Laser desorption/ionization mass spectrometric analysis of surfactants on functionalized carbon nanotubes
Article first published online: 12 DEC 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Rapid Communications in Mass Spectrometry
Volume 27, Issue 1, pages 258–264, 15 January 2013
How to Cite
Cegłowski, M. and Schroeder, G. (2013), Laser desorption/ionization mass spectrometric analysis of surfactants on functionalized carbon nanotubes. Rapid Commun. Mass Spectrom., 27: 258–264. doi: 10.1002/rcm.6448
- Issue published online: 21 NOV 2012
- Article first published online: 12 DEC 2012
- Manuscript Accepted: 21 OCT 2012
- Manuscript Revised: 19 OCT 2012
- Manuscript Received: 1 AUG 2012
- Polish Ministry of Science and Higher Education. Grant Number: N 204 028636
Recently, unmodified and carboxylated carbon nanotubes have been used as assisting surfaces laser desorption/ionization (LDI) in mass spectrometry. The functionalization of carbon nanotubes with organic compounds should lead to a gamut of other promising LDI-assisting surfaces.
Carboxylated carbon nanotubes were functionalized with sinapinic acid either covalently or by creating an ionic macro-complex. Polyether-based surfactants were used as analytes to examine the properties of these new matrices. Mass spectrometric analysis was conducted on a LDI-quadrupole time-of-flight (QTOF) mass spectrometer. Carbon nanotube surfaces were deposited from suspension using the dried-droplet method.
The functionalization of the carbon nanotubes was confirmed with Fourier transform infrared (FTIR) spectroscopy. The usefulness of each material was examined with two poly(ethylene glycol) hexadecyl ether amphiphiles (Brij® 52 and Brij® 56) and a poly(ethylene glycol) monomethyl ether as analytes. Generally, the mass spectra obtained with carbon nanotubes covalently functionalized with sinapinic acid as a matrix had peaks with higher intensities than those obtained with carbon nanotubes functionalized by ionic macro-complex formation.
The presented new materials based on functionalized carbon nanotubes are effective in the LDI mass analysis of polyether amphiphiles and poly(ethylene glycol) monomethyl ether. This type of assisting surfaces can be highly modified by appropriate functionalization procedures. Copyright © 2012 John Wiley & Sons, Ltd.