H
Hai-Chou Chang
Researcher at National Dong Hwa University
Publications - 45
Citations - 1256
Hai-Chou Chang is an academic researcher from National Dong Hwa University. The author has contributed to research in topics: Ionic liquid & Hydrogen bond. The author has an hindex of 20, co-authored 40 publications receiving 1208 citations. Previous affiliations of Hai-Chou Chang include National Taiwan University of Science and Technology & Technische Universität München.
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Journal ArticleDOI
Infrared Spectra of H+(H2O)5-8 Clusters: Evidence for Symmetric Proton Hydration
Jyh-Chiang Jiang,Yi-Sheng Wang,Hai-Chou Chang,Sheng H. Lin,Yuan T. Lee,Gereon Niedner-Schatteburg,Huan-Cheng Chang +6 more
TL;DR: In this article, a vibrational predissociation spectroscopy and ab initio calculations of protonated water clusters from a supersonic expansion were performed at the B3LYP/6-31+G* level.
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Hydrogen bond stabilization in 1,3-dimethylimidazolium methyl sulfate and 1-butyl-3-methylimidazolium hexafluorophosphate probed by high pressure: the role of charge-enhanced C-H...O interactions in the room-temperature ionic liquid.
TL;DR: The results indicated that the imidazolium C-H groups are more favorable sites for hydrogen bonding than the methyl C- H groups in the pure 1,3-dimethylimidazolate methyl sulfate/D(2)O mixture.
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Structural organization in aqueous solutions of 1-Butyl-3-methylimidazolium halides: a high-pressure infrared spectroscopic study on ionic liquids.
Hai-Chou Chang,Jyh-Chiang Jiang,Chao-Yen Chang,Jong-Chang Su,Chao-Hsin Hung,You-Chang Liou,Sheng Hsien Lin +6 more
TL;DR: High-pressure infrared spectroscopy was applied to study the hydrogen-bonding structures of 1-butyl-3-methylimidazolium halides/D2O mixtures and revealed that the characteristic bonded C2-H vibration may be shifted via the modification of C 2-H-Cl- associations.
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Evidence of rotational isomerism in 1-butyl-3-methylimidazolium halides: a combined high-pressure infrared and Raman spectroscopic study.
TL;DR: Density-functional-theory-calculated results also support the high-pressure results that the methyl and butyl C-H groups are suitable proton donor sites for the GA conformer.
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C−H- - -O Hydrogen Bonds in β-Sheetlike Networks: Combined X-ray Crystallography and High-Pressure Infrared Study
Kwang Ming Lee,Hai-Chou Chang,Jyh-Chiang Jiang,Jack C. C. Chen,Hsiang-En Kao,Sheng Hsien Lin,Ivan J. B. Lin +6 more
TL;DR: Close interactions of the Cα−H-H- -O type have been analyzed via X-ray crystallography and high-pressure infrared spectroscopy as discussed by the authors.