Jump to main content
Jump to site search

Issue 27, 2016
Previous Article Next Article

Carbon nanotubes dispersed in aqueous solution by ruthenium(II) polypyridyl complexes

Author affiliations

Abstract

Cationic ruthenium(II) polypyridyl complexes with appended pyrene groups have been synthesized and used to disperse single-walled carbon nanotubes (SWCNT) in aqueous solutions. To this end, planar pyrene groups enable association by means of π-stacking onto carbon nanotubes and, in turn, the attachment of the cationic ruthenium complexes. Importantly, the ionic nature of the ruthenium complexes allows the formation of stable dispersions featuring individualized SWCNTs in water as confirmed in a number of spectroscopic and microscopic assays. In addition, steady-state photoluminescence spectroscopy was used to probe the excited state interactions between the ruthenium complexes and SWCNTs. These studies show that the photoluminescence of both, that is, of the ruthenium complexes and of SWCNTs, are quenched when they interact with each other. Pump-probe transient absorption experiments were performed to shed light onto the nature of the photoluminescence quenching, showing carbon nanotube-based bands with picosecond lifetimes, but no new bands which could be unambigously assigned to photoinduced charge transfer process. Thus, from the spectroscopic data, we conclude that quenching of the photoluminescence of the ruthenium complexes is due to energy transfer to proximal SWCNTs.

Graphical abstract: Carbon nanotubes dispersed in aqueous solution by ruthenium(ii) polypyridyl complexes

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Mar 2016, accepted on 29 May 2016 and first published on 29 Jun 2016


Article type: Paper
DOI: 10.1039/C6NR02577C
Citation: Nanoscale, 2016,8, 13488-13497
  •   Request permissions

    Carbon nanotubes dispersed in aqueous solution by ruthenium(II) polypyridyl complexes

    K. Huang, A. Saha, K. Dirian, C. Jiang, P. E. Chu, J. M. Tour, D. M. Guldi and A. A. Martí, Nanoscale, 2016, 8, 13488
    DOI: 10.1039/C6NR02577C

Search articles by author

Spotlight

Advertisements