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Dielectric relaxation of long-chain glass-forming monohydroxy alcohols.
MedLine Citation:
PMID:  24182046     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
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:
Yanqin Gao; Wenkang Tu; Zeming Chen; Yongjun Tian; Riping Liu; Li-Min Wang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of chemical physics     Volume:  139     ISSN:  1089-7690     ISO Abbreviation:  J Chem Phys     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-11-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375360     Medline TA:  J Chem Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  164504     Citation Subset:  IM    
Affiliation:
State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
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