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Recognition Properties of Cucurbit[7]uril Self-Assembled Monolayers Studied with Force Spectroscopy
被引:37
作者:
Gomez-Casado, Alberto
[1
]
Jonkheijm, Pascal
[1
]
Huskens, Jurriaan
[1
]
机构:
[1] Univ Twente, Mol Nanofabricat Grp, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
来源:
关键词:
ORGANIC-MOLECULES;
METAL-ION;
HOST;
CUCURBITURIL;
CALIBRATION;
INCLUSION;
ADHESION;
COMPLEX;
BINDING;
D O I:
10.1021/la202346r
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Specific (host guest) and unspecific (substrate guest) interactions, between self-assembled monolayers of cucurbit[7]uril (CB[7]) on gold, (Au) substrates and neutral adamantyl (Ad) guests were resolved by studying these, interactions at the single molecule level using dynamic force spectroscopy. The dissociation rate constants of the Ad-Au and the Ad-CB[7] interactions were 0.3 s(-1) and 0.03 s(-1), respectively, indicating that the specific binding is more stable. The probability of observing a specific interaction (40 +/- 9%) is similar to the reported surface coverages of CB[7] monolayers on Au substrates. The higher strength and stability of the Ad-CB[7] interactions explains why, although presenting an imperfect coverage, CB[n] monolayers can be used successfully as a platform for surface immobilization.
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页码:11508 / 11513
页数:6
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