التفاصيل البيبلوغرافية
| العنوان: |
Cooperative Sensitization Upconversion in Solution Dispersions of Co‐Crystal Assemblies of Mononuclear Yb3+ and Eu3+ Complexes. |
| المؤلفون: |
Sun, Guotao, Xie, Yao, Wang, Yuxin, Mandl, Gabrielle A., Maurizio, Steven L., Zhang, Hongjie, Ottenwaelder, Xavier, Capobianco, John A., Sun, Lining |
| المصدر: |
Angewandte Chemie International Edition; 6/12/2023, Vol. 62 Issue 24, p1-6, 6p |
| مصطلحات موضوعية: |
PHOTON upconversion, YTTERBIUM, LUMINESCENCE, DIBENZOYLMETHANE, ENERGY transfer, DISPERSION (Chemistry) |
| مستخلص: |
Lanthanide upconversion luminescence in nanoparticles has prompted continuous breakthroughs in information storage, temperature sensing, and biomedical applications, among others. Achieving upconversion luminescence at the molecular scale is still a critical challenge in modern chemistry. In this work, we explored the upconversion luminescence of solution dispersions of co‐crystals composed of discrete mononuclear Yb(DBM)3Bpy and Eu(DBM)3Bpy complexes (DBM: dibenzoylmethane, Bpy: 2,2′‐bipyridine). The 613 nm emission of Eu3+ was observed under excitation of Yb3+ at 980 nm. From the series of molecular assemblies studied, the most intense luminescence was obtained for a 1 : 1 molar ratio of Yb3+ : Eu3+, resulting in a high quantum yield of 0.67 % at 2.1 W cm−2. The structure and energy transfer mechanism of the assemblies were fully characterized. This is the first example of an Eu3+‐based upconverting system composed of two discrete mononuclear lanthanide complexes present as co‐crystals in non‐deuterated solution. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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