Sportelli L, Neubacher H, Lohmann W
Z Naturforsch C Biosci. 1977 Jul-Aug;32(7-8):643-6. doi: 10.1515/znc-1977-7-826.
The complexation behaviour of Cu(II) with di- and tripeptides containing the aromatic amino acids phenylalanine or typtophan has been investigated at different pH-values and compared with results obtained with di- and triglycine. The results obtained by means of ESR and optical absorption spectroscopy show an influence of the two different aromatic entities on the magnetic and optical parameters. A significant decrease of the g11-value and, concomittantly, an increase of the energy of the d-d transition was measured when an aromatic entity is present in the peptide. A possible explanation for this observation is given.
研究了铜（II）与含有芳香族氨基酸苯丙氨酸或色氨酸的二肽和三肽在不同pH值下的络合行为，并与甘氨酸二肽和三肽的结果进行了比较。通过电子自旋共振（ESR）和光吸收光谱获得的结果表明，两种不同的芳香基团对磁学和光学参数有影响。当肽中存在芳香基团时，g11值显著降低，同时d-d跃迁能量增加。给出了对此观察结果的一种可能解释。
