The dispersion effect of five cyclodextrins (CDs) on carbon nanotubes (CNTs) was studied. 2-HB-b-CD is the most efficient dispersing agent. The dispersing ability of CDs on the dispersion of CNTs was 2-The movement in the FTIR spectra of the asymmetric and symmetric stretching vibrations of O-H of the composites means hydrogen bonding was an important factor on the dispersing ability. These results indicate that the type of interaction might be a combination of a weak interaction similar to a van der Waals type and hydrogen bonding mechanism.
Compared with p-Cyclodextrin(P-CD), 2 -0 -[ (~) -2 -hydroxypropyl] -p-CD ( A ) is more sensitive for chiral recognition. When (A> was used as the chiral mobile phase additive, some 2041 2042 H A 0 ET AL.racemic amino acids were directly separated on silica gel TLC for the first time.
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