Magnetic Control of NIR Lanthanide Emission in Molecular Complexes
- 1Department of Chemistry
- 2University of Connecticut
Abstract
Magnetic modulation of luminescence has not been realized in molecular lanthanide complexes, whose spin–orbit coupled 4f excited states are well shielded from external perturbations. Here, we report molecular lanthanide complexes whose photoluminescence is controllably modulated by a magnetic field below 1 T through the spin dynamics of spin-correlated radical pairs (SCRPs). SCRPs, generated by photoexcitation of donor–bridge–acceptor molecules, undergo spin-selective radical pair recombination, thereby gating the energy-transfer pathway to the emissive lanthanide center (Ln 3+ ) through a pendant triplet acceptor in Ln 3+ complexes. Application of an external magnetic field alters the singlet–triplet SCRP interconversion, leading to field-dependent modulation of Ln 3+ emission intensity by up to 50%. This effect is observed at room temperature and is fully reversible. The successful demonstration of SCRP-mediated magnetic control of the Ln 3+ emission establishes a new design paradigm for magneto-responsive lanthanide materials and identifies SCRPs as viable quantum control elements for f-element luminescence.
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BibTeX
@misc{gasior2026magnetic,
title = {{Magnetic Control of NIR Lanthanide Emission in Molecular Complexes}},
author = {Ashly Gasior and Savana Correll and Saizhen Hu and Duohui Yan and Noen Jian and Tomoyasu Mani},
howpublished = {ChemRxiv},
year = {2026},
month = sep,
doi = {10.26434/chemrxiv.15008632/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008632/v1},
note = {CC BY-NC-ND},
}
RIS
TY - UNPB
TI - Magnetic Control of NIR Lanthanide Emission in Molecular Complexes
AU - Ashly Gasior
AU - Savana Correll
AU - Saizhen Hu
AU - Duohui Yan
AU - Noen Jian
AU - Tomoyasu Mani
PY - 2026
DA - 2026/09/10
PB - ChemRxiv
DO - 10.26434/chemrxiv.15008632/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008632/v1
AB - Magnetic modulation of luminescence has not been realized in molecular lanthanide complexes, whose spin–orbit coupled 4f excited states are well shielded from external perturbations. Here, we report molecular lanthanide complexes whose photoluminescence is controllably modulated by a magnetic field below 1 T through the spin dynamics of spin-correlated radical pairs (SCRPs). SCRPs, generated by photoexcitation of donor–bridge–acceptor molecules, undergo spin-selective radical pair recombination, thereby gating the energy-transfer pathway to the emissive lanthanide center (Ln 3+ ) through a pendant triplet acceptor in Ln 3+ complexes. Application of an external magnetic field alters the singlet–triplet SCRP interconversion, leading to field-dependent modulation of Ln 3+ emission intensity by up to 50%. This effect is observed at room temperature and is fully reversible. The successful demonstration of SCRP-mediated magnetic control of the Ln 3+ emission establishes a new design paradigm for magneto-responsive lanthanide materials and identifies SCRPs as viable quantum control elements for f-element luminescence.
ER -