Cinnamal sensing and luminescence color tuning in a series of rare-earth metal−organic frameworks with trans-1,4-cyclohexanedicarboxylate

Pavel A. Demakov, Alena A. Vasileva, Sergey S. Volynkin, Alexey A. Ryadun, Denis G. Samsonenko, Vladimir P. Fedin, Danil N. Dybtsev

Research output: Contribution to journalArticlepeer-review

Abstract

Three isostructural metal–organic frameworks ([Ln2(phen)2(NO3)2(chdc)2]⋅2DMF (Ln3+ = Y3+ for 1, Eu3+ for 2 or Tb3+ for 3; phen = 1,10-phenanthroline; H2chdc = trans-1,4-cyclohexanedicar-boxylic acid) were synthesized and characterized. The compounds are based on a binuclear block {M2(phen)2(NO3)2(OOCR)4} assembled into a two-dime nsional square-grid network containing tetragonal channels with 26% total solvent-accessible volume. Yttrium (1)-, europium (2)-and terbium (3)-based structures emit in the blue, red and green regions, respectively, representing the basic colors of the standard RGB matrix. A doping of Eu3+ and/or Tb3+ centers into the Y3+-based phase led to mixed-metal compositions with tunable emission color and high quantum yields (QY) up to 84%. The bright luminescence of a suspension of microcrystalline 3 in DMF (QY = 78%) is effectively quenched by diluted cinnamaldehyde (cinnamal) solutions at millimolar concentrations, suggesting a convenient and analytically viable sensing method for this important chemical.

Original languageEnglish
Article number5145
JournalMolecules
Volume26
Issue number17
DOIs
Publication statusPublished - 1 Sep 2021

Keywords

  • Coordination polymers
  • Light-emitting devices
  • Luminescence
  • Luminescent detection
  • Metal–organic frameworks
  • Rare-earth elements
  • Sensing
  • X-ray diffraction analysis

OECD FOS+WOS

  • 1.04 CHEMICAL SCIENCES

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