Liquid chromatography/mass spectrometry investigation of the reversed-phase separation of fullerenes and their derivatives

Journal Article · Wed Sep 01 04:00:00 EDT 1993 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00065a012· OSTI ID:5717561

Anacleto, J F ^[1]; Quilliam, M A ^[2]

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1. Dalhousie Univ., Halifax, Nova Scotia (Canada)
2. National Research Council, Halifax, Nova Scotia (Canada)

The separation of fullerenes and their derivatives on four commercially available reversed-phase columns was investigated using liquid chromatography/mass spectrometry with atmospheric pressure chemical ionization. Three octadecylsilica stationary phases were incapable of adequately separating the fullerenes according to the number of carbons. However, baseline resolution of nearly all the fullerenes (up to at least C[sub 96]) was achieved with a 2-(1-pyrenyl)ethylsilica phase. The resolution of individual fullerene isomers, on the other hand, was best accomplished with a polymeric octadecylsilica bonded phase. A proposed mechanism for this unique ability combines the shape selectivity of polymeric phases, previously recognized for planar polycyclic aromatic hydrocarbons, and the different molecular footprints of the isomers. This retention mechanism can also be used to explain the increasingly lower retention times of successively substituted fullerenes; groups bonded to the fullerene surface appear to disrupt adsorptive interactions between the fullerene molecular footprints and the stationary phases. 44 refs., 8 figs.

• OSTI ID: 5717561
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 65:17; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400201 -- Chemical & Physicochemical Properties
CARBON
CHROMATOGRAPHY
ELEMENTS
FULLERENES
IONIZATION
ISOMERS
LIQUID COLUMN CHROMATOGRAPHY
MASS SPECTROSCOPY
NONMETALS
SEPARATION PROCESSES
SOOT
SPECTROSCOPY