Issue 10, 2024

Cyclic ion mobility of doped [MAu24L18]2− superatoms and their fragments (M = Ni, Pd and Pt; L = alkynyl)

Abstract

Collision-induced dissociation and high-resolution cyclic ion mobility mass spectrometry, along with quantum chemical calculations and trajectory simulations, were used to compare the structures of isolated [MAu24(C[triple bond, length as m-dash]CR)18]2−, M = Ni, Pd, or Pt, and their associated fragment ions. The three different alkynyl ligand-stabilized (C[triple bond, length as m-dash]CR, R = 3,5-(CF3)2C6H3), transition metal-doped, gold cluster dianions showed mutually resolvable collision cross sections (CCS), which were ordered consistently with their molecular structures from X-ray crystallography. All three [MAu24(C[triple bond, length as m-dash]CR)18]2− species fragment by sequential diyne loss to form [MAu24(C[triple bond, length as m-dash]CR)18−n]2−, with n up to 12. The resultant fragment isomer distributions are significantly n- and M-dependent, and hint at a process involving concerted elimination of adjacent ligands. In particular [NiAu24(C[triple bond, length as m-dash]CR)18]2− also fragments to generate alkyne-oligomers, an inference supported by the parallel observation of precursor dianion isomerization as collision energy is increased.

Graphical abstract: Cyclic ion mobility of doped [MAu24L18]2− superatoms and their fragments (M = Ni, Pd and Pt; L = alkynyl)

Supplementary files

Article information

Article type
Paper
Submitted
20 Dec 2023
Accepted
19 Feb 2024
First published
20 Feb 2024
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2024,26, 8408-8418

Cyclic ion mobility of doped [MAu24L18]2− superatoms and their fragments (M = Ni, Pd and Pt; L = alkynyl)

F. Hennrich, S. Ito, P. Weis, M. Neumaier, S. Takano, T. Tsukuda and M. M. Kappes, Phys. Chem. Chem. Phys., 2024, 26, 8408 DOI: 10.1039/D3CP06192B

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements