Abstract
197Au Mossbauer spectra of a series of glutathionate-protected gold clusters, Aun(SG)m, with n = 10 − ~55, were re-analyzed to understand the structure evolution behavior. The numbers of gold atoms coordinated by different numbers (0, 1, and 2) of the GS ligands were successfully determined by assuming individual isomer shifts and quadrupole splittings for the three sites in Au25(SG)18 (Tsukuda et al., Chem Lett 40:1292, 2011). The analysis revealed the drastic structural evolution of Aun(SG)m in the range of n = 10 − ~55. In Au10(SG)10, all the gold atoms are bonded to GS ligands, indicating –Au–S(G)– cyclic structures. A catenane structure was proposed for Au10(SG)10. At n = 25, a single Au atom without the GS ligation appeared, consistent with the formation of an icosahedral Au13 core protected by six staples, –S(G)–[Au–S(G)–]2. At n = 39, it is considered that Au39(SG)24 has a similar structure to that of Au38(SC2H4Ph)24 with face-fused bi-icosahedral Au23 core.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
