Communication
Full Access
Aliphatic Polyethers, Basic Building Blocks from Naturally Occurring Humic Substances: Detection by Solid State 13C-NMR Spectroscopy†
†
Dr. D. Müller, Bruker Analytische Messtechnik, Rheinstetten, is thanked for the NMR spectra.
Abstract
The structure of humic substances has long been a subject of controversy. In particular, their higher oxygen content could not be explained. Studies in solution did little to help. CP-MAS-13C-NMR spectroscopy of the substances in the solid state has now permitted precise assignment of the structural elements. Aliphatic part-structures comprise the framework of humic substances; of the oxygen-containing groups, aliphatic ethers dominate.—These findings are also of importance in understanding the genesis of fossil fuels.
