LAQV-REQUIMTE Departamento de Química, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal.
Centro de Ciências e Tecnologias Nucleares (C2TN), DECN, Instituto Superior Técnico, Estrada Nacional 10, 2695-066, Bobadela, Portugal.
Chempluschem. 2020 Mar;85(3):580-586. doi: 10.1002/cplu.202000034.
An unusual thermally sensitive anion-cation interaction, which is characteristic of the anion [Eu(FOD) ] , occurs in the complex [CHOL][Eu(FOD) ] (1; CHOL=choline; FOD=1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedionate) and affects both quantum yield and thermochromic behavior. This prompted the design of an Eu -based ratiometric thermometer that functions at temperatures up to 95 °C through a thermally excited state absorption of the Eu ion. The reusable temperature-sensitive luminescent complex showed a range of relative sensitivity between 0.45 % C at 25 °C, with an increase to 7.0 % C at 95 °C. Confinement of compound 1 in a transparent film of polysulfone resulted in a higher thermal stability of 1 while its luminescence showed a strong temperature dependence.
一种不寻常的热敏阴阳离子相互作用存在于配合物 [CHOL][Eu(FOD) ]（1；CHOL=胆碱；FOD=1,1,1,2,2,3,3-七氟-7,7-二甲基-4,6-辛二酮）中，该相互作用是阴离子 [Eu(FOD) ] 的特征，这影响了量子产率和热致变色行为。这促使我们设计了一种基于 Eu 的比率温度计，该温度计通过 Eu 离子的热激发态吸收在高达 95°C 的温度下工作。可重复使用的温度敏感发光配合物在 25°C 时的相对灵敏度范围为 0.45%℃，在 95°C 时增加到 7.0%℃。将化合物 1 限制在聚砜透明膜中，提高了 1 的热稳定性，同时其发光表现出很强的温度依赖性。
