A Ratio Fluorescence Thermometer Based on Carbon Dots & Lanthanide Functionalized Metal-Organic Frameworks

Physiological temperature is closely linked to biological processes and thus its precise sensing is essential. Lanthanide MOFs materials as fluorescence temperature sensors exhibits a plenty of advantages and have been explored as thermometers. However, the synthesis of Ln-MOFs are usually under tough conditions and suffered from unsatisfactory water stabilities. In addition, most fluorescence thermometers are based on temperature-dependent fluorescence intensity mechanism, which are heavily influenced by subtle changes and result in detection inaccuracy. Hence, we presented a dual-emitting composite material MOF-867@Eu3+@carbon dots as ratio fluorescence thermometers by simple post-modification strategy. This prepared MOF-867@Eu3+@CDs showed a highly splendid sensitivity in the range of 20-60 degrees C and showed low cell toxicity. It was expected that MOF-867@Eu3+@CDs could be promising candidates in physiological temperature sensing application.