Solid‐state synthesis of cyclo LD‐diphenylalanine: A chiral phase built from achiral subunits
作者:Ariel Pérez‐Mellor、Katia Le Barbu‐Debus、Anne Zehnacker
DOI:10.1002/chir.23195
日期:2020.5
The solid‐state structure of LL/DD or LD/DL diphenylalanine diluted in KBr pellets is studied by infrared (IR) absorption and vibrational circular dichroism (VCD) spectroscopy. The structure depends on the absolute configuration of the residues. The natural LL diphenylalanine exists as a mixture of neutral and zwitterionic structures, depending on the humidity of the sample, while mostly the zwitterion