Work

Molecular Design for Optically Induced Magnetization: Targeting Excited State Orbital Degeneracy in Tungsten(V) Complexes

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide The rise of quantum information science has spurred chemists to prepare new molecules that serve as useful building blocks in quantum technologies of the future. Implementation of molecular spin-based qubits requires new methods to induce high spin polarization of samples. Herein, we report design criteria to develop axially symmetric spin-1/2 molecules amenable to optically induced magnetization (OIM), a technique using circularly polarized (CP) excitation to deliver spin polarization. We apply these criteria to develop a series of tungsten(V) chalcogenide complexes that are demonstrated to have large spin-sensitive responses to CP light using magnetic circular dichroism (MCD) that could allow up to ∼20% spin polarization through OIM. Pulsed electron paramagnetic resonance (EPR) spectra reveal these systems have improved relaxation times over molecules like K 2 IrCl 6, a species recently investigated by OIM, and field-swept electron spin–echo (FS-ESE) experiments show they have a remarkable lack of anisotropy in their phase-memory T m times. The design criteria are general and point toward future ways to improve OIM-initializable qubits.

Source: Journal of the American Chemical Society

DOI: 10.1021/jacs.5c03783

Authors: Ian E. Ramsier, Alysia Mandato, Sunil Saxena, Wesley J. Transue

Institution: University of Pittsburgh

Language: English

Topic: Magnetism in coordination complexes

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500

Funders: University of Pittsburgh, United States-Israel Binational Science Foundation