[2-(1-pyrenyl)ethyl]silyl silica packing material for liquid chromatographic separation of fullerenes

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Journal of Organic Chemistry; (United States)

DOI:https://doi.org/10.1021/jo00053a057· OSTI ID:6306046

Kimata, Kazuhiro; Hosoya, Ken; Araki, Takeo; Tanaka, Nobuo ^[1]

---

1. Kyoto Inst. of Technology (Japan)

As the interest in the fullerenes increases, better purification methods are being sought for C[sub 60], C[sub 70], and related compounds existing in crude soot. Two major problems encountered in the preparative separation of carbon clusters by HPLC, poor peak shape and limited loading capacity, are due to the facts that the fullerenes show limited solubilities in the solvents employed and that the retention provided by the stationary phases was also limited. The silica gel bonded with nitro aromatic groups possessing [pi]-acidity showed the improved separation and the greater loading capacity than alkyl-bonded silica stationary phases, especially at high temperatures. Stationary phases containing phenyl and naphthyl groups also showed increased retention. The amount of fullerenes that can be separated under these conditions, however, was still much smaller than that of ordinary substances. Here the authors report that the PYE silica, having [pi]-basic character, can provide much greater loading capacity and higher efficiency in an aromatic solvent such as benzene or toluene, permitting much easier preparative separations of carbon clusters than the reported methods. 13 refs., 3 figs., 1 tab.

• OSTI ID: 6306046
• Journal Information: Journal of Organic Chemistry; (United States), Journal Name: Journal of Organic Chemistry; (United States) Vol. 58:1; ISSN 0022-3263; ISSN JOCEAH
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ADSORBENTS
ALKYLATED AROMATICS
AROMATICS
BENZENE
CAPACITY
CARBON
CHROMATOGRAPHY
EFFICIENCY
ELEMENTS
FULLERENES
HYDROCARBONS
LIQUID COLUMN CHROMATOGRAPHY
LOADING
MATERIALS HANDLING
NONMETALS
ORGANIC COMPOUNDS
PURIFICATION
RETENTION
SEPARATION PROCESSES
SILICA GEL
SOLVENTS
SOOT
TOLUENE