title: Dielectric relaxation of long-chain glass-forming monohydroxy alcohols.
abstract: The dielectric relaxation of two long-chain glass forming monohydroxy alcohols, 2-butyl-1-octanol and 2-hexyl-1-decanol, is studied at low temperature. Remarkable broadening from the pure Debye relaxation is identified for the slowest dynamics, differing from the dielectric spectra of short-chain alcohols. The broadening of the Debye-like relaxation in the two liquids develops as temperature increases, and the approaching of the Debye-like and structural relaxation widths is shown. Similar results are observed in the dielectric spectra of dilute 2-ethyl-1-hexanol in either 2-hexyl-1-decanol or squalane. The results of the liquids and mixtures reveal a correlation between the broadening and the Debye-like relaxation strength. Molecular associations in monohydroxy alcohols are discussed with the modification of the Debye relaxation.
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
authors.forename: Yanqin
authors.initials: Y
authors.lastname: Gao
authors.forename: Wenkang
authors.initials: W
authors.lastname: Tu
authors.forename: Zeming
authors.initials: Z
authors.lastname: Chen
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Tian
authors.forename: Riping
authors.initials: R
authors.lastname: Liu
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Wang