Stabilization variation of organic conductor surfaces induced by π-π stacking interactions

The structures and stabilization of three crystal surfaces of TCNQ-based charge transfer complexes（CTCs） including PrQ（TCNQ） 2,MPM（TCNQ） 2,and MEM（TCNQ） 2,have been investigated by scanning tunneling microscopy（STM）.The three bulk-truncated surfaces are all ac-surface,which are terminated with TCNQ...

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Published inChinese physics B Vol. 21; no. 5; pp. 479 - 486
Main Author 窦瑞芬 林峰 刘富伟 孙祎 杨继勇 林炳发 何林 熊昌民 聂家财
Format Journal Article
LanguageEnglish
Published 01.05.2012
Subjects
TCNQ
不稳定
分子阵列
堆积作用
导体表面
扫描隧道显微镜
晶体表面结构
电荷转移络合物
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Summary:The structures and stabilization of three crystal surfaces of TCNQ-based charge transfer complexes（CTCs） including PrQ（TCNQ） 2,MPM（TCNQ） 2,and MEM（TCNQ） 2,have been investigated by scanning tunneling microscopy（STM）.The three bulk-truncated surfaces are all ac-surface,which are terminated with TCNQ molecular arrays.On the ac-surface of PrQ（TCNQ） 2,the TCNQ molecules form a tetramer structure with a wavelike row behavior and a 纬 angle of about 18掳 between adjacent molecules.Moreover,the dimer structures are resolved on both ac-surfaces of MPM（TCNQ） 2 and MEM（TCNQ） 2.In addition,the tetramer structure is the most stable structure,while the dimer structures are unstable and easily subject to the STM tip disturbance,which results in changeable unit cells.The main reasons for the surface stabilization variation among the three ac-surfaces are provided by using the ＇蟺-atom model＇.
Bibliography:Dou Rui-Fen ,Lin Feng ,Liu Fu-Wei ,Sun Yi ,Yang Ji-Yong,Lin Bing-Fa ,He Lin ,Xiong Chang-Min ,and Nie Jia-Cai a） Department of Physics,Beijing Normal University,Beijing 100875,China b） School of Physics,State Key Laboratory for Mesoscopic Physics,Peking University,Beijing 100871,China
The structures and stabilization of three crystal surfaces of TCNQ-based charge transfer complexes（CTCs） including PrQ（TCNQ） 2,MPM（TCNQ） 2,and MEM（TCNQ） 2,have been investigated by scanning tunneling microscopy（STM）.The three bulk-truncated surfaces are all ac-surface,which are terminated with TCNQ molecular arrays.On the ac-surface of PrQ（TCNQ） 2,the TCNQ molecules form a tetramer structure with a wavelike row behavior and a 纬 angle of about 18掳 between adjacent molecules.Moreover,the dimer structures are resolved on both ac-surfaces of MPM（TCNQ） 2 and MEM（TCNQ） 2.In addition,the tetramer structure is the most stable structure,while the dimer structures are unstable and easily subject to the STM tip disturbance,which results in changeable unit cells.The main reasons for the surface stabilization variation among the three ac-surfaces are provided by using the ＇蟺-atom model＇.
11-5639/O4
charge transfer complex （CTC）, scanning tunneling microscopy （STM）, π-π stackinginteraction, stabilization
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/21/5/056801