Chiral polymorphism:: A scanning tunneling microscopy study

被引:19
作者
De Feyter, S
Gesquière, A
De Schryver, F
Meiners, C
Sieffert, M
Müllen, K
机构
[1] Katholieke Univ Leuven, B-3001 Heverlee, Belgium
[2] Max Planck Inst Polymer Res, D-55021 Mainz, Germany
关键词
D O I
10.1021/la000693x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Physisorbed monolayer films of a chiral terephthalic acid derivative have been imaged on highly oriented pyrolytic graphite (HOPG) at the solution-substrate interface using scanning tunneling microscopy. The molecule comprises a nonchiral aromatic moiety and a chiral handle. It is found to form several two-dimensional polymorphs. The packing arrangement of the molecule is primarily directed by the aromatic part, whereas the chiral part may assume different conformations on the graphite surface. The high-resolution data confirm that for all polymorphs molecular chirality is transferred to the two-dimensional adlayer structure in an enantiospecific way, This enantiospecificity is attributed to adsorbate-substrate interactions.
引用
收藏
页码:9887 / 9894
页数:8
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