To obtain ratiometric temperature sensor with high sensitivity we have synthesized three rows of bimetallic Tb-Eu hydroxybenzoates, whose sensitivity was expected to exceed the theoretical limit due to the presence of the temperature-dependent OH-quenching. Single crystals of two new bimetallic complexes were obtained, and their crystal structures were determined. Despite europium complexes with the selected ligands do not emit light, bimetallic Tb-Eu complexes with 3- and 4-hydroxybenzoates demonstrate europium luminescence with the quantum yield up to 77 %. Selected 3- and 4-hydroxybenzoates demonstrated temperature-dependent luminescence in the range of 25–100 °C. For 3-hydroxybenzoate of Tb-Eu, thermometer sensitivity reached 4 %/°C at 100 °C, which exceeds the expected limit of 3.3 %/°C at this temperature and is the highest reported value at this temperature. Temperature resolution is about 3 °C.

为了获得具有高灵敏度的比率温度传感器，我们合成了三排双金属 Tb-Eu 羟基苯甲酸酯，由于存在与温度相关的 OH 猝灭，预计其灵敏度将超过理论极限。获得了两种新型双金属配合物的单晶，并确定了它们的晶体结构。尽管与所选配体的铕配合物不发光，但与 3-和 4-羟基苯甲酸盐的双金属 Tb-Eu 配合物表现出铕发光，量子产率高达 77%。选定的 3-和 4-羟基苯甲酸酯在 25–100 °C 范围内表现出温度依赖性发光。对于 Tb-Eu 的 3-羟基苯甲酸酯，温度计灵敏度在 100 °C 时达到 4%/°C，超过了预期的限值 3。在此温度下为 3 %/°C，是此温度下报告的最高值。温度分辨率约为 3 °C。