Poly-SULL

The helical polytriphenylmethyl methacrylate was the first synthetic chiral polymer able to separate a very limited number of enantiomers [28]. Recently a fully synthetic chiral stationary phase based on polymerized diacryloyl derivative of fra s-l,2-diaminocyclohexane [either (R, R) or (S, S)] bonded to silica gel in the form of a very thin layer was proposed as a new LC CSP [29]. This CSP could not resolve many enantiomeric pairs. However, when it could resolve a racemate, it was shown that the amount that could be loaded was much larger than that on most other CSPs. It means that the number of active sites is large. Hydrogen bonds were found to be pivotal in the chiral recognition mechanism of this CSP. The enan-tioselectivity was adjusted by the methanol content in the organic mobile phase. Polysodium A-undecanoyl-L-leucyl-leucinate (poly-SULL) and —L-leucyl-valinate... 

Polymerized dipeptide surfactants, which are derived from sodium A-undecylenyl-L-valine-L-leucine (l-SUVL), sodium A-undecylenyl-L-leucine-L-valine (l-SULV), sodium A-undecylenyl-L-leucine-L-leucine (l-SULL), and sodium A-undecylenyl-L-valine-L-va-line (l-SUVV), were employed. Among these dipeptides, poly(L-SULV) showed the best enantioselectiv-ity for the separation of 1,1 -bi-2-naphthol (BN). 

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See also in sourсe #XX -- [ ]

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