The distinctive pre-edge feature in the X-ray absorption spectra of copper(I) oxide and the diamminecopper(I) ion at the copper K-edge has been studied using synchrotron radiation. The relative intensities of these features, which are characteristic of copper(I) compounds, have been measured via the peak areas. The intensity of the oxide peak, with regard to the diammine and other two-coordinate copper environments, is anomalous, being reduced by ca. 60%. This is attributed to the macromolecular nature of the oxide, and the formation of intense excitons. Effects due to the small degree of non-stoichiometry may play and additional part in modifying pre-edge intensity by influencing the exciton lifetime.
铜(I)氧化物和二
氨合
铜(I)离子在
铜K-edge处的X射线吸收光谱中独特的预边缘特征已经通过同步辐射进行了研究。这些特征是
铜(I)化合物的特征,其相对强度已通过峰值面积进行了测量。相对于二
氨和其他二价
铜环境,氧化物的峰值强度异常,减少了约60%。这是由于氧化物的分子大,形成了强烈的激子。非
化学计量的小程度的影响可能会通过影响激子的寿命来改变预边缘强度。