Carbon K-edge X-ray Raman spectroscopy supports simple, yet powerful description of aromatic hydrocarbons and asphaltenes

Autor:	Stephen P. Cramer, Pieter Glatzel, Oliver C. Mullins, Uwe Bergmann, John C. Fetzer, Henning Groenzin
Rok vydání:	2003
Předmět:	Electron density Chemistry X-ray Analytical chemistry General Physics and Astronomy chemistry.chemical_element Ring (chemistry) symbols.namesake K-edge symbols Molecule Physical and Theoretical Chemistry Raman spectroscopy Carbon Asphaltene
Zdroj:	Chemical Physics Letters. 369:184-191
ISSN:	0009-2614
DOI:	10.1016/s0009-2614(02)02003-1
Popis:	The nature and distribution of electron density in polycyclic aromatic hydrocarbons (PAHs) determines PAH properties. Theoretical investigations have yielded simple heuristics to describe the π electron distribution in complex PAHs, but systematic experimental support is lacking. Here, we show that using the novel approach of carbon K-edge X-ray Raman spectroscopy (XRRS), carbon type in PAHs can be probed directly. Our unique detector has enabled application of XRRS on PAHs and asphaltenes. XRRS results directly support the powerful ‘aromatic sextet’ description of PAHs. Also, XRRS is shown to establish geometries of aromatic ring systems in asphaltenes, a complex natural carbonaceous material.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::70a4fa5a342880d5122dbab3061adf2b https://doi.org/10.1016/s0009-2614(02)02003-1 Zobrazit plný text záznamu Full Text from ScienceDirect