| Institution: | 1. Department of Physics, College of Sciences, Shanghai University, 200444 Shanghai, China
Department of Chemistry, College of Sciences, Shanghai University, 200444 Shanghai, China;2. School of Materials Science and Engineering, Shanghai University, 200444 Shanghai, China;3. Department of Chemistry and Biochemistry and Centre for NanoScience Research, Concordia University, H4B 1R6 Montreal, QC, Canada;4. Department of Chemistry, College of Sciences, Shanghai University, 200444 Shanghai, China;5. Department of Physics, College of Sciences, Shanghai University, 200444 Shanghai, China |
| Abstract: | Lanthanide-doped metal–organic frameworks (Ln-MOFs) have versatile luminescence properties, however it is challenging to achieve lanthanide-based upconversion luminescence in these materials. Here, 1,3,5-benzenetricarboxylic acid (BTC) and trivalent Yb3+ ions were used to generate crystalline Yb-BTC MOF 1D-microrods with upconversion luminescence under near infrared excitation via cooperative luminescence. Subsequently, the Yb-BTC MOFs were doped with a variety of different lanthanides to evaluate the potential for Yb3+-based upconversion and energy transfer. Yb-BTC MOFs doped with Er3+, Ho3+, Tb3+, and Eu3+ ions exhibit both the cooperative luminescence from Yb3+ and the characteristic emission bands of these ions under 980 nm irradiation. In contrast, only the 497 nm upconversion emission band from Yb3+ is observed in the MOFs doped with Tm3+, Pr3+, Sm3+, and Dy3+. The effects of different dopants on the efficiency of cooperative luminescence were established and will provide guidance for the exploitation of Ln-MOFs exhibiting upconversion. |
