铀元素作为一种具有微弱放射性的核素，在能源、武器等领域具有十分重要和特殊的地位。但是，贫铀材料的再利用是一个长期以来难以解决的问题。因此，开发新型的含铀材料具有十分重要的意义。在这个工作中，我们首次利用以铀金属为结点的高稳定性荧光MOFs材料实现对水体中Fe元素的荧光检测。由于材料具有较高的量子产率，因此其检测下限极低，达到了6.3 ppb。与同类型的MOFs荧光材料相比显示出突出的优越性。
Fig.1 a) Luminescence intensity of 1 dispeared into different meatl salt solutions (excited at 364 nm, monitered at 521 nm). b) Correspongding luminescence photograph of 1 immersed in these metal salt solutions (excited at 365 nm).
Fig. 2 Crystal structure of 1, hydrogen atoms are omitted for clarity: (a) Coordination environment of U1. (b) Asymmetric unit of UO2(C8H3O6N)·DMF. (c) The 1D chain of compound 1 composed of 5-Nitroisophthalic acid linked asymmetric units. (d) The packing of 1D chains in 1. (H atoms are omitted for clarity) Atom colours: U = green, O = red, C = black, N = blue.