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：

LANGMUIR | 2011年 / 27卷 / 18期

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.

引用

页码：11508 / 11513

页数：6

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