Accessing decavanadate chemistry with tris(hydroxymethyl)aminomethane, and evaluation of methylene blue bleaching

Juliana M. Missina, Luiza B. P. Leme, Kahoana Postal, Francielli S. Santana, David L. Hughes, Eduardo L. De Sá, Ronny R. Ribeiro, Giovana G. Nunes

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Abstract

Two decavanadates (trisH)4[H2V10O28]·10H2O (1) and (trisH)6[V10O28] (2) have been synthesised from NaVO3 or V2O5 in an aqueous solution of tris(hydroxymethyl)aminomethane (tris). Bimetallic derivatives [Cu(OH2)5(trisH)]2[V10O28]·6H2O (3) and [Cu(OH2)3(2–amp)]2(trisH)2 [V10O28]·2H2O (4) were obtained by the addition of CuCl2 or CuCl2 / 2–amp (2–(aminomethyl)pyridine) to the route that gave 2. The products were characterised by single-crystal X-ray diffractometry, thermogravimetric analysis, FTIR, Raman and EPR spectroscopies. Moreover, 4 was effective in bleaching a methylene blue (MB) solution under natural light in acidic media by either degradation of the dye or precipitation of a MB-decavanadate salt depending on the experimental conditions.
Original languageEnglish
Article number114414
Number of pages12
JournalPolyhedron
Volume180
Early online date1 Feb 2020
DOIs
Publication statusPublished - 1 Apr 2020

Keywords

  • 2-(Aminomethyl)pyridine
  • ALKOXIDES
  • CLUSTER
  • COPPER(II) COMPLEXES
  • CRYSTAL-STRUCTURES
  • Copper(II)
  • Decavanadate
  • ION
  • Methylene blue
  • OXIDATION
  • POLYOXOVANADATE
  • RAMAN
  • Tris(hydroxymethyl)aminomethane
  • VANADIUM
  • VIBRATIONAL-SPECTRA

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