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Updated: Mar 21, 2026

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
Unravelling the reactions between a hydride-protected Ag18 nanocluster and thiol by the crystallization of
Subrata Duary1, Samapti Mondal1, Souvik Manna2
1DST Unit of Nanoscience (DST UNS) and Thematic Unit of Excellence (TUE), Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India. pradeep@iitm.ac.in.
Abstract:
Despite the significant progress accomplished in the synthesis and characterization of atomically precise noble metal nanoclusters (APCs) through ligand exchange-induced structural transformation (LEIST), an in-depth understanding of the chemistry remains elusive. Herein, we report a study of the transformation of [Ag18H16(TPP)10]2+ (where H- and TPP are hydride and triphenyl phosphine ligands, respectively) into smaller molecular entities upon ligand exchange with TFMBT-H (acronym for 2,3,5,6-tetrafluoro-4-(trifluoromethyl) benzenethiol) at different stoichiometric ratios, and investigate the reaction pathways using experimental and computational approaches. Different products, namely, [Ag(TFMBT)(TPP)3], [Ag6(TFMBT)6(TPP)6] and [Ag7(TFMBT)8(TPP)9], were formed depending on the cluster to thiol ratio. The study shows that the composition provides a valuable handle for isolating and characterizing the intermediates involved in the ligand exchange process of clusters.
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