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Rigid Dysprosium(III) Single‐Molecule Magnets Exhibit Preserved Superparamagnetism in Solution

Rigid Dysprosium(III) Single‐Molecule Magnets Exhibit Preserved Superparamagnetism in Solution Molecules with long preserved magnetic moments are perceived as the smallest units for storing bytes, which could bring a new revolution for information technology. However, the rational design of such molecules remains challenging. Here two rigid adamantanol ligand based dysprosium(III) complexes ([Dy(1‐AdO)2(py)5]BPh4 ‐ 1 and [Dy(2‐AdO)2(py)5]BPh4 ‐ 2) with pentagonal‐bipyramidal coordination geometry and local D5h symmetry were successfully prepared, which display excellent single‐molecule magnet (SMM) behavior (Ueff ≈ 1835 K, TBZFC ≈ 24 K, TB100s ≈ 17 K and TBH = 23 K for 1; Ueff ≈ 1756 K, TBZFC ≈ 20 K, TB100s ≈ 16 K and TBH = 23 K for 2) due to the much weakened vibration in low energy regimes. Remarkably, the large energy barriers and high blocking temperatures for these two complexes in solid states are well preserved in solution. This is never observed in previous studies of SMMs, indicating that the adamantanol is rigid and can be introduced to make the composed molecules stable enough to maintain the solid state magnetic property in solution. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Chemistry Wiley

Rigid Dysprosium(III) Single‐Molecule Magnets Exhibit Preserved Superparamagnetism in Solution

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References (21)

Publisher
Wiley
Copyright
© 2022 SIOC, CAS, Shanghai, & WILEY‐VCH GmbH
eISSN
1614-7065
DOI
10.1002/cjoc.202100722
Publisher site
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Abstract

Molecules with long preserved magnetic moments are perceived as the smallest units for storing bytes, which could bring a new revolution for information technology. However, the rational design of such molecules remains challenging. Here two rigid adamantanol ligand based dysprosium(III) complexes ([Dy(1‐AdO)2(py)5]BPh4 ‐ 1 and [Dy(2‐AdO)2(py)5]BPh4 ‐ 2) with pentagonal‐bipyramidal coordination geometry and local D5h symmetry were successfully prepared, which display excellent single‐molecule magnet (SMM) behavior (Ueff ≈ 1835 K, TBZFC ≈ 24 K, TB100s ≈ 17 K and TBH = 23 K for 1; Ueff ≈ 1756 K, TBZFC ≈ 20 K, TB100s ≈ 16 K and TBH = 23 K for 2) due to the much weakened vibration in low energy regimes. Remarkably, the large energy barriers and high blocking temperatures for these two complexes in solid states are well preserved in solution. This is never observed in previous studies of SMMs, indicating that the adamantanol is rigid and can be introduced to make the composed molecules stable enough to maintain the solid state magnetic property in solution.

Journal

Chinese Journal of Chemistry – Wiley

Published: Mar 1, 2022

Keywords: Molecular magnets; Lanthanide; D 5h ‐symmetry; Superparamagnetism; Solution

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