Wang Qianwei, Wu Qi, Guo Jinhu, Yang Xinyu, Fang Mengxuan, Wang Jiaoying, Tai Minghui, Cheng Yichong, Jin Dalai, Wang Longcheng
School of Materials Science and Engineering, Zhejiang Sci-Tech University, Xiasha Town, Hangzhou, 310018, PR China.
J Fluoresc. 2024 Sep 25. doi: 10.1007/s10895-024-03927-y.
The hydrothermal method was employed to synthesize a novel bi-ligands LnMOF: Ln(cpioa)phen. The secondary ligand 1, 10-phen serves as a bridging agent to further facilitate energy transfer between Ln ions and the primary ligand Hcpioa. A comparison between Ln(cpioa) MOFs (Ln: Tb, Eu) and Ln(cpioa)phen MOFs (Ln: Tb, Eu) reveals that addition of the secondary ligand significantly improves the emission intensity by as high as almost 34 times. After detailed structural study, it is found that different Ln ions have the similar coordination in the Ln(cpioa)phen MOF. In addition, the chromaticity of Ln(cpioa)phen MOFs can be easily tuned by the amounts of doping Ln ions. LaTbEu(cpioa)phen MOF has a white emission with a CIE coordinate of (0.323, 0.343). Characterizations of corresponding LED devices show that device based on Ln(cpioa)phen MOF has better photoluminescence performances, which indicates that Ln(cpioa)phen MOF has great potential of for WLED applications.
采用水热法合成了一种新型双配体LnMOF：Ln(cpioa)phen。第二配体1,10 - phen作为桥联剂，进一步促进Ln离子与第一配体Hcpioa之间的能量转移。Ln(cpioa)MOFs（Ln：Tb，Eu）与Ln(cpioa)phen MOFs（Ln：Tb，Eu）的比较表明，添加第二配体可使发射强度显著提高，高达近34倍。经过详细的结构研究发现，不同的Ln离子在Ln(cpioa)phen MOF中具有相似的配位情况。此外，通过掺杂Ln离子的量可以很容易地调节Ln(cpioa)phen MOFs的色度。LaTbEu(cpioa)phen MOF发出白色光，CIE坐标为(0.323, 0.343)。相应LED器件的表征表明，基于Ln(cpioa)phen MOF的器件具有更好的光致发光性能，这表明Ln(cpioa)phen MOF在白光发光二极管应用方面具有巨大潜力。
