Wu Jing-Xing, Yan Bing
Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China.
Dalton Trans. 2016 Nov 22;45(46):18585-18590. doi: 10.1039/c6dt03738k.
A class of hybrid materials based on indium 2,2'-bipyridine-5,5'-dicarboxylate metal-organic frameworks, In(OH)bpydc, was synthesized by postsynthetic introduction with lanthanide ions (Eu, Tb and Sm). The structure, thermal stability, morphology and more detailed information about these materials were characterized by XRD, DSC, BET, FTIR, SEM and so forth. The further study of luminescent properties in detail showed that these compounds possess characteristic emission, and the In-MOF-Eu maintains different colors of light from blue-green to red under different excitation wavelengths (excited at 400 nm to 320 nm), which includes the near-white light region (the color coordinates are X = 0.34, Y = 0.36). It is a remarkable fact that the trend of ligand-central emission is opposite to that of the characteristic emission of Eu. Moreover, a kind of thin film and assembled white light near-UV LED based on the optically lanthanide-functionalized MOFs was prepared in order to extend their potential applications; both of them lead to desirable white light (X = 0.34, Y = 0.36; X = 0.35, Y = 0.37). In addition, the matrix does not affect the white luminescence.
通过镧系离子（铕、铽和钐）的后合成引入，合成了一类基于铟2,2'-联吡啶-5,5'-二羧酸金属有机框架In(OH)bpydc的杂化材料。通过XRD、DSC、BET、FTIR、SEM等对这些材料的结构、热稳定性、形态及更多详细信息进行了表征。对发光性能的进一步详细研究表明，这些化合物具有特征发射，并且In-MOF-Eu在不同激发波长（400nm至320nm激发）下保持从蓝绿色到红色的不同颜色光，其中包括近白光区域（色坐标为X = 0.34，Y = 0.36）。一个显著的事实是，配体中心发射的趋势与铕的特征发射趋势相反。此外，制备了一种基于光学镧系功能化MOF的薄膜和组装近紫外白光发光二极管，以扩展其潜在应用；两者都产生了理想的白光（X = 0.34，Y = 0.36；X = 0.35，Y = 0.37）。此外，基质不影响白色发光。
