Hexakis(2,3,6-tri-O-methyl)-α-cyclodextrin-I₅ ^- complex in aqueous I^-/I₃ ^- thermocells and enhancement in the Seebeck coefficient.

ABSTRACT: A large Seebeck coefficient (S _e) of 1.9 mV K^-1 was recorded for the I^-/I₃ ^- thermocell by utilizing the host-guest complexation of hexakis(2,3,6-tri-O-methyl)-α-cyclodextrin (Me₁₈-α-CD) with the oxidized iodide species. The thermocell measurement and UV-vis spectroscopy unveiled the formation of an Me₁₈-α-CD-pentaiodide (I₅ ^-) complex, which is in remarkable contrast to the triiodide complex α-CD-I₃ ^- previously reported. Although the precipitation of the α-CD-I₃ ^- complex in the presence of an electrolyte such as potassium chloride is a problem in thermocells, this issue was solved by using Me₁₈-α-CD as a host compound. Th

SUBMITTER: Liang Y 

PROVIDER: S-EPMC6340408 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature