Influence of specific intermolecular interactions on the self-assembly and phase behavior of oligo(ethylene glycol)-terminated alkanethiolates on gold
Influence of specific intermolecular interactions on the self-assembly and phase behavior of oligo(ethylene glycol)-terminated alkanethiolates on gold
复制标题
特定分子间相互作用对寡聚乙二醇封端的烷硫醇在金上的自组装和相行为的影响
DOI：
10.1021/jp004441g
复制
发表时间：
2001
影响因子：
3.3
通讯作者：
B. Liedberg
中科院分区：
文献类型：
--
作者：
R. Valiokas;S. Svedhem;M. Östblom;A. Svensson;B. Liedberg
A comparative study of the self-assembly and phase behavior of seven different oligo(ethylene glycol) (OEG)-terminated alkanethiols on polycrystalline gold surfaces is presented. The general structure of the compounds is HS(CH2)m-X-EGn, where m = 11, 15; n = 2, 4, 6, and the linkages X are amide (−CONH−), ester (−COO−), or ether (−O−) groups. The amide and ester groups give rise to the intermolecular hydrogen bonding and dipole−dipole interactions, respectively, whereas the ether lacks specific interactions. The results from contact angle goniometry, null ellipsometry, and infrared reflection−absorption spectroscopy (IRAS) indicate that the intermolecular interactions can be partly used to control the conformation and order of the OEG portion of the self-assembled monolayers (SAMs). It is shown that the lateral hydrogen bonding stabilizes the all-trans conformation of the EG4 tails in the SAMs. Further on, the mechanism behind the thermal phase behavior of the OEG SAMs is investigated using temperature-pr...
