Lanthanide(III)-Modified MIL-125(Ti-Ln) (Ln = Eu or Tb) for the Detection of Cu(II) and Fe(III) Ions

Abstract

Heavy metal pollution has become a worldwide concern of environmental problems. The replacement of partial Ti­(IV) centers with Eu­(III) or Tb­(III) yielded a couple of lanthanide­(III)-modified MIL-125­(Ti) materials, MIL-125­(Ti-Ln) [Ln = Eu­(III) or Tb­(III)]. MIL-125­(Ti-Ln) series were explored as fluorescent probes toward a series of metal ions based on the fluorescence properties of lanthanide­(III) centers. Heterometallic MIL-125­(Ti-Ln) series exhibited highly selective fluorescence quenching responses toward Cu­(II) and Fe­(III) ions. Moreover, the possible mechanism of fluorescence quenching was also studied.

Heterometallic MIL-125(Ti–Al) frameworks for electrochemical determination of ascorbic acid, dopamine and uric acid

“…S1, ESI †). 44,45 A series of MIL-125(Ti-Al)-xNH 2 materials were synthesized through the addition of NH 2 -H 2 BDC instead of some of H 2 BDC as the secondary organic linker based on an improved solvothermal process. Correspondingly, the as-synthesized MOF materials were named MIL-125(Ti-Al)-xNH 2 (x = 0%, 25%, 50%, 75%, and 100%), according to the feeding ratio of NH 2 -H 2 BDC.…”