发光的异核稀土配合物装饰氧化石墨烯片

采用非共价键的方法制备一种新型的高荧光性能氧化石墨烯-异核稀土杂化材料。利用苯甲酸(BA)和菲咯啉(Phen)与Sm~(3+)和Gd~(3+)配位,并作用在氧化石墨烯片(GOSs)表面,制备了一种异核稀土配合物。所制备的产物通过傅里叶变换红外光谱、X射线衍射、扫描电子显微镜、荧光光谱仪、荧光寿命和热重分析来表征。该杂化材料具有强发光强度、长的寿命和良好的热稳定性。此外,Gd~(3+)对材料具有很强的敏化作用,同时Gd~(3+)在提高发光强度方面起着重要作用。氧化石墨烯的存在不会淬灭杂化材料的荧光性能。此外,还研究了具有不同物质的量之比的Sm~(3+)和Gd~(3+)的荧光特性。

Decoration of Graphene Oxide Sheets with Luminescent Heteronuclear Rare-Earth Complexes

A novel high luminescent performance of graphene oxide-rare earth hybrid material was prepared using a noncovalent approach. Herein, a heteronuclear rare earth complex were revealed in which the benzoic acid (BA) and 1,10-phenanthroline hydrate (Phen) coordinated with Sm³⁺ and Gd³⁺, which was used to functionalize graphene oxide sheets (GOSs). The as-prepared products were characterized via Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, fluorescence spectrometer, decay lifetime and thermogravimetric analysis. The hybrid materials exhibited strong luminescence intensity, long lifetime and good thermal stability. Besides, Gd³⁺ ions had a strong sensitizing effect on materials and played a significant role in improving the luminescence intensity. The presence of GOSs did not quench the fluorescence performance of hybrid materials. Moreover, their fluorescence properties of Sm³⁺ and Gd³⁺ with different molar ratios were also studied.