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The Au25(SR)18 cluster carrying icosahedral dodecaborate and glutathione ligands: A spectroscopic view
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SYSNO ASEP 0534466 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Au25(SR)18 cluster carrying icosahedral dodecaborate and glutathione ligands: A spectroscopic view Author(s) Valušová, E. (SK)
Kaňuchová, M. (SK)
Baše, Tomáš (UACH-T) RID, SAI, ORCID
Víglaský, V. (SK)
Antalík, M. (SK)Article number 109838 Source Title Journal of Physics and Chemistry of Solids. - : Elsevier - ISSN 0022-3697
Roč. 150, MAR (2021)Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords Optoelectronic nanomaterials ; Spectroscopy ; Coating ; Chirality Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry Method of publishing Open access with time embargo (01.03.2022) Institutional support UACH-T - RVO:61388980 UT WOS 000605608400005 EID SCOPUS 85095823617 DOI 10.1016/j.jpcs.2020.109838 Annotation 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–S–B linkage instead of an Au–S–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. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0316487
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