title: Study of the Edge-on Self-Assembly of Axially Substituted Silicon(IV) Phthalocyanine Derivatives in a Template on the HOPG Surface.
abstract: Molecular conformation is an important issue related to the self-assembly architecture and property. The self-assembly of silicon(IV) phthalocyanines covalently linked to the 5-N-cytidine or 4-carboxyphenoxy moiety at the axial positions, namely, SiPc(NC)2 and SiPc(CP)2, respectively, has been studied by means of scanning tunneling microscopy (STM) at the solid-liquid interface. The intermolecular axial hydrogen bonding in combination with the stabilizing role of the TCDB template brings about supramolecular self-assembled structures of silicon(IV) phthalocyanines in an edge-on orientation. Two pyridine compounds, 4,4'-bipyridine (BPY) and 1,2-di(4-pyridyl)ethylene (DPE), can tune the supramolecular structure, leading to interestingly axial self-assemblies of SiPc(CP)2 with BPY and DPE in an edge-on manner by hydrogen bonding. The results indicate that the axial substituents and the axial ligands can regulate and precisely control the conformation and arrangement of the phthalocyanine moiety on the graphite surface.
authors.affiliation: Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology (NCNST) , 11 Zhongguancun Beiyitiao, Beijing 100190, PR China.
authors.forename: Yanfang
authors.initials: Y
authors.lastname: Geng
authors.affiliation: Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology (NCNST) , 11 Zhongguancun Beiyitiao, Beijing 100190, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.affiliation: Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology (NCNST) , 11 Zhongguancun Beiyitiao, Beijing 100190, PR China.
authors.forename: Jindong
authors.initials: J
authors.lastname: Xue
authors.affiliation: College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University , Fuzhou 350108, PR China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Shen
authors.affiliation: CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, PR China.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.affiliation: College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University , Fuzhou 350108, PR China.
authors.forename: Jiandong
authors.initials: J
authors.lastname: Huang
authors.affiliation: Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University , Ganzhou, Jiangxi 341000, PR China.
authors.forename: Xiaokang
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology (NCNST) , 11 Zhongguancun Beiyitiao, Beijing 100190, PR China.
authors.forename: Qingdao
authors.initials: Q
authors.lastname: Zeng
mesh_terms: D002244:Carbon / Q000737:chemistry*; D005030:Ethylenes / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D008958:Models, Molecular; D008968:Molecular Conformation; D011725:Pyridines / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D005030:Ethylenes; D007211:Indoles; D054833:Isoindoles; D011725:Pyridines; C009139:pyrolytic carbon; D002244:Carbon; D006108:Graphite; C036216:ethylene; C013647:phthalocyanine; C034306:4,4'-bipyridyl; D012825:Silicon