Flexible Electronics, Recommanded Product: Coronene, the publication is Advanced Functional Materials (2022), 32(22), 2113085, database is CAplus.

Organized nano- and microstructures of mol. semiconductors display interesting optical and photonic properties, and enhanced charge carrier mobilities, as compared to disordered thin films. However, known directed-growth and self-organization strategies cannot create structured mol. heterojunctions and cannot be practically incorporated into existing device fabrication routines to create large-area optoelectronic devices. Here, an ultrathin (<2 nm) seed layer of the compound coronene creates 1D nanostructures of an electron-transporting mol. (IFD) is shown, which possesses an intrinsic proclivity to form disordered thin films in the absence of the seed layer. It is revealed that nanostructured IFD films exhibit enhanced light absorption and emission, and greater electron mobilities, as compared to amorphous counterparts. This seed layer strategy creates uniform IFD nanowires over large areas of up to 18 mm² at low processing temperatures Notably, the coronene seed layer creates IFD nanowires when applied over either oxide surfaces or predeposited organic layers, meaning that this structuring approach can be integrated into diode manufacturing routines to realize large-area flexible optoelectronic devices. Flexible organic light-emitting diodes and fullerene-free organic solar cells containing IFD nanowires in the photoactive layer to demonstrate that mol. nanostructures can lead to robust, large-area device arrays on flexible substrates being fabricated.

Advanced Functional Materials published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Recommanded Product: Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia