2011 Fiscal Year Final Research Report
Molecular interpretation of the hydrophobic hydration of the amino acid derivatives using IR and THz spectroscopies and DFT calculations
| Project/Area Number |
21550011
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | University of Fukui |
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Principal Investigator |
MIZUNO Kazuko 福井大学, 大学院・工学研究科, シニアフェロー (10126641)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 弱い水素結合 / C-H…OH_2 / 分子間振動スペクトル |
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| Research Abstract |
We have found "strange water molecules" in aqueous solutions of organic compounds with a polar group like alcohols, amino acid derivatives, and proteins, where hydrogen bond donating strength of O-H groups is weakened, but the hydrogen bond accepting strength of the water oxygen is strengthened. We have demonstrated that strong co-operative hydrogen bonds are formed among HO-H…O and C-H…OH_2 hydrogen bonds, which leads to the formation of the strange water. We have identified the formation of the weak hydrogen bond C-H…OH_2 as the key role of the hydrophobic hydration of the solutes. We also observed inter-molelcular vibration spectra of C-H…O=C formed within aldehyde dimer and proved experimentally the presence of the weak hydrogen bonds.
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