Gas-Phase Synthesis of Triphenylene (C18H12)
- Univ. of Hawaii at Manoa, Honolulu, HI (United States). Dept. of Chemistry; University of Hawaii at Manoa
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division
- Samara National Research Univ. (Russia)
- Samara National Research Univ. (Russia); Lebedev Physical Inst. of RAS, Samara (Russia). Dept. of Chemical and Electric Discharge Lasers
- Florida International Univ., Miami, FL (United States). Dept. of Chemistry and Biochemistry
- Samara National Research Univ. (Russia); Florida International Univ., Miami, FL (United States). Dept. of Chemistry and Biochemistry
- Univ. of Hawaii at Manoa, Honolulu, HI (United States). Dept. of Chemistry
For the last decades, the hydrogen-abstraction-acetylene-addition (HACA) mechanism has been widely invoked to rationalize the high-temperature synthesis of PAHs as detected in carbonaceous meteorites (CM) and proposed to exist in the interstellar medium (ISM). By unravelling the chemistry of the 9-phenanthrenyl radical ([C14H9]$$^\bullet$$) with vinylacetylene (C4H4) during our work, we present the first compelling evidence of a barrier-less pathway leading to a prototype tetracyclic PAH – triphenylene (C18H12) – via an unconventional hydrogen abstraction–vinylacetylene addition (HAVA) mechanism operational at temperatures as low as 10 K. The barrier-less, exoergic nature of the reaction reveals HAVA as a versatile reaction mechanism that may drive molecular mass growth processes to PAHs and even two-dimensional, graphene-type nanostructures in cold environments in deep space thus leading to a better understanding of the carbon chemistry in our universe through the untangling of elementary reactions on the most fundamental level.
- Research Organization:
- Univ. of Hawaii, Honolulu, HI (United States); Florida International Univ., Miami, FL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; Ministry of Education and Science of the Russian Federation
- Grant/Contract Number:
- FG02-03ER15411; FG02-04ER15570; AC02-05CH11231
- OSTI ID:
- 1603092
- Alternate ID(s):
- OSTI ID: 1608266
OSTI ID: 1494647
- Journal Information:
- ChemPhysChem, Journal Name: ChemPhysChem Journal Issue: 6 Vol. 20; ISSN 1439-4235
- Publisher:
- ChemPubSoc EuropeCopyright Statement
- Country of Publication:
- United States
- Language:
- English
How to add a five-membered ring to polycyclic aromatic hydrocarbons (PAHs) – molecular mass growth of the 2-naphthyl radical (C 10 H 7 ) to benzindenes (C 13 H 10 ) as a case study
|
journal | January 2019 |
A combined experimental and computational study on the reaction dynamics of the 1-propynyl radical (CH 3 CC; X 2 A 1 ) with ethylene (H 2 CCH 2 ; X 1 A 1g ) and the formation of 1-penten-3-yne (CH 2 CHCCCH 3 ; X 1 A′)
|
journal | January 2019 |