Metal–organic frameworks of lanthanide iminodiacetates and tartrates: Synthesis, structural characterization and luminescence properties — Commemorating the 100th anniversary of the birth of Academician Guangxian Xu

Melissa Fairley, M. M.Varuni S. Livera, Wanmin Chen, Jorge H.S.K. Monteiro, Adam Schmitt, Ana de Bettencourt-Dias, Sue Roberts, Zhiping Zheng

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Two series of lanthanide-containing metal–organic frameworks (Ln-MOFs) of the general formula {[Ln(HIDA)2H2O]ClO4·H2O}n (Ln = La (1), Nd (2), Eu (3), Gd (4), Tb (5), Eu:Tb (6); H2IDA = iminodiacetic acid) and [Ln(TT) (HTT) (H2O)3]n (Ln = Eu (7), Gd (8), Tb (9), Dy (10), and Eu:Tb (11); H2TT = tartaric acid) were synthesized by reacting Ln(ClO4)3 with iminodiacetic acid and L-tartaric acid, respectively. All compounds were structurally characterized by single-crystal X-ray diffraction. Elemental analyses are consistent with the corresponding crystallographically generated formulas. Moreover, the luminescence properties of both the single and mixed-lanthanide complexes were studied. Near infrared, red, and green emissions that are characteristic of Nd(III), Eu(III), and Tb(III) are observed for 2, 3/7, and 5/9, respectively. For the two mixed-lanthanide complex systems 6 and 11, depending on the relative amount of Eu(III) and Tb(III), the color of emission can be fine-tuned. It is found that a small amount of Eu(III) is adequate for the observation of the most intense transition of Eu(III). This is believed to be a result of energy transfer from Tb(III) to Eu(III) within the same complex - a conclusion supported by the significantly shortened lifetime of Tb(III) and the accompanying enhanced lifetime of Eu(III) in the mixed-lanthanide complex with respect to the corresponding values for the pure Tb(III) and Eu(III) complexes with the same ligand.

Original languageEnglish (US)
Pages (from-to)487-494
Number of pages8
JournalJournal of Rare Earths
Volume39
Issue number5
DOIs
StatePublished - May 2021

Keywords

  • Lanthanides
  • Luminescence
  • Metal–organic frameworks
  • Rare earths

ASJC Scopus subject areas

  • Chemistry(all)
  • Geochemistry and Petrology

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