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Construction of tunable supramolecular networks studied by scanning tunneling microscopy

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Science China Chemistry 2010年第2期53卷 310-317页

作者： zeng qingdao WANG Chen National Center for Nanoscience and Technology(NCNST) Beijing 100190China

In this review we describe a family of organic-based host frameworks which can accommodate guest molecules. The aim of the study is to test the adjustability of this class of mimic structures that may lead to new interesting functions. Emphasis of our research is placed upon four aspects: 1) thermal properties, 2) surface photochemistry, 3) fullerene adsorption, and 4) guest inclusion. It is envisioned that such approach of nanoporous molecular networks might be developed into a new family of useful soft frameworks for studies toward shape-selective catalysis, molecular recognition, self-assembly, and host-guest supramolecular chemistry.

关键词： molecular recognition self-assembly molecular template scanning tunneling microscopy(STM)

Two-dimensional (2D) Supramolecular Coordination at Liquid/ Solid Interfaces Studied by Scanning Tunneling Microscopy

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中国化学:英文版 2015年第1期33卷 53-58页

作者： Jing Xu qingdao zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology(NCNST)Beijing 100190China

In this review, supramolecular coordination processes on two-dimensional (2D) surfaces or interfaces observed by scanning tunneling microscopy (STM) are discussed. Four parts are mainly involved, which include (1) recognition of Fe^(3+) through functional molecular networks, (2) K^(+)-induced switching of valinomycin, (3) supramolecular coordination happened in a nano-reactor, (4) reversible 2D supramolecular spring driven by coordination. The direct insight of the coordination phenomena provided by STM supplements our knowledge of its mechanism. Since different building blocks can be connected into a whole part through coordination, the understanding of its mechanism will be beneficial to the future design of molecular devices.

关键词： metal-ligand coordination scanning tunneling microscopy(STM) self-assembly

Dependence of the surface-assisted fullerene-based complex structure on the template molecule design

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Nano Research 2019年第7期12卷 1509-1537页

作者： Yanfang Geng qingdao zeng Chen Wang CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

Fullerene derivatives as a kind of star carbon materials have received intense investigation because of their three-dimensional shape,anisotropic electron mobility,and high electron ***,the cutting-edge developments of fullerene nanomaterials have had a tremendous impact on a wide range of applications,such as organic solar cells,field effect transistors,and *** explore their full potential applications,research into fullerene-based multilevel nanostructures relying on hierarchical interactions from bottom to top is rapidly *** is of great theoretical and practical significance to prepare multilevel fullerene nanostructures with structural and properties controlled by optimizing the influencing *** review would offer several aspects including the chemical structures of organic molecules and the nanostructures of the organic molecules and fullerene-organic *** monolayers or multilayers,fullerene molecules tend to fall into a space of suitable size,in which the located positions are affected by the intermolecular *** the covered surfaces,fullerenes are more likely to approach the electron-withdrawing units through the donor-acceptor and charge transfer *** the implementation of this review,an exhaustive analysis on the chemical modification,including the molecular backbone and substituents,preformed network synergies,and adsorption sites is *** addition,the relationship between the molecules and structures that illustrates the importance of the molecular design for the controlled fullerenes hybrid nanostructures can be further understood based on the results of the joined experimental and computational investigations.

关键词： fullerene organic molecule nanostructure property molecular design

Host-guest supramolecular chemistry at solid-liquid interface:An important strategy for preparing two-dimensional functional nanostructures

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Science China Chemistry 2014年第1期57卷 13-25页

作者： ZHANG XueMei zeng qingdao WANG Chen National Center for Nanoscience and Technology (NCNST)

Supramolecular self-assembly,an important strategy in nanotechnology,has been widely studied in the past two *** this review,we have introduced the recent progress on construction of two-dimensional(2D)nanostructures by host-guest supramolecular chemistry at solid-liquid interface,and the interactions between the host assembly and the guest molecules are the major *** first,the hydrogen bonds connected hybrid structures are *** then we have paid a close attention on the surface-confined condensation reactions that has flourished recently in direct preparing novel nanostructures with increasing structural *** the end,the cavity confinement of the 2D supramolecular host-guest architectures has been *** the basis of the above-mentioned interactions,a group of functional hybrid structures have been ***,scanning tunneling microscopy(STM),a unique technique to probe the surface morphology and information at the single molecule level,has been used to probe the formed structures on highly oriented pyrolytic graphite(HOPG)surface.

