Work

Data for: Amplified electron-spin thermal sensitivity in Mn(II) complexes

Year: 2026

Type: dataset

Abstract: Understanding the temperature sensitivity of magnetic resonance properties is an essential step toward any application of spin, whether for novel molecular thermometers or quantum sensing platforms. In that light, demonstrations that molecular design is effective at controlling the temperature dependence of zero-field splitting (D), a critical property that governs the electron paramagnetic resonance (EPR) response of open-shell molecules, are vital. Herein we show that ligand design controls the temperature dependence of D. To do so, we prepared and analyzed three different encapsulated Mn(II) complexes. High-field, high-frequency EPR spectroscopy reveal EPR spectra for all complexes that vary in width as a function of temperature, indicating a change in D value. At lower temperatures, these temperature sensitivities change starkly with ligand shell, ranging from 2.2 to 9.8 MHz/K. These results are demonstrate the ability to tune the variable-T nature of D by molecular design, the first such for the Mn(II) metal ion, and exhibit orders of magnitude enhancement over the nitrogen vacancy center of diamond (ca. 74 kHz/K).

Source: DRYAD

DOI: 10.5061/dryad.bcc2fqzpj

Authors: Campanella, Anthony, Gin, Amanda, Sung, Siyoung, Jackson, Cassidy, Martinez, Roxanna, Üngör, Ökten, Dasari, Srikanth, Ozarowski, Andrew, Bhowmick, Indrani, Zadrozny, Joseph

Institutions: Colorado State University, The Ohio State University, National High Magnetic Field Laboratory

Language: English

Topic: Magnetism in coordination complexes

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, National Institute of Biomedical Imaging and Bioengineering

Awards: G151307347, TOWARD A PHOTOMAGNETIC MECHANISM FOR F-ELEMENT SEPARATIONS

OpenAlex ID: W7167697492

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