Turn-on and Ratiometric Luminescent Sensing of Hydrogen Sulfide Based on Metal-Organic Frameworks

Xin Zhang; Quan Hu; Tifeng Xia; Jun Zhang; Yu Yang; Yuanjing Cui; Banglin Chen; Guodong Qian

doi:10.1021/acsami.6b12118

Turn-on and Ratiometric Luminescent Sensing of Hydrogen Sulfide Based on Metal-Organic Frameworks

ACS Appl Mater Interfaces. 2016 Nov 30;8(47):32259-32265. doi: 10.1021/acsami.6b12118. Epub 2016 Nov 16.

Authors

Xin Zhang¹, Quan Hu², Tifeng Xia¹, Jun Zhang¹, Yu Yang¹, Yuanjing Cui¹, Banglin Chen^{1

3}, Guodong Qian¹

Affiliations

¹ 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.
² Department of Pharmacy, School of Medicine, Hangzhou Normal University , Hangzhou 310036, China.
³ Department of Chemistry, University of Texas at San Antonio , San Antonio, Texas 78249-0698, United States.

PMID: 27933828
DOI: 10.1021/acsami.6b12118

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)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.

Keywords: fluorescent probes; hydrogen sulfide; metal−organic frameworks; ratiometric sensing; turn-on.