標題: | On-Surface Evolution of meso-Isomerism in Two-Dimensional Supramolecular Assemblies |
作者: | Park, Juyeon Kim, Ju-Hyung Bak, Sunmi Tahara, Kazukuni Jung, Jaehoon Kawai, Maki Tobe, Yoshito Kim, Yousoo 應用化學系 Department of Applied Chemistry |
關鍵字: | chirality;nanostructures;scanning tunneling microscopy;self-assembly;surface chemistry |
公開日期: | 8-七月-2019 |
摘要: | Chiral structures created through the adsorption of molecules onto achiral surfaces play pivotal roles in many fields of science and engineering. Here, we present a systematic study of a novel chiral phenomenon on a surface in terms of organizational chirality, that is, meso-isomerism, through coverage-driven hierarchical polymorphic transitions of supramolecular assemblies of highly symmetric pi-conjugated molecules. Four coverage-dependent phases of dehydrobenzo[12]annulene were uniformly fabricated on Ag(111), exhibiting unique chiral characteristics from the single-molecule level to two-dimensional supramolecular assemblies. All coverage-driven phase transitions stem from adsorption-induced pseudo-diastereomerism, and our observation of a lemniscate-type (infinity) supramolecular configuration clearly reveals a drastic chiral phase transition from an enantiomeric chiral domain to a meso-isomeric achiral domain. These findings provide new insights into controlling two-dimensional chiral architectures on surfaces. |
URI: | http://dx.doi.org/10.1002/anie.201904290 http://hdl.handle.net/11536/152618 |
ISSN: | 1433-7851 |
DOI: | 10.1002/anie.201904290 |
期刊: | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION |
Volume: | 58 |
Issue: | 28 |
起始頁: | 9611 |
結束頁: | 9618 |
顯示於類別: | 期刊論文 |