Homolytic aromatic substitution. VIII. Phenylation of polycyclic aromatic hydrocarbons

1973 ◽  
Vol 95 (14) ◽  
pp. 4624-4632 ◽  
Author(s):  
S. Carlton. Dickerman ◽  
William M. Feigenbaum ◽  
Michael. Fryd ◽  
Norman. Milstein ◽  
George B. Vermont ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Aromatic Substitution ◽  
Homolytic Aromatic Substitution ◽  
Polycyclic Aromatic

The Pyrolysis of ωω'-Diphenylalkanes

1962 ◽  
Vol 15 (1) ◽  
pp. 89 ◽  
Author(s):  
JW Sweating ◽  
JFK Wilshire
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Liquid Chromatography ◽  
Aromatic Hydrocarbons ◽  
Gas Liquid Chromatography ◽  
Partition Chromatography ◽  
Aromatic Substitution ◽  
Homolytic Aromatic Substitution ◽  
Aliphatic Carbon ◽  
Polycyclic Aromatic ◽  
Radical Processes

The pyrolysis of several ωω'-diphenylalkanes, C6H5(CH2)nC6H5, where n=1, 2, 3, 4, and 6, has been studied over a range of temperatures (550, 600, 650, and 700 �C). The products were analysed by a combination of gas-liquid chromatography, chromatography on alumina, and partition chromatography on acetylated cellulose. Below 700 �C, scission of the aliphatic carbon bonds was solely observed, whereas at 700 �C there were formed, in addition, polycyclic aromatic hydrocarbons arising from radical processes such as dimerization, intramolecular cyclization, and homolytic aromatic substitution (e.g. phenanthrene, chrysene, triphenylene, and 3,4-benzpyrene). The mode of formation of these and other products is discussed.

ChemInform Abstract: HOMOLYTIC AROMATIC SUBSTITUTION PART 8, PHENYLATION OF POLYCYCLIC AROMATIC HYDROCARBONS

1973 ◽  
Vol 4 (37) ◽  
pp. no-no
Author(s):  
S. CARLTON DICKERMAN ◽  
WILLIAM M. FEIGENBAUM ◽  
MICHAEL FRYD ◽  
NORMAN MILSTEIN ◽  
GEORGE B. VERMONT ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Aromatic Substitution ◽  
Homolytic Aromatic Substitution ◽  
Polycyclic Aromatic

The Assessment of Contamination and Source of Polycyclic Aromatic Hydrocarbons from the Sediments of the Someş River

2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

EMISSION OF POLYCYCLIC AROMATIC HYDROCARBONS CONTAINED IN COMBUSTION PRODUCTS OF GASOLINE ENGINES

2018 ◽  
Vol 62 (3) ◽  
pp. 341-346 ◽  
Author(s):  
M. Assad ◽  
V. V. Grushevski ◽  
O. G. Penyazkov ◽  
I. N. Tarasenko
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
High Speed ◽  
Internal Combustion Engines ◽  
Catalytic Converter ◽  
Combustion Products ◽  
Chromatography Method ◽  
Exhaust Gases ◽  
Polycyclic Aromatic ◽  
Load Mode

The concentration of 16 polycyclic aromatic hydrocarbons (PAHs) in the gasoline combustion products emitted into the atmosphere by internal combustion engines (ICE) has been measured using the gas chromatography method. The concentrations of PAHs in the exhaust gases sampled behind a catalytic converter has been determined when the ICE operates in five modes: idle mode, high speed mode, load mode, ICE cold start mode (engine warm-up) and transient mode. Using 92 RON, 95 RON and 98 RON gasoline the effect of the octane number of gasoline on the PAHs content in the exhaust gases has been revealed. The concentration of the most carcinogenic component (benzo(α)pyrene) in the exhaust gases behind a catalytic converter significantly exceeds a reference value of benzo(α)pyrene in the atmospheric air established by the WHO and the EU for ICE in the load mode.

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