作者: Esra Ogun , Okan Esenturk , Emren Nalbant Esenturk
DOI: 10.1016/J.ICA.2019.02.041
关键词: Crystallography 、 Fluorescence spectroscopy 、 Nickel 、 Molecular vibration 、 Absorption band 、 Cluster (physics) 、 Molecular electronic transition 、 Chemistry 、 Spectral line 、 Crystal structure
摘要: Abstract Vibrational and optical properties of Ni-Ge clusters ([Ni2Ge9(PPh3)]2−, [Ni6Ge13(CO)5]4−) have been investigated via UV–Vis, FTIR, Fluorescence spectroscopies. Moreover, frequency time-dependent (TD) electronic transition calculations performed to better characterize experimental findings, due the scarcity vibrational spectroscopic studies on these type in literature. UV–Vis analyses demonstrate a broad absorption band, with maximum at 270 nm for both clusters. [Ni6Ge13(CO)5]4− cluster band is broader has shoulder around 320 nm. modes associated appear low-frequency region FTIR spectra. spectrum very rich as expected higher number atoms structure. Main [Ni2Ge9(PPh3)]2− are observed 318(m) cm−1 130(w) cm−1, those 232(s) cm−1 155(s) cm−1. Similarities between simulated spectra strongly support stable, isolated behavior crystal analysis demonstrates that excitation 260 nm resulted relatively strong emissions 400 nm 410 nm, respectively. two few examples Zintl ion characterized analyses, only ones studied fluorescence spectroscopy.