Effect of N,N′-dimethylformamide solvent on structure and thermal properties of lanthanide(III) complexes with flexible biphenyl-4,4′-dioxydiacetic acid
Authors:
- Halina Głuchowska,
- Renata Łyszczek,
- Anna Maria Jusza,
- Ryszard Piramidowicz
Abstract
The N,N′-dimethylformamide (DMF) was used in the microwave-assisted (MW) solvothermal method for the preparation of lanthanide(III) complexes with biphenyl-4,4′-dioxydiacetic acid (H2L) of the formula Ln2L3·xDMF⋅yH2O where Ln = lanthanide(III) ions from La(III) to Lu(III) with the Pm(III) exception x = 1.5–3; y = 2 for Yb and Lu or 0 for the remaining complexes and L = C14H12O2(COO) 2−2. The obtained complexes were characterized by the elemental analysis, infrared spectroscopy (ATR-FTIR), X-ray diffraction patterns and different methods (TG-DSC and TG-FTIR) of thermal analysis. Crystalline complexes contain N,N′-dimethylformamide molecules in their structures. Additionally, water molecules are present in the structures of Yb(III) and Lu(III) complexes. Coordination of lanthanide ions occurs through carboxylate oxygen atoms from the biphenyl-4,4′-dioxydiacetate ligand and most probably carbonyl oxygen atom from N,N′-dimethylformamide. The investigated compounds exhibit different thermal stability, and removal of solvent molecules takes place in a more complex way in the group of heavy lanthanide complexes. Their desolvated forms are an unstable [except Yb(Lu)2L3 compounds], and their further heating leads to the formation of suitable lanthanide oxides (air atmosphere). Thermal stability of the investigated compounds is higher in nitrogen atmosphere. The TG-FTIR methods allowed to propose way of thermal decomposition of investigated compounds through identification of volatile products such as: DMF, H2O, CO2, CO and CH4 evolved during heating of complexes. The luminescent properties of terbium(III) and europium(III) complexes were also investigated.
- Record ID
- WUT8c92dcfa73c048e999b7fb5f09f560ef
- Author
- Journal series
- Journal of Thermal Analysis and Calorimetry, ISSN 1388-6150, e-ISSN 1588-2926
- Issue year
- 2022
- Vol
- 147
- No
- 2
- Pages
- 1187–1200
- ASJC Classification
- ;
- DOI
- DOI:10.1007/s10973-020-10435-1 Opening in a new tab
- URL
- https://link.springer.com/article/10.1007/s10973-020-10435-1 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 100
- Score source
- journalList
- Score
- = 100.0, 14-05-2022, ArticleFromJournal
- Publication indicators
- = 3; = 1; = 2; : 2018 = 1.063; : 2020 (2 years) = 4.626 - 2020 (5 years) =3.458
- Citation count
- 2
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUT8c92dcfa73c048e999b7fb5f09f560ef/
- URN
urn:pw-repo:WUT8c92dcfa73c048e999b7fb5f09f560ef
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.