2020/05/01 by Franco Cataldo, F. Cataldo, D. A. García-Hernández +3
Chemistry · Engineering · Physics and Astronomy · #Anthracite #Astrophysics and Star Formation Studies #Carbon fibers #Coal #Energetic Materials and Combustion #Fullerene #Fullerene Chemistry and Applications #Heteroatom #Infrared #Organic matter #Petroleum #Soot #astro-ph.GA #astro-ph.SR #physics.space-ph
paper · pdf · doi:10.1007/s10509-020-03795-5
Invited review article accepted for a special issue of Astrophys. Space Sci. devoted to "Unexplained Spectral Phenomena in the ISM" (manuscript number: ASTR-D-20-00110R2) (23 pages, 4 figures, 2 schemes, and 2 tables)
openalex publication_date 2020/05/01 · arxiv created 2020/05/03 · openalex created_date 2020/05/13 · arxiv updated 2020/05/27 · openalex updated_date 2026/08/05
The petroleum and coal models of the unidentified infrared emissions (UIE), sometimes referred also as unidentified infrared bands (UIBs) has been reviewed mainly based on the work of the authors with the inclusion of unpublished results. It is shown that the petroleum and coal model of the UIE converges and merges quite well with the MAON (Mixed Aromatic Aliphatic Organic Nanoparticles) model of the UIE. It is shown that the thermal treatment of various substrates like PAHs, alkylated PAHs but also mixed aliphatic/olefinic substrates leads invariable to carbonaceous materials matching the infrared spectrum of anthracite coal or certain petroleum fractions. Thus, the experimental thermal processing (which under space conditions could be equivalent to the expected processing by shock waves or high energy radiation) of mixed aromatic/aliphatic organic matter can be used to match also the UIE evolution. Another way to simulate the thermal/radiation processing of organic matter in space, can be achieved through the carbon arc. Simple substrates processed in this way produce carbon soot and a plethora of organic molecules. Fullerenes are found in space both through mid-infrared and optical spectroscopy and it is very likely that other complex related species such as endohedral fullerenes (i.e. fullerenes with a metal, heteroatom or molecules inside the cage) may be formed in space. After all, their formation requires the same conditions as those needed for fullerene formation provided that also a metal vapour (e.g. interstellar/circumstellar gas) is available. The last part of this review is thus dedicated to the recent results on the study and characterization of an endohedral C60 derivative containing lithium inside the cage.