| Project/Area Number |
61550661
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子物性
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| Research Institution | Research Laboratory of Resources Utilization, Tokyo Institute of Technology (1987)
Kyoto University (1986) |
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Principal Investigator |
SISIDO Masahiko Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 資源化学研究所, 助教授 (60026268)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1987: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1986: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Polypeptides / Peptides / Nonlinear Optics / 二倍波発生 / 非線型光学 / レーザー / ヘリックス |
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| Research Abstract |
Amino acids, their derivatives, linear dipeptides, cyclic dipeptides, linear tripeptides, and polypeptides carrying highly polarizable aromatic groups were prepared. In particular, those carrying mono- and di-nitrophenyl groups at the side chain and/or at the termini were synthesized. The second harmonic generation (SHG) efficiency of the peptides and polypeptides were tested under irradiation of a pulsed laser light (1064 <micrn>m). Among the 91 different compounds, L-Valine-P-nitroanilide (Val-NA) showed the highest SHG efficiency [9.2-xI^<2<omega>>(urea)]. Val-NA was transparent down to 420 nm and phase-matchable to the second harmonic light, indicating that Val-NA is a potential SHG substance which converts the semiconductor laser light.
Cholesteric liquid crystals carrying highly polarizable aromatic groups were also prepared. The orientation of the polarizable groups in the liquid crystalline phase was determined by spectroscopic methods. The SHG efficiency of those liquid crystalline substances were tested. But no SHG was detected.
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