@article {156, title = {The Au25(SR)18 cluster carrying icosahedral dodecaborate and glutathione ligands: A spectroscopic view}, journal = {Journal of Physics and Chemistry of Solids}, year = {2020}, type = {Primary research article}, abstract = {

The functionality of Au25(S-glutathione)18 clusters change when some of the ligands in the cluster shell are replaced for other species. In this study we report on the synthesis and characterisation of a new cluster in which undecahydro-closo-dodecaborate thiolates are introduced as constituents of the shell surrounding the gold core. This is the first reported example in which the Au13 core of the Au25(S-glutathione)18 cluster is covered with an Au{\textendash}S{\textendash}B linkage instead of an Au{\textendash}S{\textendash}C on the dimeric shell units using a ligand exchange reaction. The spectra of the new cluster species clearly indicate a successful ligand exchange while retaining the gold core with undisrupted semirings containing both thiolate species. The resulting clusters were identified as Au25 [(S-glutathione)18-x (S-closo-borate)x-)] (x\ =\ 3, 4). Despite the achiral character of the closo-borate thiolates entering the semiring, increased chirality traces were observed in the high-energy region. Circular dichroism (CD) responses are ligand dependent and provide a fingerprint characteristic of the ligands present in the cluster. The next generation of such surface functionalized clusters provides unique base for computational and application studies.

}, keywords = {Chirality, Coating, Optoelectronic nanomaterials, Spectroscopy}, doi = {https://doi.org/10.1016/j.jpcs.2020.109838}, url = {https://www.sciencedirect.com/science/article/pii/S0022369720307411?via\%3Dihub}, author = {Eva Valusova and Maria Kanuchova and Tomas Base and Viktor Viglasky and Marian Antalik} }