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题名: Temperature-Triggered Chiral Self-Assembly of Achiral Molecules at the Liquid-Solid Interface
作者: Cheng, Linxiu1, 3; Li, Yibao3; Zhang, Chun-Yu2; Gong, Zhong-Liang2; Fang, Qiaojun1; Zhong, Yu-Wu2; Tu, Bin1; Zeng, Qingdao1; Wang, Chen1
关键词: chiral self-assembly ; temperature-triggered ; scanning tunneling microscopy ; flower-like structure ; achiral molecules
刊名: ACS Applied Materials & Interfaces
发表日期: 2016-11-23
卷: 8, 期:46, 页:32004-32010
收录类别: SCI
英文摘要: Temperature triggered chiral nanostructures have been investigated on two-dimensional (2D) surfaces by means of scanning tunneling microscopy. Achiral molecules 1 and 2 tend to self-assemble into strip structures on graphite before heating. However, R and S flower-like structures are observed when heated to certain temperature. The transition temperatures of 1 and 2 systems are 55 and 60 degrees C, respectively. The density functional theory calculations demonstrate that R and S flower-like structures are more stable than strip structures. The coexistence of flower-like structures and strip structures demonstrates the thermodynamic equilibrium. Further, when chiral solvent is added to the sample with other conditions remaining the same, the racemic phenomenon disappears and homochirality emerges. This is an efficient method to control the chirality of 2D molecular assemblies.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/36435
Appears in Collections:光化学实验室_期刊论文

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作者单位: 1.Natl Ctr Nanosci & Technol NCNST, CAS Ctr Excellence Nanosci, CAS Key Lab Standardizat & Measurement Nanotechno, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, CAS Key Lab Photochem, Beijing 100190, Peoples R China
3.Gannan Normal Univ, Key Lab Organopharmaceut Chem, Ganzhou 341000, Peoples R China
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