Abstract
Pyrene-based nanotweezers 1 consisting of two pyrenes and amino-substituted carbazole in between have been successfully synthesized via Suzuki–Miyaura coupling reaction. The supramolecular complex formation of nanotweezers 1 with single-walled carbon nanotubes (SWNTs) was studied, and it was found that nanotweezers 1 exhibited much higher the SWNTs extraction ability as compared to the analogous dipyrene nanotweezers 2 and 3 with soluble alkyl-substituents. This enhanced extraction ability of 1 can be attributed to the formation of more stable SWNT complexes in methanol. On the basis of photoluminescence excitation and UV–Vis-NIR absorption of 76-CoMoCAT SWNTs before and after the extraction, nanotweezers 1 were found to show high selectivity towards (8,4)-, (7,6)-, (9,4)-, and (8,6)-SWNTs with diameter ranging from 0.84 to 0.97 nm.







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Acknowledgements
Dr. Feng Wang wishes to thank Prof. Naoki Komatsu at Shiga University of Medical Science for the long-time support and encouragement. This work was financially supported by Natural Science Foundation of China (Grant No. 51103111), Education Ministry of China (Program for NCET-12-0714), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, the Open Fund of the State Key Laboratory of Luminescent Materials and Devices (2014-skllmd-11), and Graduate Innovative Fund of Wuhan Institute of Technology (Grant No. CX2013009).
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Li, Y., Wang, X., Cheng, C. et al. Enhanced solubilization of large-diameter single-walled carbon nanotubes with amino-functionalized dipyrene nanotweezers. J Mater Sci 50, 6032–6040 (2015). https://doi.org/10.1007/s10853-015-9150-6
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DOI: https://doi.org/10.1007/s10853-015-9150-6


