title: Turn-on and Ratiometric Luminescent Sensing of Hydrogen Sulfide Based on Metal-Organic Frameworks.
abstract: 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)2with Eu3+and Cu2+ions. The nano MOF Eu3+/Cu2+@UiO-66-(COOH)2displays 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)2exhibits 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.
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Pharmacy, School of Medicine, Hangzhou Normal University , Hangzhou 310036, China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Hu
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Tifeng
authors.initials: T
authors.lastname: Xia
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Yuanjing
authors.initials: Y
authors.lastname: Cui
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.|Department of Chemistry, University of Texas at San Antonio , San Antonio, Texas 78249-0698, United States.
authors.forename: Banglin
authors.initials: B
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Guodong
authors.initials: G
authors.lastname: Qian
keywords: fluorescent probes; hydrogen sulfide; metal−organic frameworks; ratiometric sensing; turn-on