High temperature behavior of alternant and nonalternant polycyclic aromatic hydrocarbons

Necula, Atena; Scott, Lawrence T.

doi:10.1016/s0165-2370(99)00085-6

Cited by 53 publications

(43 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous FVP studies revealed a low conversion of 10 to 11, and when 11 is formed it can rearrange to form cyclopenta[cd ]pyrene (12). [48,49] Benzo[c]phenanthrene (10) also rearranges under these conditions to afford chrysene (13), which was discovered by Necula and Scott in unpublished work. Using our new technique, the pyrolysis of compound 10 was investigated at various hexanes vapour concentrations.…”

Section: Resultsmentioning

confidence: 89%

“…All FVPs were done according to the procedure developed by Necula and Scott. [13] To ensure an accurate view of the product distributions limited purification was done on each sample. Typically samples were passed through a silica gel plug with dichloromethane as the eluent.…”

Section: General Experimental Proceduresmentioning

confidence: 99%

“…Flash vacuum pyrolysis (FVP) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] has become an integral part of the synthesis of both flat and curved polycyclic aromatic hydrocarbons (PAHs), most notably in the synthesis of circumtrindene (1), [17,18] Buckminsterfullerene (C 60 ), [19,20] and the recent chemical synthesis of a [5,5] carbon nanotube endcap. [21] The current strategy to create PAHs by FVP relies on using pyrolytic precursors that will lose one or more halogens at elevated temperatures (500-13008C) by the rupture of Ar-X bonds to create aryl radicals.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Use of External Radical Sources in Flash Vacuum Pyrolysis to Facilitate Cyclodehydrogenation Reactions in Polycyclic Aromatic Hydrocarbons

Amick

Martin

2014

Aust. J. Chem.

View full text Add to dashboard Cite

A new process to facilitate the cyclodehydrogenation of polycyclic aromatic hydrocarbons (PAHs) in flash vacuum pyrolysis (FVP) using an external radical source is described. Using hexanes as an external radical source the conversion of various PAHs to their cyclodehydrogenated products is vastly increased. Various other volatile organic compounds were also examined to determine their ability to act as external radical sources in FVP.

show abstract

Section: Resultsmentioning

confidence: 89%

Section: General Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Use of External Radical Sources in Flash Vacuum Pyrolysis to Facilitate Cyclodehydrogenation Reactions in Polycyclic Aromatic Hydrocarbons

Amick

Martin

2014

Aust. J. Chem.

View full text Add to dashboard Cite

show abstract

“…These molecules are known reaction products in sooting flames [57][58][59][60][61][62][63] and other combustion processes. 64,65 To a first approximation, soot particles can be thought of as small pieces of graphite that grow due to successive additions of acetylene to a radical species followed by cyclization.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of Small Polycyclic Aromatic Hydrocarbons on Graphite: A Combined Scanning Tunneling Microscopy and Theoretical Approach

et al. 2005

View full text Add to dashboard Cite

Self-assembled monolayers of chrysene and indene on graphite have been observed and characterized individually with scanning tunneling microscopy (STM) at 80 K under low-temperature, ultrahigh vacuum conditions. These molecules are small, polycyclic aromatic hydrocarbons (PAHs) containing no alkyl chains or functional groups that are known to promote two-dimensional self-assembly. Energy minimization and molecular dynamics simulations performed for small groups of the molecules physisorbed on graphite provide insight into the monolayer structure and forces that drive the self-assembly. The adsorption energy for a single chrysene molecule on a model graphite substrate is calculated to be 32 kcal/mol, while that for indene is 17 kcal/mol. Two distinct monolayer structures have been observed for chrysene, corresponding to highand low-density assemblies. High-resolution STM images taken of chrysene with different bias polarities reveal distinct nodal structure that is characteristic of the molecular electronic state(s) mediating the tunneling process. Density functional theory calculations are utilized in the assignment of the observed electronic states and possible tunneling mechanism. These results are discussed within the context of PAH and soot particle formation, because both chrysene and indene are known reaction products from the combustion of small hydrocarbons. They are also of fundamental interest in the fields of nanotechnology and molecular electronics.

show abstract

“…These are organic contaminants that are resistant to degradation and can remain in the environment for long periods [4]. The notion that PAHs are inert entities even at high temperatures has been rarely questioned by chemists [5]. PAHs are known to pollute air, soil and water resources (even low concentrations are found to be toxic), exhibiting high thermal stability and persistence in soil and groundwater [6].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Oxidation and Reduction of Polycyclic Aromatic Hydrocarbons (PAHs) Present as Mixtures in Hydrothermal Media

Nkansah

Christy

Barth

2012

Polycyclic Aromatic Compounds

View full text Add to dashboard Cite

show abstract

High temperature behavior of alternant and nonalternant polycyclic aromatic hydrocarbons

Cited by 53 publications

References 63 publications

Use of External Radical Sources in Flash Vacuum Pyrolysis to Facilitate Cyclodehydrogenation Reactions in Polycyclic Aromatic Hydrocarbons

Use of External Radical Sources in Flash Vacuum Pyrolysis to Facilitate Cyclodehydrogenation Reactions in Polycyclic Aromatic Hydrocarbons

Self-Assembly of Small Polycyclic Aromatic Hydrocarbons on Graphite: A Combined Scanning Tunneling Microscopy and Theoretical Approach

Catalytic Oxidation and Reduction of Polycyclic Aromatic Hydrocarbons (PAHs) Present as Mixtures in Hydrothermal Media

Contact Info

Product

Resources

About