| 학회 |
한국고분자학회 |
| 학술대회 |
2013년 봄 (04/11 ~ 04/12, 대전컨벤션센터) |
| 권호 |
38권 1호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Probing nanomechanics of cation-π interactions in aqueous solution |
| 초록 |
(Angewandte chemie accepted) The nature of cation-pi interactions in aqueous medium were studied by use of a SFA in a simplified experimental system: one surface is coated with positive-charged homo-peptide (PLL) as cations, and the other surface is coated with three kinds of aromatic homo-polymers (poly-L-tryp, poly-L-tyr, PS as pi systems. The adhesion between two surfaces are dependent on types of competing cation (NR4+, K+, Li+, Na+), contact time, competing cation concentration, pH variations (3.0-6.8), and types of aromatic side groups (indole, phenol, benzene). The adhesion to PLL in terms of strength follows the order of PTrp＞ PS ＞PTyr and the adhesion to PTrp surface follows the order of NR4+ ＞ K+ = NH3R+ ＞ Li+, Na+, qualitatively consistent with previous theoretical studies. The results directly proved the theory of cation-pi interactions in aqueous system and verified the hypotheses to explain the physiological phenomena. |
| 저자 |
오동엽1, Qingye Lu2, 황동수3, Hongbo Zeng4, 이용진5, 조용석6
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| 소속 |
1해양대, 2포스텍, 3Department of Chemical and Materials Engineering, 4Univ. of Alberta, 5Edmonton, 6AB |
| 키워드 |
cation-pi interaction; potassium channel; noncovalent interaction; surface forces apparatus (SFA)
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| E-Mail |
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