title: Striking structural transformation from cyclic oligosaccharide to aromatic series by means of the effect of lithium carbonate based on gas chromatography coupled to time-of-flight mass spectrometry.
abstract: An interesting paradigm in which the conformation of glucopyranose of beta-CD in the presence of Li(2)CO(3) is transformed into both an aromatic structure, such as the heterocyclic compound C(6)H(6)O(+) with a prominent relative abundance (RA) and the tropylium ions C(3)H(3)(+), C(5)H(5)(+), and C(7)H(7)(+) at comparatively low temperatures, and a linear structure such as C(18)H(30)O(+) and C(4)H(10)O(3)(+) is reported in the present work. The efficient transformation (higher RA, lower temperature) from a sugar structure to an aromatic structure is ascribed to the contribution of the molecule-ion interaction between beta-CD and Li(2)CO(3). Such a transformation is significant because it provides new insight into the link between supramolecular chemistry and other fields such as organic synthesis, biomineralization, environmental protection, and energy utilization.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei, 230026 Anhui, China. solexin@ustc.edu.cn
authors.forename: Le Xin
authors.initials: le X
authors.lastname: Song
authors.forename: Lei
authors.initials: L
authors.lastname: Bai