Selective polycarboxylation of semiconducting single-walled carbon nanotubes by reductive sidewall functionalization.
| Autor: | Gebhardt B; Department of Chemistry and Pharmacy & Institute of Advanced Materials and Processes (ZMP), University of Erlangen-Nuremberg, Henkestrasse 42, 91054 Erlangen, Germany., Hof F, Backes C, Müller M, Plocke T, Maultzsch J, Thomsen C, Hauke F, Hirsch A |
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| Jazyk: | angličtina |
| Zdroj: | Journal of the American Chemical Society [J Am Chem Soc] 2011 Dec 07; Vol. 133 (48), pp. 19459-73. Date of Electronic Publication: 2011 Nov 10. |
| DOI: | 10.1021/ja206818n |
| Abstrakt: | The efficient and controllable synthesis, the detailed characterization, and the chemical postfunctionalization of polycarboxylated single-walled carbon nanotubes SWCNT(COOH)(n) are reported. This innovative covalent sidewall functionalization method is characterized by (a) the preservation of the integrity of the entire σ-framework of SWCNTs; (b) the possibility of achieving very high degrees of addition; (c) control of the functionalization degrees by the variation of the reaction conditions (reaction time, ultrasonic treatment, pressure); (d) the identification of conditions for the selective functionalization of semiconducting carbon nanotubes, leaving unfunctionalized metallic tubes behind; (e) the proof that the introduced carboxylic acid functionalities can serve as versatile anchor points for the coupling to functional molecules; and (f) the application of a subsequent thermal degradation step of the functionalized semiconducting tubes leaving behind intact metallic SWCNTs. Functional derivatives have been characterized in detail by means of Raman, UV-vis/nIR, IR, and fluorescence spectroscopy as well as by thermogravimetric analysis combined with mass spectrometry, atomic force microscopy, and zeta-potential measurements. (© 2011 American Chemical Society) |
| Databáze: | MEDLINE |
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