2024/12/16 by Timur Biktagirov, Biktagirov, Timur, Eugenio Otal +18 · 1 voice
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Crystal Structures and Properties #FOS: Physical sciences #Geological and Geophysical Studies #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.2412.11591
openalex publication_date 2024/12/16 · arxiv published 2024/12/16 · openalex created_date 2024/12/18 · arxiv updated 2025/12/07 · openalex updated_date 2026/07/30
Metal-organic frameworks (MOFs), with their high porosity and large internal surface area, provide versatile platforms for integrating spin centers with potential applications in catalysis and quantum sensing. Here, we identify a stable NH radical spin center in UiO-66-NH2, a zirconium-based MOF with aminoterephthalic acid (TPA-NH2) linkers. Using electron paramagnetic resonance spectroscopy and density functional theory calculations, we determine the nature and spin Hamiltonian parameters of this radical. We also demonstrate that the NH spin center exhibits a relatively long coherence time, making it a strong candidate for quantum sensing. Since this spin center is intrinsic to TPA-NH2 linkers, our findings open new directions for leveraging organic radicals in MOFs for quantum technologies beyond the UiO-66-NH2 family.