PHOTOELECTRON SPECTROSCOPY OF GERMANIUM-FLUORINE BINARY CLUSTER ANIONS - THE HOMO-LUMO GAP ESTIMATION OF GE-N CLUSTERS

摘要

Electronic properties of germanium-fluorine cluster anions (GenFm-; n = 1-11, m = 1-3) were studied using photo-electron spectroscopy (PES) with a magnetic-bottle type electron spectrometer. Compared between the PES of GenF- and those of the Ge-n(-), it was found that the doped F atom in GenF- deprives each Ge-n(-) cluster of the excess electron without any serious rearrangement of the Ge-n framework. The F doping method enables us to estimate the HOMO-LUMO gap of the corresponding neutral Ge-n clusters (n = 4-11). For a diatomic GeF- cluster, furthermore, the vibrational structures could be resolved to determine its vibrational frequency. [References: 35]