Insight into the structural transformation of tetraphenylethylene acids at liquid–solid interface induced by linear aminofunctionalized triazine derivatives and annealing treatment  

作　　者：Ting Meng Xuan Peng Xunwen Xiao Ke Deng Yu-Wu Zhong Qingdao Zeng 

机构地区：[1]CAS Key Laboratory of Standardization and Measurement for Nanotechnology,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology(NCNST),Beijing 100190,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Science,Nanchang Institute of Technology,Nanchang 330099,China [4]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Photochemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [5]College of Materials and Chemical Engineering,Ningbo University of Technology,Ningbo 315211,China

出　　处：《Nano Research》2023年第12期13335-13342,共8页纳米研究（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22272039 and 21972031);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB36000000);the Jilin Chinese Academy of Sciences-Yanshen Technology Co.,Ltd.

摘　　要：The interaction between organic photoelectric molecules leads to the formation of a certain aggregation structure,which plays a pivotal role in the charge transport at the intermolecular interface.In view of this,we investigated the mechanism and law of intermolecular interaction by detecting the self-assembled behaviors between organic photoelectric molecules at the interface by scanning tunneling microscopy(STM).In this work,the structural transformations of tetraphenylethylene acids(H_(4)ETTCs)on graphite surface induced by temperature and triazine derivatives(zcy-19,zcy-27,and zcy-38 molecules)were studied by STM technology and density functional theory(DFT)calculations.At room temperature,zcy-19 and H_(4)ETTC molecules formed a small range of ordered co-assembled nanostructure,while for zcy-27 or zcy-38 molecules,no co-assembled nanostructures were observed and only their own self-assembled structures existed on graphite surface,individually.In the thermal annealing trials,the original co-assembled H_(4)ETTC/zcy-19 structure disappeared,and only zcy-19 and H_(4)ETTC self-assembled in separate domains.Nevertheless,new well-ordered H_(4)ETTC/zcy-27 or H_(4)ETTC/zcy-38 co-assembled structures appeared at different annealing temperatures,respectively.Combined with DFT calculations,we further analyzed the mechanism of such structural transformations by triazine derivatives and temperature.Results reveal that triazine derivatives could interact with H_(4)ETTC by N–H···O and O–H···N hydrogen bondings,and whether temperature or zcy series compounds could achieve successful regulation of H_(4)ETTC assembly behavior is closely associated with the conjugated skeleton length of zcy series compounds.

关 键 词：tetraphenylethylene acids triazine derivatives annealing treatment scanning tunneling microscopy(STM) 

分 类 号：O62[理学—有机化学]