This work challenges the conventional approach of using NdF lifetime changes for evaluating the experimental Nd → Yb energy transfer rate and efficiency. Using near-infrared (NIR) emitting Nd:Yb mixed-metal coordination polymers (CPs), synthesized via solvent-free thermal grinding, we demonstrate that the Nd [H → I] → Yb [F → F] pathway, previously overlooked, dominates energy transfer due to superior energy resonance and -level selection rule compatibility. This finding upends the conventional focus on the Nd [F → I] → Yb [F → F] transition pathway. We characterized NdYb(BTC)(HO) as a promising cryogenic NIR thermometry system and employed our novel energy transfer understanding to perform simulations, yielding theoretical thermometric parameters and sensitivities for diverse Nd:Yb ratios. Strikingly, experimental thermometric data closely matched the theoretical predictions, validating our revised model. This novel perspective on Nd → Yb energy transfer holds general applicability for the Nd/Yb pair, unveiling an important spectroscopic feature with broad implications for energy transfer-driven materials design.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11008107 | PMC |
| http://dx.doi.org/10.1021/acs.chemmater.4c00362 | DOI Listing |
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