Wang Zhong-Jie, Qin Ling, Chen Jin-Xi, Zheng He-Gen
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, P. R. China.
School of Chemistry and Chemical Engineering, Southeast University , Nanjing 211189, P. R. China.
Inorg Chem. 2016 Nov 7;55(21):10999-11005. doi: 10.1021/acs.inorgchem.6b01521. Epub 2016 Oct 21.
Two luminescent Cd(II) metal-organic frameworks (MOFs) were prepared from electron-rich π-conjugated fluorescent ligands. They are isostructural with sql nets. Their strong luminescences can be quenched by a series of nitroaromatic explosives. Notably, MOF 1 shows highly selective and sensitive detection of 4-nitrophenol (4-NP), while MOF 2 exhibits good responses toward picric acid (PA) compared with other nitroaromatic explosives. This different order of quenching efficiency is because there are H-bonding interactions between MOF 1 and 4-NP, while MOF 2 lacks these H-bonding interactions. MOF 1 displays highly selective and sensitive detection of 4-NP with the high quenching constant (6.74× 10 M) and low detection limit (34.48 ppb), which is better than those of known MOFs. MOF 1 and MOF 2 have highly sensitive and selective detection of 4-NP and PA in the practical application, respectively.
通过富电子的π共轭荧光配体制备了两种发光的镉（II）金属有机框架（MOF）。它们与sql网络同构。它们的强发光可以被一系列硝基芳香族炸药淬灭。值得注意的是，MOF 1对4-硝基苯酚（4-NP）表现出高度选择性和灵敏的检测，而与其他硝基芳香族炸药相比，MOF 2对苦味酸（PA）表现出良好的响应。这种淬灭效率的不同顺序是因为MOF 1和4-NP之间存在氢键相互作用，而MOF 2缺乏这些氢键相互作用。MOF 1对4-NP表现出高度选择性和灵敏的检测，具有高淬灭常数（6.74×10 M）和低检测限（34.48 ppb），优于已知的MOF。在实际应用中，MOF 1和MOF 2分别对4-NP和PA具有高度灵敏和选择性的检测。
