Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany.
Deutsches Elektronen Synchrotron (DESY), 22607 Hamburg, Germany.
Molecules. 2021 Oct 26;26(21):6469. doi: 10.3390/molecules26216469.
In this paper, we report X-ray absorption and core-level electron spectra of the nucleobase derivative 2-thiouracil at the sulfur L- and L-edges. We used soft X-rays from the free-electron laser FLASH2 for the excitation of isolated molecules and dispersed the outgoing electrons with a magnetic bottle spectrometer. We identified photoelectrons from the 2p core orbital, accompanied by an electron correlation satellite, as well as resonant and non-resonant Coster-Kronig and Auger-Meitner emission at the L- and L-edges, respectively. We used the electron yield to construct X-ray absorption spectra at the two edges. The experimental data obtained are put in the context of the literature currently available on sulfur core-level and 2-thiouracil spectroscopy.
本文报道了核苷碱基衍生物 2-硫尿嘧啶在硫 L 边和 L 边的 X 射线吸收和芯层电子能谱。我们使用自由电子激光 FLASH2 的软 X 射线来激发孤立分子，并使用磁瓶谱仪来分散出射电子。我们分别在 L 边和 L 边识别了来自 2p 芯轨道的光电电子，伴随着电子相关卫星，以及共振和非共振的 Coster-Kronig 和 Auger-Meitner 发射。我们使用电子产额在两个边缘构建了 X 射线吸收光谱。获得的实验数据与当前关于硫芯层和 2-硫尿嘧啶光谱学的文献相结合。
