Currently, urea containing frameworks assumed to have a prominent role in the developing field of Y shapes anion detection such as TNP, TNT and their derivatives owing to their capability to act as double H-bond donors. Developing new and highly efficient sensors for detection of trace concentration of these explosives is remaining challenge. The immobilization of organic–functional struts within the pore wall of metal-organic frameworks (MOFs) is one of the new strategies to develop highly sensitive and selective receptors. Decoration of MOF skeleton with urea moiety can be helpful in effective recognizing of these specific guests for two reasons, (i) incorporation of urea strut in the framework prevents their inherent self-assembly and (ii) urea can form positive double hydrogen bond donation site which can act as a promising receptor for anionic moieties. A 3D, urea functionalized, TMU-18, has successfully synthesized as a chemosensor for selective detection by fluorescence signaling towards explosive nitroaromatics and carbonyl compounds. TMU-18 due to its special and porous structure and available functional group shows strong luminescence emission, and could be effectively used for sensitive detection of Trinitrophenol (TNP) with a 10 µM limit of detection (LOD).

目前，由于尿素骨架具有双重氢键供体的能力，因此被认为在Y形阴离子检测的发展领域中扮演着重要角色，例如TNP，TNT及其衍生物。开发新的高效传感器以检测这些炸药的痕量浓度仍然是挑战。将有机功能支撑物固定在金属有机框架（MOF）的孔壁中是开发高度敏感和选择性受体的新策略之一。用尿素部分修饰MOF骨架可以有效地识别这些特定的来宾，这有两个原因，（i）在框架中掺入尿素支撑物可防止其固有的自组装，和（ii）尿素可形成正的双氢键供体位点，其可充当阴离子部分的有希望的受体。一种3D，尿素官能化的TMU-18，已成功合成为化学传感器，可通过针对爆炸性硝基芳香族化合物和羰基化合物的荧光信号进行选择性检测。TMU-18由于其特殊的多孔结构和可用的官能团而显示出强大的发光发射，并可以有效地用于检测检测限（LOD）为10 µM的三硝基苯酚（TNP）。