Cinnamic acid derivative rare-earth dinuclear complexes and one-dimensional architectures: synthesis, characterization and magnetic properties.

Ouafa Khalfaoui, Adel Beghidja, Jérôme Long, Ahlem Boussadia, Chahrazed Beghidja, Yannick Guari, Joulia Larionova

Dalton transactions (Cambridge, England : 2003) 2017 Mar 21

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Discrete and extended architectures based on the association of lanthanide ions with two derivatives of cinnamic acid (2-methoxycinnamic acid and 3-methoxycinnamic acid) have been synthesized and characterized by IR spectroscopy, elemental analyses, X-ray diffraction and magnetic measurements. The use of the 2-methoxycinnamic ligand enables the synthesis of a series of dinuclear complexes (Ce3+ (1), Nd3+ (2), Gd3+ (3), Dy3+ (4)), while the presence of 3-methoxycinnamic acid induces the formation of one-dimensional coordination polymers (Ce3+ (5), Nd3+ (6), Dy3+ (7)). Investigations of the magnetic properties of the complexes reveal that they all exhibit field-induced slow relaxation of the magnetisation, mainly induced by Raman and direct relaxation processes.

Citation

Ouafa Khalfaoui, Adel Beghidja, Jérôme Long, Ahlem Boussadia, Chahrazed Beghidja, Yannick Guari, Joulia Larionova. Cinnamic acid derivative rare-earth dinuclear complexes and one-dimensional architectures: synthesis, characterization and magnetic properties. Dalton transactions (Cambridge, England : 2003). 2017 Mar 21;46(12):3943-3952