Abstract
Anthracene based nano/microstructures of different sizes and shapes like tubes/fibers are synthesized using a simple open air chemical vapor deposition technique. Thermal solid phase reaction between anthracene 9-carboxylic acid and calcium oxide reported recently [H. Liu et al., J. Am. Chem. Soc.125, 10794 (2003)] is used to obtain organic molecular nanostructures. The products of temperature (320 °C) induced reaction get deposited on the substrates placed inside the reaction chamber as well as on the inner walls in different nano/micrometer forms, tubes/rods/fibers and having different sizes. Structural characterization of the reaction products is performed using optical microscopy, field emission electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Chemical composition studies are conducted using infrared (IR), nuclear magnetic resonance (NMR), and gas chromatography (GC)-Mass spectroscopy, as well as elemental analysis. IR studies of the nanostructures obtained on the substrate using IR spectroscopy reveal the presence of C=O groups, the confirmatory evidence of which is obtained using energy dispersive x-ray spectroscopic (EDS) analysis. Interaction study of the C=O groups with ammonia vapor is conducted and resulting changes are monitored using Fourier transform infrared (FTIR). A strong covalent modification of anthracene based structures by exposure to ammonia molecules is indicated.
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Acknowledgments
The research has been conducted under a scheme sponsored by Council of Scientific and Industrial Research, New Delhi (Scheme No. 80(0047)/03/EMR-II). We are grateful to Director, National Physical Laboratory and Principal, Dyal Singh College for providing the facilities and for their constant encouragement. The authors thank Dr. Ram Kishore and Mr. Sukhvir Singh for TEM analysis. The authors also thank All India Institute of Medical Sciences for EDX facility, Indian Institute of Technology, Delhi for NMR facility and Sriram Institute for Industrial Research, Delhi for GC-Mass facility.
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Gupta, A., Goel, S., Mehrotra, R. et al. Fabrication, characterization and chemical modification of anthracene based nanostructures. Journal of Materials Research 22, 2719–2726 (2007). https://doi.org/10.1557/JMR.2007.0369
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DOI: https://doi.org/10.1557/JMR.2007.0369