Observation by atomic force microscopy of calix[n]arene thin films and their thermal rearrangement |
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| Affiliation: | 1. ROMB, Laboratoire de Chimie Industrielle, Université de Claude Bernard Lyon I, 43 Bvd du 11 Novembre 1918, Villeurbanne cedex, F69622, France;2. IBCP, CNRS UPR 412, 7 passage du Vercors, Lyon cedex 07, F69367, France;1. Department of Mechanical Engineering, Masdar Institute, Khalifa University of Science and Technology, Masdar City, PO Box 127788, Abu Dhabi, United Arab Emirates;2. Mechanical Engineering Program, University of Michigan-Flint, Flint, MI 48502, USA;1. Department of Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran;2. National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran;1. Institute of Analytical Chemistry, Academy of Sciences of the Czech Republic, Veveří 97, 60200 Brno, Czech Republic;2. University of Defence, Kounicova 65, 66210 Brno, Czech Republic;1. Shanxi Province Key Laboratory of Functional Nanocomposites, School of Materials Science and Engineering, North University of China, Taiyuan 030051, China,;2. The Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, TX 76019, USA |
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| Abstract: | Vapor deposited thin films of various calix[n]arenes have been investigated by contact mode atomic force microscopy. Two classes of thin films have been defined. For para-H-calix-4-arene, para-H-calix-6-arene, and para-iso-propyl-calix-4-arene pre-organized structures are observed on deposition. For para-iso-propyl-calix-6-arene, para-tert-butyl-calix-4-arene, para-tert-butyl-calix-6-arene, para-tert-butyl-calix-8-arene glassy unordered systems are obtained on deposition. Annealing of para-iso-propyl-calix-6-arene, para-tert-butyl-calix-4-arene, para-tert-butyl-calix-6-arene at 100°C leads to crystallization either directly from the glass or by migration of nano-crystallites to form microstructures. |
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