A water-stable La-MOF with high fluorescence sensing and supercapacitive performances. Issue 15 (3rd July 2019)

• Record Type: Journal Article
• Authors: Liu, Qian-Qian; Zhang, Shi-Hui; Yang, Jing; Yue, Ke-Fen
• Is Part Of: Analyst. Volume 144:Issue 15(2019)
• Page Start: 4534
• Page End: 4544
• Publication Date: 2019-07-03
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/c9an00858f
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : La-MOF shows excellent chemical stability and high fluorescence sensing.La-MOF electrode exhibits high specific capacity and good cycling stability. Abstract : A 3D lanthanide coordination polymer {[La(SIP)(H2 O)3 ]·H2 O} n (La-MOF ) was synthesized successfully by the solvothermal reaction of La(NO3 )3 ·6H2 O and 5-sulfoisophthalic acid monosodium salt (NaH2 SIP). In particular, two oxygen atoms of sulfate participate in the coordination, which is unusual in all the complexes.La-MOF was characterized by single-crystal X-ray diffraction, IR spectroscopy, powder X-ray diffraction, thermal-gravimetric analysis, and X-ray photoelectron spectroscopy.La-MOF shows excellent water stability and chemical stability in a broad pH range from 2 to 13. Moreover, the fluorescence and sensing properties ofLa-MOF were invsetigated in detail via its titration and cycling processes, revealing its highly efficient and selective quenching responses and good recyclability for the detection of Fe 3+, Cr2 O7 2− and CrO4 2− ions. In addition, La-MOF possesses an outstanding specific capacitance of 213 F g −1 at 0.5 A g −1 . It still retains 92% of the original capacitance after 2000 cycles, exhibiting remarkable long-term cycling stability and reversibility; therefore, the electrode material based onLa-MOF is a competitive and promising candidate for application in supercapacitors.