Back to Search
Start Over
High magnetization reversal barriers in luminescent dysprosium octahedral and pentagonal bipyramidal single-molecule magnets based on fluorinated alkoxide ligands.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 6/28/2021, Vol. 50 Issue 24, p8487-8496, 10p
- Publication Year :
- 2021
-
Abstract
- We report the synthesis and structures of three luminescent dysprosium(III) complexes based on fluorinated alkoxide ligands of formulas [Dy(L<superscript>1</superscript>)<subscript>2</subscript>(THF)<subscript>4</subscript>][BPh<subscript>4</subscript>]·0.5THF (1), [Dy(L<superscript>2</superscript>)<subscript>2</subscript>(THF)<subscript>5</subscript>][BPh<subscript>4</subscript>]·2.5THF (2) and [Dy(L<superscript>3</superscript>)<subscript>2</subscript>(THF)<subscript>5</subscript>][BPh<subscript>4</subscript>]·2THF (3) (L<superscript>1</superscript> = (CF<subscript>3</subscript>)<subscript>3</subscript>CO<superscript>−</superscript>, L<superscript>2</superscript> = C<subscript>6</subscript>F<subscript>5</subscript>C<subscript>6</subscript>F<subscript>4</subscript>O<superscript>−</superscript>, L<superscript>3</superscript> = C<subscript>6</subscript>F<subscript>5</subscript>C(CH<subscript>3</subscript>)O<superscript>−</superscript>). Despite the different dysprosium ion geometries (octahedral vs. distorted pentagonal bipyramidal), these systems exhibit a single-molecule magnet (SMM) behavior, but with distinct relaxation dynamics. Moreover, a typical dysprosium-based luminescence is observed for the three complexes, which make them bifunctional magneto-luminescent SMMs. Remarkably, complex 3 exhibits a high anisotropy barrier of 1469 cm<superscript>−1</superscript> and a blocking temperature of 22 K, making it one of the most performant alkoxide-based SMMs with the highest blocking temperature for a luminescent SMM. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 50
- Issue :
- 24
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 151047532
- Full Text :
- https://doi.org/10.1039/d1dt01319j