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Highly ordered adlayers of three calix[4]arene derivatives on Au(1 1 1) surface in HClO4 solution: in situ STM study
Affiliation:1. Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;2. China Academy of Civil Aviation Science and Technology, Beijing 100028, China;1. Liaoning Key Materials Laboratory for Railway, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China;2. School of Mathematics and Informatics, Henan Polytechnic University, Jiaozuo City 454003, Henan Province, China;3. Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China;1. Cranfield Forensic Institute, Cranfield University, Defence Academy of the United Kingdom, Shrivenham SN6 8LA, United Kingdom;2. Center for Defence Chemistry, Cranfield University, Defence Academy of the United Kingdom, Shrivenham SN6 8LA, United Kingdom;1. Instituto Mexicano del Petróleo, Dirección de Investigación en Transformación de Hidrocarburos, Eje Central Lázaro Cárdenas 152, 07730 México D.F., Mexico;2. Institute of Physics and Mechatronics, University of Pannonia, PO Box 158, Veszprém H-8201, Hungary;3. Área de Física de Procesos Irreversibles, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana, Av. San Pablo 180 Col. Reynosa, 02200 México D.F., Mexico;1. Physics Department, University of the West Indies, P.O. Box 64, Bridgetown, Barbados;2. Centre for Advanced Microscopy (CFAM), University of Reading, Reading RG6 6AD, UK;3. Centro Empresarial da Marinha Grande Rua de Portugal-Zona Industrial, 2430-028 Marinha Grande, Portugal
Abstract:
Highly ordered adlayers of three calix[4]arene derivatives have been prepared on Au(1 1 1) surface in HClO4 solution. The adlayer structures are characterized by in situ scanning tunneling microscopy (STM). High-resolution STM images reveal the molecular orientation and packing arrangement in the ordered adlayers. All the molecules are upright on Au(1 1 1) surface in pinched cone conformation. The structural difference of these molecules is proposed to be from the different functional groups at the upper and lower positions. The structural models are tentatively proposed for three ordered adlayers.
Keywords:
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