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Switching the coordination geometry to enhance erbium(III) single-molecule magnets

Chinese Chemical Letters, ISSN: 1001-8417, Vol: 34, Issue: 5, Page: 107547
2023
  • 14
    Citations
  • 0
    Usage
  • 3
    Captures
  • 0
    Mentions
  • 0
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    14
    • Citation Indexes
      14
  • Captures
    3

Article Description

Two erbium(III) complexes [ErCl(OAr Ad ) 3 ][Na(THF) 6 ] ( 1 ) and Er(OAr Ad ) 3 ( 2 ) are successfully prepared by using one variety of "hard" base ligand with large steric hindrance. The coordination geometry around the Er(III) site changes from distorted tetrahedral to flat trigonal pyramid geometry in different solvent environment due to the removal of the coordinated chloride. Such an alternation significantly enhances the single-molecule magnet (SMM) behavior and makes the field-induced effective energy barrier ( U eff ) arrive at 43(1) cm −1 for the latter. Together with theoretical calculations, this study shows that strong equatorial ligand field and high local symmetry are critical to suppress the quantum tunneling of the magnetization (QTM) and achieve high-performance erbium(III) based SMMs.

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