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The enantioselective separation of MeO-PCB atropisomers improved with decreasing initial temperature and smaller temperature increments. (A) 3-MeO-PCB 98; (B) 3’-MeO-PCB 150; (C) 3’-MeO-PCB 154; (D) 4-MeO-PCB 136. The gas chromatographic conditions were as follows: helium flow 65 cm/s (3 ml/min), inlet and detector temperature 250°C (Please see Supplementary Figure S2 for a plot of the resolution versus the temperature increment for different initial temperatures).
