Luminescent lanthanide‐based coordination polymers (LnCPs) present great potential in low‐temperature detection due to their convenience in contactless readout. High quantum yields and energy transfer efficiency are favored by LnCPs as luminescent thermometer. In this work, based on the thermogravimetric analysis and temperature‐dependent powder x‐ray diffraction, coordinated and isolated molecules of [Ln2(mip)3(H2O)8·4H2O]∞ (abbreviated as Ln2MIP) were removed by dehydration process. Combining luminescent measurement and calculation, both quantum yields and energy transfer efficiency between Tb3+ and Eu3+ have been greatly enhanced. Additionally, the Eu3+ intensity of dehydrated Gd0.2Tb1.08Eu0.72MIP displays excellent temperature sensing ability from 77 to 300 K with enhanced relative sensitivity. These results demonstrate the potential of LnCPs in low‐temperature sensing with high quantum yields and energy transfer efficiency.

中文翻译：

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镧系元素配位聚合物在低温范围内用作发光温度计的高量子产率和能量传递效率


基于发光镧系元素的配位聚合物 （LnCP） 由于在非接触式读数中具有便利性，因此在低温检测中具有巨大的潜力。LnCP 作为发光温度计，具有较高的量子产率和能量转移效率。本工作基于热重分析和温度依赖性粉末 X 射线衍射，通过脱水过程去除了 [Ln2（mip）3（H2O）8·4H2O]∞ （简称 Ln2MIP）的配位和分离分子。结合发光测量和计算，Tb3+ 和 Eu3+ 之间的量子产率和能量转移效率都得到了极大的提高。此外，脱水 Gd0.2Tb1.08Eu0.72MIP 的 Eu3+ 强度在 77 至 300 K 范围内表现出优异的温度传感能力，并具有增强的相对灵敏度。这些结果表明 LnCPs 在低温传感中具有高量子产率和能量转移效率的潜力。