Fu Hao, Zhong Ziyun, Liang Zhong, Jiang Yong, Qiu Di, Zhang Mengzhen, Jin Mengdie, Zeng Zhichao, Yin Leilei, Du Yaping
Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Haihe Laboratory of Sustainable Chemical Transformations, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China.
Tianjin Normal University, Tianjin 300387, P. R. China.
ACS Nano. 2025 Jan 21;19(2):2213-2227. doi: 10.1021/acsnano.4c11368. Epub 2025 Jan 9.
The regulation of the f-f transition is the basis of utilizing the abundant optical properties of lanthanide (Ln), of which the key is to modulate the local environment of Ln ions. Here, we constructed Eu(III)-based unit-cell-sized ultrathin nanowires (UCNWs) with red luminescence and polymer-like behavior, which appears as an ideal carrier for regulating f-f transition. The f-f transition of Eu(III) in UCNWs could be precisely regulated through various ligands. It is the unusual surface states that make the UCNWs exhibit greater electric dipole strength and better sensitivity to various ligands compared with the carefully constructed ultrathin nanosheets. In addition, the possibility of regulating f-f transition in UCNWs through energy transfer and a high entropy strategy was also revealed. Finally, a temperature-dependent universal fluorescent ink was prepared based on UCNWs, which provides ideas for intelligent flexible fluorescent materials.
