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New lanthanide–CB[6] coordination compounds: relationships between the crystal structure and luminescent properties
Abstract
The reaction between cucurbit[6]uril (CB[6]) and lanthanide chlorides (Eu, Sm, Tb and Tm) in acidic aqueous media led to four new structures. The compounds obtained are isostructural with general formula [Ln2(H2O)12(H2O@CB[6])]Cl6(H2O)4 (Ln = Eu3+ (1), Sm3+ (2), Tb3+ (3) and Tm3+ (4)) and crystallize in the P21/c space group. For the complexes with Eu3+, Sm3+ and Tb3+, the luminescent properties in the solid state and aqueous media were explored and all spectroscopic observations are in excellent agreement with the single crystal structure data. The excitation and emission spectra show the typical f–f transitions characteristic of the trivalent lanthanide ions. The transitions 7FJ ← 5D1 (J = 0,1,2) in the europium compound and 7FJ ← 5D4 (J = 0,1,2) in the terbium compound, not yet reported in lanthanide–CB[n] compounds, were also observed
Authors (6)
-
Fausthon F. da Silva
- . .
-
Carlos A. F. de Oliveira
- . .
-
Eduardo H. L. Falcão
- . .
-
Jorge L. Neves
- . .
-
Severino Alves Junior
- Universidade Federal de Pernambuco Departamento de Química Fundamental
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
DALTON TRANSACTIONS
no. 43,
pages 5435 - 5442,
ISSN: 1477-9226 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Da Silva F., De Oliveira C., Falcão E., Chojnacki J., Neves J., Alves Junior S.: New lanthanide–CB[6] coordination compounds: relationships between the crystal structure and luminescent properties// DALTON TRANSACTIONS. -Vol. 43, (2014), s.5435-5442
- Verified by:
- Gdańsk University of Technology
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