硫化氢
金属有机骨架
材料科学
发光
硫化物
转身(生物化学)
组合化学
金属
光化学
纳米技术
无机化学
硫黄
光电子学
化学
有机化学
冶金
吸附
生物化学
作者
Xin Zhang,Quan Hu,Tifeng Xia,Jun Zhang,Yu Yang,Yuanjing Cui,Banglin Chen,Guodong Qian
标识
DOI:10.1021/acsami.6b12118
摘要
The sensing of hydrogen sulfide (H2S) has become a long-time challenging task. In this work, we developed a general strategy for sensing of H2S utilizing postsynthetic modification of a nano metal–organic frameworks (MOF) UiO-66-(COOH)2 with Eu3+ and Cu2+ ions. The nano MOF Eu3+/Cu2+@UiO-66-(COOH)2 displays the characteristic Eu3+ sharp emissions and the broad ligand-centered (LC) emission simultaneously. Because H2S can strongly increase the fluorescence of Eu3+ and quench the broad LC emission through its superior affinity for Cu2+ ions, the MOF Eu3+/Cu2+@UiO-66-(COOH)2 exhibits highly sensitive turn-on sensing of H2S over other environmentally and biologically relevant species under physiological conditions. Furthermore, this approach for fluorescent turn-on sensing of H2S is expected to extend to other water-stable MOFs containing uncoordinated −COOH.
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