Oggianu Mariangela, Mameli Valentina, Hernández-Rodríguez Miguel A, Monni Noemi, Souto Manuel, Brites Carlos D S, Cannas Carla, Manna Fabio, Quochi Francesco, Cadoni Enzo, Masciocchi Norberto, Carneiro Neto Albano N, Carlos Luís D, Mercuri Maria Laura
Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Monserrato I-09042, Italy.
INSTM, Via Giuseppe Giusti, 9, Firenze 50121, Italy.
Chem Mater. 2024 Mar 28;36(7):3452-3463. doi: 10.1021/acs.chemmater.4c00362. eCollection 2024 Apr 9.
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.
这项工作挑战了使用钕(Nd)荧光寿命变化来评估实验性钕到镱(Nd→Yb)能量转移速率和效率的传统方法。通过无溶剂热研磨合成近红外(NIR)发射的钕:镱混合金属配位聚合物(CPs),我们证明了之前被忽视的Nd [H→I]→Yb [F→F]途径,由于卓越的能量共振和能级选择规则兼容性,在能量转移中占主导地位。这一发现颠覆了传统上对Nd [F→I]→Yb [F→F]跃迁途径的关注。我们将NdYb(BTC)(HO)表征为一种有前景的低温NIR测温系统,并利用我们对能量转移的新理解进行模拟,得出了不同钕:镱比例下的理论测温参数和灵敏度。令人惊讶的是,实验测温数据与理论预测紧密匹配,验证了我们修正后的模型。这种关于Nd→Yb能量转移的新观点对Nd/Yb对具有普遍适用性,揭示了一个重要的光谱特征,对能量转移驱动的材料设计具有广泛影响。