Figure 4
(a) S K-XANES spectra of reference Ni2+ coordination compounds ([Ni(TTCTD)]2+ and {[Ni(DTC)2]}, and the TU complexes of Ni2+, Co2+ and Zn2+; (b) first- and (c) second-derivative spectra (all resolved peaks are marked based on the second-derivative minimum positions). The white-line features for the TU complexes are formed by the C—S σ* transitions originating from varied chemical environments. |