Analytical separation techniques: toward achieving atomic precision in nanomaterials science

Abstract

The size- and shape-dependence of the properties are the most characteristic features of nanoscale matter. In many types of nanomaterials, there is a size regime wherein every atom counts. In...

Intracluster ligand rearrangement: an NMR-based thermodynamic study

“…18 Moreover, it will enable monitoring the ligand exchange of the same ligand between chemically (and magnetically) non-equivalent positions on the MNC, a task that could not be addressed with other election techniques for LER characterization like high performance liquid chromatography (HPLC) and MS techniques among others. [19][20][21] Here, we use variable temperature (VT) 1 H NMR experiments and dynamic-NMR simulations to extract for the first time the activation energy of the intracluster ligand rearrangement reaction (LRR) on [Ag 25 (DMBT) 18 ] − . We show how the process seems to happen without Ag-S bond breaking and how a modification of the composition of the metal nucleus reflects on this mechanism by studying it on [Ag 24 Au(DMBT) 18 ] − , [Au 25 (Oct) 18 ] − and [Au 25 (PET) 18 ] − .…”