Cation-Directed Host–Guest Assembly and Reversible Wheel to Cluster Interconversion in a 20-Molybdate System
Abstract
We report on the synthesis and structural characterization of the polyoxo-20-molybdate wheel, [MoVI₂₀O₆₀{AsO₂(CH₃)₂}₁₂]¹²⁻ (Mo20), which can be isolated with an empty cavity (diameter ca. 2 nm) or containing two dimethylarsinate guests, depending on the type of cations used during synthesis. The polyanion Mo20 was characterized by single-crystal XRD, FT-IR, and TGA, and in solution by multinuclear NMR (¹H, ¹³C, ⁹⁵Mo) and ¹H DOSY, as well as x-ray scattering (SWAXS) and mass spectrometry (ESI-MS). We demonstrated a fast, quantitative, and fully reversible transformation of Mo20 to [MoVI₄O₁₂(OH){AsO₂(CH₃)₂}]²⁻ (Mo4) in aqueous solution, whereas Mo20 is cleanly and quantitatively recrystallized from such solution, indicating a unique phenomenon, which is fully supported by all experimental techniques used as well as DFT and MD calculations.
Related
- Direct Observation of a Hydrogen‐Bonding Assisted Quasi‐Reversible Superoxo/Peroxo Interconversion in a Heme Model
- Pnictogen-Bond-Directed Self-Assembly of Sb and As Cages Enables Partitioning of Organic Reaction Media.
- pH-controlled reversible assembly of magnetic and plasmonic nanoparticles on gold nanorods
- Easy reversible clustering of gold nanoparticles via pH-Induced assembly of PVP-b-PAA copolymer
- Ligand-directed symmetry reduction and stereoselective assembly of C₃-symmetric topologically chiral trefoil knots.
BibTeX
@article{pal2026cationdirected,
title = {{Cation-Directed Host–Guest Assembly and Reversible Wheel to Cluster Interconversion in a 20-Molybdate System}},
author = {Arun Pal and Alisher Kuanysh and Vinaya Siby and Jana Hölscher and Nikolai Kuhnert and Albert Masip-Sánchez and Xavier López and Josep Poblet and Maria Boltoeva and Pierre Bauduin and Mohamed Haouas and Emmanuel Cadot and Ulrich Kortz},
journal = {Chemistry - A European Journal},
year = {2026},
month = sep,
doi = {10.1002/chem.71141},
url = {https://hal.science/hal-05769883v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Cation-Directed Host–Guest Assembly and Reversible Wheel to Cluster Interconversion in a 20-Molybdate System
AU - Arun Pal
AU - Alisher Kuanysh
AU - Vinaya Siby
AU - Jana Hölscher
AU - Nikolai Kuhnert
AU - Albert Masip-Sánchez
AU - Xavier López
AU - Josep Poblet
AU - Maria Boltoeva
AU - Pierre Bauduin
AU - Mohamed Haouas
AU - Emmanuel Cadot
AU - Ulrich Kortz
PY - 2026
DA - 2026/09/29
JO - Chemistry - A European Journal
DO - 10.1002/chem.71141
UR - https://hal.science/hal-05769883v1
AB - We report on the synthesis and structural characterization of the polyoxo-20-molybdate wheel, [MoVI₂₀O₆₀{AsO₂(CH₃)₂}₁₂]¹²⁻ (Mo20), which can be isolated with an empty cavity (diameter ca. 2 nm) or containing two dimethylarsinate guests, depending on the type of cations used during synthesis. The polyanion Mo20 was characterized by single-crystal XRD, FT-IR, and TGA, and in solution by multinuclear NMR (¹H, ¹³C, ⁹⁵Mo) and ¹H DOSY, as well as x-ray scattering (SWAXS) and mass spectrometry (ESI-MS). We demonstrated a fast, quantitative, and fully reversible transformation of Mo20 to [MoVI₄O₁₂(OH){AsO₂(CH₃)₂}]²⁻ (Mo4) in aqueous solution, whereas Mo20 is cleanly and quantitatively recrystallized from such solution, indicating a unique phenomenon, which is fully supported by all experimental techniques used as well as DFT and MD calculations.
SN - 0947-6539
SN - 1521-3765
ER -