关键词： self-assembly,STM,hydrogen bond,host-guest chemistry,supramocular coordination,Schiff-base reaction

Self-assembled supramolecular networks at interfaces: Molecular immobilization and recognition using nanoporous templates

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1739-1748页

作者： LI Min zeng qingdao WANG Chen National Center for Nanoscience and Technology (NCNST) Beijing 100190 China

In this review a series of organic-based open porous networks are discussed, in which hydrogen bonds play an important role in network formation. Using these open networks as molecular templates: 1) a wealth of functional guest species can be immo- bilized; 2) fullerene molecules can be separated and recognized; 3) photoisomerization reactions can be observed by STM; 4) 1D molecular arrays can be constructed; and 5) heterogeneous bilayer structures can be formed. It is envisioned that these su- pramolecular networks might be developed into a new family of useful soft frameworks for studies toward shape-selective ca- talysis, molecular recognition and host-guest supramolecular chemistry.

关键词： supramolecular networks molecular recognition scanning tunneling microscopy self-assembly

Advances in the study of the host-guest interaction by using coronene as the guest molecule

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Chinese Chemical Letters 2019年第2期30卷 292-298页

作者： Jianqiao Li Yuxin Qian Wubiao Duan qingdao zeng Department of Chemistry School of ScienceBeijing Jiaotong University CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology (NCNST)

Host-guest chemistry in two-dimensional (2D) networks has gained much interest for the new functionalities and potential applications, such as separation technology, photogenic crystals and biomimetic surfaces. Nanoporous supramolecular networks are assembled by a range of non-covalent forces like hydrogen bonds, van der Waals interactions and coordinate bonds, to immobilize guest molecules of different sizes and shapes. In this review, we mainly presented the effect of coronene on the host-guest architecture. Coronene (COR) is chosen to be the promising guest molecule and it can embed, cover, or change the host networks in different host-guest systems. All of the research in the review was finished with assistance of scanning tunneling microscope (STM). These studies were called upon impose controlling on host-guest systems and revealed the behaviors of COR clusters as guest molecules.

关键词： Host-guest chemistry Coronene Molecular template 2D self-assembly Scanning tunneling microscopy(STM)

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

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Nano Research 2023年第12期16卷 13335-13342页

作者： Ting Meng Xuan Peng Xunwen Xiao Ke Deng Yu-Wu Zhong qingdao zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Science Nanchang Institute of TechnologyNanchang 330099China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of PhotochemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211China

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 *** 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)*** 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,*** 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 ***,new well-ordered H_(4)ETTC/zcy-27 or H_(4)ETTC/zcy-38 co-assembled structures appeared at different annealing temperatures,*** with DFT calculations,we further analyzed the mechanism of such structural transformations by triazine derivatives and *** 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)

The self-assemblies of a newly designed star-shaped molecule end-capped with bromine atoms studied by scanning tunneling microscopy

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Chinese Chemical Letters 2020年第2期31卷 353-356页

作者： Jingfei Hou Bin Tu qingdao zeng Chuanlang Zhan Jiannian Yao Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of PhotochemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100080China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China University of Chinese Academy of Sciences Beijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100149China

A new star-shaped molecule StOF-Br_3 containing oligofluorenes and halogen atoms(Bromine) has been synthesized and studied by Scanning Tunneling Microscopy(STM) at the highly oriented pyrolytic graphite(HOPG) *** have obtained the high-resolution self-assembled STM images,from which the highly ordered and closely packed non-porous arrangements of the StOF-Br_3 molecular selfassemblies at the heptanoic acid/HOPG surface could be *** molecular models and selfassembled StOF-Br_3 architectures have been given in the following ***,we have also figured out the surface free energy by the density functional theory(DFT) calculation,which proved that the halogen...halogen interaction was strong enough to stabilize the ordered molecular *** work verifies the existence of bromine...bromine interactions,and meanwhile provides a kind of effective approach for quickly building ordered molecular nanoarchitectures with large areas and different geometries.

关键词： Molecular self-assemblies Star-shaped molecules Scanning tunneling microscopy(STM) Halogen...halogen interactions Bromine atoms

Structure of self-assembled monolayer of NPAN on Au(111) electrode

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Chinese Science Bulletin 2003年第18期48卷 1952-1955页

作者： YANG Guangzheng zeng qingdao WAN Lijun BAI Chunli Institute of Chemistry Chinese Academy of Sciences(CAS)Beijing 100080China Graduate School of CAS Beijing 100080China

Adsorption of 4-(4-nitrophenylazo)-1-naphthol (NPAN), an azobenzene derivative, on Au(111) has been in-vestigated in aqueous HClO4 solution by using the cyclic voltammetry and scanning tunneling microscopy (STM). The molecule is found to form a stable monolayer on the elec-trode with a (6×4) structure relative to the underlying Au(111) lattice. Cyclic voltammograms show that the redox reactions occurring on the electrode are retarded by the formation of the monolayer. A structural model is proposed for the two-dimensional adlayer.

关键词： Au(111) azobenzene self-assembled monolayer STM.