Summary
The reversed phase chromatographic properties of the [G1]-L-glutamic and ethyl ester-AC-silica (1), [G2]-L-glutamic acid ethyl ester-AC-silica (2) and the [G1]-L-glutamic acidt-butyl ester-AC-silica (3) dendrimer stationary phases were evaluated. Initial studies involved the comparison between these phases with a classic reversed phase (i.e. ODS1) by the separation of a standard reversed phase test mixture composed of dimethylphthalate, nitrobenzene, anisole, diphenylamine and fluorene. Separations were achieved with comparable performance to those obtained with the conventional reversed phase (ODS1). However, it was apparent that the chromatographic selectivity exhibited by the dendrimer stationary phases was different from that of the ODS1 phase. On a per mole basis, the dendrimers exhibited similar (and sometimes greater) affinity for these analytes compared with the ODS1 ligand. Subsequent chromatographic experiments were conducted upon the dendrimer chiral stationary phases using chiral analytes under reversed phase and normal phase conditions. Chiral resolution was not observed.
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Note: column slurry packed at Phase Separations/Waters Corporation, Cheshire, UK.
Note: internal standards provided by Phase Separations/Waters Corporation.
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Mathews, B.T., Beezer, A.E., Snowden, M.J. et al. Evaluation of novel dendrimer chiral stationary phases using HPLC. Chromatographia 53, 147–155 (2000). https://doi.org/10.1007/BF02491562
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DOI: https://doi.org/10.1007/BF02491562