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|
| Type |
Poster Presentation |
| Area |
Organic Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
ORGN.P-430 |
| Subject |
Shape-Persistent Macrocycles from Foldable Open-Chains: Design, Synthesis, and Stimulated 2-D Ordering at Liquid-Solid Interfaces |
| Authors |
Soobin Kim, Dongwhan Lee*
Division of Chemistry, Seoul National University, Korea
|
| Abstract |
Molecular self-assembly at surfaces offers an efficient route to construct well-ordered 2-D nanostructures. Using crescent-shaped bis(triazolo)benzene as a key structural component, we have designed and prepared π-conjugated open-chain molecules. A last-stage C-C cross-coupling of these zig-zag shaped precursors cleanly produced shape-persistent macrocycles. Scanning tunneling microscopy (STM) analysis on these molecules revealed the formation of highly-ordered 2-D structures at liquid-solid interfaces. Depending on the conformational flexibility of the molecular backbone and the chemical structure of the peripheral groups, different types of 2-D lattices were observed. Intriguingly, we found that perturbation by the STM tip or the addition of co-solutes profoundly impacted the kinetics of self-assembly and surface patterning. These results highlight the importance of non-covalent interactions in the synthesis and assembly of shape-adaptive vs shape-persistent molecules. |
| E-mail |
sjf405@snu.ac.kr |
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121st General Meeting of the KCS