What is the maximum charge uptake of Lindqvist-type polyoxovanadates in organic-inorganic heterostructures?

Anastasia S. Sorokina, Dmitry A. Ryndyk, Kirill Yu Monakhov, Thomas Heine

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

One of the striking characteristics of the tris(alkoxo)-ligated Lindqvist-type polyoxovanadates [VV6O13{(OCH2)3CR}2]2− in highest oxidation state in solution is the ease of their chemical post-functionalization via the R group. On surfaces it is their conductivity as a function of individual V(3d) redox states. In both cases, the structural stability of the fully-oxidized dianion is enabled by charge-balancing counterions. In this Article, we explore the charge stability and the charge distibution across the molecular Lindqvist-type hexavanadate structure regarding the R functionality (R = OC2H4N3, CH2N3, and O3C29H36N5) and the different type of countercations (Cat = K+, Li+, NH4+, H+, or Mg2+). We show that the hexavanadate core can accept in its vacant V(3d) orbitals at least four and, in some cases, up to nine additional electrons if the negative charge is offset by the corresponding cation(s), without electron leakage to the covalently attached R groups. Remarkably, the maximum number of accepted electrons strongly depends on the type of cation(s) and is independent on the type of the remote R group exploited herein. The (Cat)n[VV6O13{(OCH2)3CR}2] complexes exibit the structural integrity in all studied charged states. Our study demonstrates the importance of the countercations of multistate polyoxovanadate nanoswitches for the development of multi-charge based molecular memories and/or batteries.

Original languageEnglish
Pages (from-to)26848-26852
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume24
Issue number43
DOIs
Publication statusPublished - 2022 Oct 24

Bibliographical note

Funding Information:
The authors acknowledge the support from the Leibniz Association through the Leibniz Collaborative Excellence funding program (iMolKit). ZIH Dresden is thanked for computational resources.

Publisher Copyright:
© 2022 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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