Ag+-induced photoluminescence enhancement in lanthanide post-functionalized MOFs and Ag+ sensing. Issue 13 (20th March 2017)

• Record Type: Journal Article
• Authors: Sun, Nana; Yan, Bing
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 13(2017)
• Page Start: 9174
• Page End: 9180
• Publication Date: 2017-03-20
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp00631d
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Single-phase white-light emitters based on 4d–4f heterometallic co-doped MOFs can be realized, and Sm-MIL-61 shows more highly sensitive and selective sensing towards Ag + . Abstract : The robust gallium carboxylate Ga(OH)(btec)·0.5H2 O (MIL-61) is selected as a parent MOF to prepare Ln-MIL-61 by PSM. This work investigates the luminescence of Ln-doped MIL-61 (Ln = Eu 3+, Tb 3+, Sm 3+, Dy 3+ ) in the visible light region. Upon 314 nm excitation, the emission spectra of Eu-MIL-61, Tb-MIL-61 and Eu/Tb-MIL-61 all exhibit their respective strong sharp emission bands. However, Sm-MIL-61 and Dy-MIL-61 show very similar emission to MIL-61 and almost no luminescence of Sm 3+ and Dy 3+ . In this work, the weak fluorescence of Sm 3+ or Dy 3+ doped MIL-61 is effectively sensitized by Ag + . Besides, single-phase white-light emitters based on the resulting 4d–4f heterometallic co-doped MOFs can be realized. Furthermore, Sm-MIL-61 shows more highly sensitive and selective sensing towards Ag +, and is a promising optical sensor for Ag + detection in a few daily water samples.