Abstract Luminescent hybrid materials were prepared by covalently functionalizing nanodiamonds (NDs) with rare earth (RE) complexes. Pyromellitic acid (PMA), as the organic sensitizer, was grafted onto amino-terminated NDs to chelate lanthanide ions (Eu3+ and Tb3+). The emission colors of the hybrid composite of ND-PMA-EuxTby can be tuned from red to orange, yellow and green by adjusting the molar ratio of Eu3+ to Tb3+. Moreover, the luminescence of the hybrid composites exhibits remarkable photostability under ultraviolet irradiation for 60 h. As a proof-of-concept experiment, the as-synthesized ND-PMA-Eu and ND-PMA-Tb were employed as the phosphors for red and green light-emitting-diode (LED) devices with ultraviolet (UV) chips. Therefore, the nanodiamond-based luminescent hybrid material may find potential application in optical device.

中文翻译：

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基于纳米金刚石的发光杂化材料

摘要 通过将纳米金刚石 (ND) 与稀土 (RE) 配合物共价功能化，制备了发光杂化材料。均苯四酸 (PMA) 作为有机敏化剂，接枝到氨基末端的 NDs 上以螯合镧系元素离子（Eu3+ 和 Tb3+）。通过调节 Eu3+ 与 Tb3+ 的摩尔比，ND-PMA-EuxTby 混合复合材料的发光颜色可以从红色变为橙色、黄色和绿色。此外，杂化复合材料的发光在紫外线照射下 60 小时表现出显着的光稳定性。作为概念验证实验，合成的 ND-PMA-Eu 和 ND-PMA-Tb 被用作具有紫外线 (UV) 芯片的红色和绿色发光二极管 (LED) 器件的荧光粉。因此，纳米金刚石基发光杂化材料可能会在光学器件中找到潜在的应用。