Synthesis of Polycyclic Aromatic Hydrocarbons by Phenyl Addition–Dehydrocyclization: The Third Way
| Autor: | Yue-Lin Chen, Matthew B. Prendergast, Musahid Ahmed, Bo Xu, Utuq Ablikim, Ralf I. Kaiser, Bing-Jian Sun, Agnes H. H. Chang, Felix R. Fischer, Rana K. Mohamed, Long Zhao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Fluoranthene
Biphenyl Reaction mechanism 010405 organic chemistry Radical chemistry.chemical_element Triphenylene General Chemistry 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Computational chemistry Asymptotic giant branch Carbon Naphthalene |
| Zdroj: | Angewandte Chemie International Edition. 58:17442-17450 |
| ISSN: | 1521-3773 1433-7851 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text