Hydrothermal reactions: From the synthesis of ligand to new lanthanide 3D-coordination polymers

Fausthon Fred da Silva; Carlos Alberto Fernandes de Oliveira; Eduardo Henrique Lago Falcao; Claudia Cristina Gatto; Nivan Bezerra da Costa Jr; Ricardo Oliveira Freire; Jarosław Chojnacki; Severino Alves Junior

doi:10.1016/j.jssc.2013.09.004

Hydrothermal reactions: From the synthesis of ligand to new lanthanide 3D-coordination polymers

Abstract

The organic ligand 2,5-piperazinedione-1,4-diaceticacid (H2PDA) was synthesized under hydrothermal conditions starting from the iminodiacetic acid and catalyzed by oxalic acid. The X-ray powder diffraction data indicates that the compound crystallizes in the P21/c space group as reported in the literature. The ligand was also characterized by elemental analysis, magnetic nuclear resonance, infrared spectroscopy and thermogravimetric analysis. Two new coordination networks based on lanthanide ions were obtained with this ligand using hydrothermal reaction. In addition to single-crystal X-ray diffraction, the compounds were characterized by infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and elemental analysis. Single-crystal XRD showed that the compounds are isostructural, crystallizing in P21/n space group with chemical formula [Ln(PDA)1.5(H2O)](H2O)3 (Ln¼Gd3þ (1) and Eu3þ (2)). The luminescence properties of both compounds were studied. In the compound (1), a broad emission band was observed at 479nm, red shifted by 70nm in comparison of the free ligand.In (2), the typical f–f transition was observed with amaximum peak at 618 nm, related with the redemissionoftheeuropiumions.Computationalmethodswereperformedtosimulatethe crystal structureof (2). The theoretical calculationsoftheintensityparametersareingoodagreement with theexperimentalvalues.

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Authors (8)

Fausthon Fred da Silva
- Universidade Federal de Pernambuco Laboratório de Terras Raras, Departamento de Química Fundamental
Carlos Alberto Fernandes de Oliveira
- Universidade Federal de Pernambuco Laboratório de Síntese Inorgânica e Cristalografia, Instituto de Química
Eduardo Henrique Lago Falcao
- Universidade Federal de Pernambuco Laboratório de Terras Raras, Departamento de Química Fundamental
Claudia Cristina Gatto
- Universidade de Brasília Laboratório de Síntese Inorgânica e Cristalografia, Instituto de Química
Nivan Bezerra da Costa Jr
- Universidade Federal de Sergipe Pople Computational Chemistry Laboratory, Departamento de Química
Ricardo Oliveira Freire
- Universidade Federal de Sergipe Pople Computational Chemistry Laboratory, Departamento de Química
Jarosław Chojnacki prof. dr hab. inż.
Severino Alves Junior
- Universidade Federal de Pernambuco Laboratório de Terras Raras, Departamento de Química Fundamental

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: JOURNAL OF SOLID STATE CHEMISTRY no. 207, pages 132 - 139,
ISSN: 0022-4596
Language:: English
Publication year:: 2013
Bibliographic description:: Silva F., Oliveira C., Falcao E., Gatto C., Costa Jr N., Freire R., Chojnacki J., Junior S.: Hydrothermal reactions: From the synthesis of ligand to new lanthanide 3D-coordination polymers// JOURNAL OF SOLID STATE CHEMISTRY. -Vol. 207, (2013), s.132-139
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.jssc.2013.09.004
Verified by:: Gdańsk University of Technology