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