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Enrichment of Large-Diameter Single-Walled Carbon Nanotubes (SWNTs) with Metallo-Octaethylporphyrins
Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka 1000, Bangladesh
Department of Chemistry, Shiga University of Medical Science, Seta, Otsu 520-2192, Japan
* Author to whom correspondence should be addressed.
Received: 25 March 2013; in revised form: 2 July 2013 / Accepted: 16 July 2013 / Published: 24 July 2013
Abstract: We report here a detailed experimental investigation on noncovalent functionalization of single-walled carbon nanotubes (SWNTs) with four different metallo-octaethylporphyrins (MOEPs). It has been found that the identity of the center metal of MOEP strongly influences the solubilization of SWNTs. MnOEPs and ZnOEPs successfully extracted SWNTs in methanol, as confirmed by absorption spectroscopy, while CoOEPs and CuOEPs were not able to extract SWNTs at all. Atomic force microscopy (AFM) studies revealed that large SWNTs bundles could be exfoliated into either individual SWNTs or very small bundles by complexation with ZnOEP molecules. As for enrichment of SWNTs, ZnOEPs and MnOEPs show similar diameter discrimination ability toward 76-CoMoCAT, providing the extracted SWNTs with relatively large diameters.
Keywords: single-walled carbon nanotubes; metallo-octaethylporphyrins; complexation; enrichment
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MDPI and ACS Style
Li, Y.; Rahman, A.F.M.M.; Liu, G.; Xiong, Z.; Koezuka, K.; Xu, Z.; Komatsu, N.; Wang, F. Enrichment of Large-Diameter Single-Walled Carbon Nanotubes (SWNTs) with Metallo-Octaethylporphyrins. Materials 2013, 6, 3064-3078.
Li Y, Rahman AFMM, Liu G, Xiong Z, Koezuka K, Xu Z, Komatsu N, Wang F. Enrichment of Large-Diameter Single-Walled Carbon Nanotubes (SWNTs) with Metallo-Octaethylporphyrins. Materials. 2013; 6(8):3064-3078.
Li, Yuda; Rahman, A. F.M.M.; Liu, Gang; Xiong, Zichao; Koezuka, Kenji; Xu, Zhigao; Komatsu, Naoki; Wang, Feng. 2013. "Enrichment of Large-Diameter Single-Walled Carbon Nanotubes (SWNTs) with Metallo-Octaethylporphyrins." Materials 6, no. 8: 3064-3078.