一种具有LMCT带的发光双核铕/铽配合物作为单分子热传感器。
A Luminescent Dinuclear Eu /Tb Complex with LMCT Band as a Single-Molecular Thermosensor.
作者信息
Yanagisawa Kei, Kitagawa Yuichi, Nakanishi Takayuki, Seki Tomohiro, Fushimi Koji, Ito Hajime, Hasegawa Yasuchika
机构信息
Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
Faculty of Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
出版信息
Chemistry. 2018 Feb 6;24(8):1956-1961. doi: 10.1002/chem.201705021. Epub 2018 Jan 16.
Temperature-dependent luminescence of a dinuclear Eu /Tb complex with a seven-coordinate structure is demonstrated. The dinuclear complex is composed of two lanthanide ions, six tetramethylheptanedionate ligands, and a bidentate phosphine oxide linker ligand. The dinuclear structure of the complex was characterized by single-crystal XRD. Intrinsic 4f-4f emission quantum yields of the dinuclear Eu and Tb complexes were 66 and 61 %, respectively. The luminescence color of the dinuclear Eu /Tb complex changed from red to green with increasing temperature. The thermosensing range based on the ratio of luminescence intensity (A /A ) was 100-450 K. The temperature-dependent luminescence is due to the presence of a ligand-to-metal charge-transfer state.
证明了具有七配位结构的双核铕/铽配合物的温度依赖性发光。该双核配合物由两个镧系离子、六个四甲基庚二酮配体和一个双齿氧化膦连接配体组成。通过单晶XRD对该配合物的双核结构进行了表征。双核铕和铽配合物的本征4f-4f发射量子产率分别为66%和61%。随着温度升高，双核铕/铽配合物的发光颜色从红色变为绿色。基于发光强度比（A/A）的热传感范围为100-450 K。温度依赖性发光归因于配体到金属的电荷转移态的存在。
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