Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, B.P. 48, 91192 Gif-sur-Yvette, France.
Phys Chem Chem Phys. 2011 Sep 14;13(34):15432-6. doi: 10.1039/c1cp21211g. Epub 2011 Jul 18.
Gas phase VUV single-photon photoionization spectroscopy of electrospray-produced multiply protonated cytochrome c protein (12 kDa) has been performed by means of coupling a linear quadrupole ion trap with a synchrotron beamline. The thresholds for the ionization of the 8+ and 11+ charge state precursors to radical 9+ and 12+ species were measured to be 12.75 ± 0.10 and 13.51 ± 0.10 eV, respectively.
采用同步辐射光束线将线性四极离子阱与电喷雾产生的多质子化细胞色素 c 蛋白（12 kDa）的气相 VUV 单光子光电离光谱学相结合，对其进行了研究。测量得到 8+和 11+价态前体自由基 9+和 12+的电离阈值分别为 12.75 ± 0.10 eV 和 13.51 ± 0.10 eV。
