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- Title
Synthesis of Polycyclic Aromatic Hydrocarbons by Phenyl Addition–Dehydrocyclization: The Third Way.
- Authors
Zhao, Long; Prendergast, Matthew B.; Kaiser, Ralf I.; Xu, Bo; Ablikim, Utuq; Ahmed, Musahid; Sun, Bing‐Jian; Chen, Yue‐Lin; Chang, Agnes H. H.; Mohamed, Rana K.; Fischer, Felix R.
- Abstract
Polycyclic aromatic hydrocarbons (PAHs) represent the link between resonance‐stabilized free radicals and carbonaceous nanoparticles generated in incomplete combustion processes and in circumstellar envelopes of carbon rich asymptotic giant branch (AGB) stars. Although these PAHs resemble building blocks of complex carbonaceous nanostructures, their fundamental formation mechanisms have remained elusive. By exploring these reaction mechanisms of the phenyl radical with biphenyl/naphthalene theoretically and experimentally, we provide compelling evidence on a novel phenyl‐addition/dehydrocyclization (PAC) pathway leading to prototype PAHs: triphenylene and fluoranthene. PAC operates efficiently at high temperatures leading through rapid molecular mass growth processes to complex aromatic structures, which are difficult to synthesize by traditional pathways such as hydrogen‐abstraction/acetylene‐addition. The elucidation of the fundamental reactions leading to PAHs is necessary to facilitate an understanding of the origin and evolution of the molecular universe and of carbon in our galaxy.
- Subjects
CARBONACEOUS aerosols; POLYCYCLIC aromatic hydrocarbons; MOLECULAR weights; MOLECULAR evolution; ASTROCHEMISTRY; FREE radicals; HIGH temperatures; NAPHTHALENE
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 48, p17603
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201909876