Heterobimetallic three-dimensional 4d-4f coordination polymers based on 5-methyl-1-(pyridyn-4-ylmethyl)-1H-1,2,3-triazole-3,4-dicarboxylate

• Published in: Journal of solid state chemistry 2022-06, Vol.310, p.123027, Article 123027
• Main Authors: Narea, Pilar, Hernández, Benjamín, Cisterna, Jonathan, Cárdenas, Alejandro, Llanos, Jaime, Amo-Ochoa, Pilar, Zamora, Félix, Priego, José Luis, Cortijo, Miguel, Delgado, Gerzon E., Brito, Iván
• Format: Article
• Language: English
• Subjects: Heterobimetallic compounds; Lanthanide-transition metal compounds; Magnetic properties; Metal organic framework; Solid-stateluminescense
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2022.123027

Three novel 4f-4d heterometallic coordination polymers (CPs), [Ln(H2O)3CdL2(NO3)]·6H2O (L ​= ​ethyl 5-methyl-1-(pyridin-4-ylmethyl)-1H-1,2,3-triazole-3,4-dicarboxylate; Ln ​= ​Eu, Gd, Tb 1, 2 and 3, respectively) have been successfully synthesized by hydrothermal treatment and slow cooling-down crystallization. These CPs have been structurally characterized by single-crystal X-ray diffraction. 1–3 are isostructural and consist of a three-dimensional network showing channels. The networks are reinforced via hydrogen bonds and π-π stacking interactions. The crystal topology analysis shows an infinite 2D layer topology with net symbol {4,4} (sql). The magnetic behavior of these compounds is explained by the expected contribution of almost isolated Ln (III) ions. An energy gap of 375 ​cm−1 between the 7F0 ground state and the first excited state of compound 1 has been deduced from magnetic data showing an excellent agreement with the spectroscopic data. [Display omitted] •3D molecular and crystal structure with tri-dimensional features was confirmed by single crystal X-ray diffraction and discussed.•Topologies Analyses were performed and discussed.•Thermal, luminescent, and magnetic properties reveal that this type of compound is a good candidate for solid-state luminescent material.