Please use this identifier to cite or link to this item: https://dspace.iiti.ac.in/handle/123456789/15540
Title: Stable Dimer Intermediates during Intercluster Reactions of Atomically Precise Nanoclusters
Authors: Roy, Diptendu Sinha
Pathak, Biswarup
Issue Date: 2025
Publisher: American Chemical Society
Citation: Acharya, S., Roy, J., Roy, D., Pathak, B., & Pradeep, T. (2025). Stable Dimer Intermediates during Intercluster Reactions of Atomically Precise Nanoclusters. Journal of Physical Chemistry C. Scopus. https://doi.org/10.1021/acs.jpcc.4c07077
Abstract: Intercluster reactions involving atomically precise noble metal nanoclusters (NCs) in solution, closely resembling reactions between molecules, are important for exploring chemistry on the nanoscale. In the present study, we conducted reactions between [Ag29(1,3-BDT)12]3- (1,3-BDT = 1,3-benzenedithiol) and center-doped [MAg24(2,4-DMBT)18]q− (q = 1 for M = Ag, Au; and q = 2 for M = Pd, Pt; 2,4-DMBT = 2,4-dimethylbenzenethiol) NCs in solution. For the first time, we report the formation of stable dimers, formed between two NCs with mixed metal-ligand interfaces. The dimeric species formed were [MAg53-xBDT12DMBT18-y]3- (x ≥ 0 and y ≥ 0), with 16 electrons in their valence shells. Here, the dimers were formed irrespective of the nature of the central atom in the NC, although the compositions were different depending on the central atom. These dimers were stable in solution for ∼2 days. The dithiol-protected [Ag29BDT12]3- part was more stable in the dimers, during fragmentation than the monothiol-protected [MAg24DMBT18]q− part. UV/vis spectroscopic and mass spectrometric analyses, along with density functional theory calculations, were used to understand the dimers. Our work highlighted the importance of the cluster interface in the stability of the dimer formed. Probing such stable dimers formed during intercluster reactions can help us understand the reaction mechanism in greater detail. © 2025 American Chemical Society.
URI: https://doi.org/10.1021/acs.jpcc.4c07077
https://dspace.iiti.ac.in/handle/123456789/15540
ISSN: 1932-7447
Type of Material: Journal Article
Appears in Collections:Department of Chemistry

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