Adsorbent silica with bonded fullerenes

In normal-phase liquid chromatography on silica and alumina the hydrogen bonding of fullerenes with surface hydroxyl groups of adsorbent is the most important. On separation of Ceo and C70 on a column packed by alumina Alusorb N 200 from n hexane the selectivity is 1.80 (Fig. 2 a.). The reversed-phase adsorbents such as silica with bonded diphenylsilyl... 

The fullerene containing silica adsorbent can be prepared by use the reaction of fullerenes with bonded to silica surface amino groups. 

Silica gel with bonded aminopropyl groups (concentration of aminogroups is 0.8 mmol/g) with specific surface area s = 180 m /g and Silasorb Amin (CzR) with s = 200 m /g as initial adsorbents and fullerene Ceo (more than 99% purity) were used for the modification of silica surface. 

The surface of fullerene molecules itself in porous fullerene - containing aerogel probably are screened for the interaction with other organic molecules owing to the bonding of possible 14 aminocompounds with fullerene molecules during the reaction of polycondensation [19]. So to prepare fullerene containing adsorbent with opened for interaction of fullerene molecules with other compounds it is better to modify silica surface by 3-aminopropyltrietoxysilane and then to modify this adsorbent by fullerene molecules. In this case fullerene molecules can be attached to the surface only from one side of molecule and after reaction of modification the pore surface will be covered by fullerene molecules. The pore diameter and specific surface area of prepared adsorbent will be determined... 

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