Publications by authors named "Ruben Turo-Cortes"
Article Synopsis
- The integration of spin crossover (SCO) properties in 3D Hofmann-type coordination polymers (HCPs) offers potential for creating advanced multifunctional materials.
- Researchers explored alternative building blocks using 3-substituted pyridine and pyrimidine ligands, successfully synthesizing multiple new compounds.
- Structural studies reveal diverse SCO behaviors, with some compounds showing distinct thermal and light-induced SCO properties, highlighting the relationship between structural characteristics and magnetic behavior.
We report herein the synthesis and characterization of two unprecedented isomorphous spin-crossover two-dimensional coordination polymers of the Hofmann-type formulated {Fe(Hdpyan)(μ-[M(CN)])}, with M = Pd, Pt and Hdpyan is the partially protonated form of 2,5-(dipyridin-4-yl)aniline (dpyan). The Fe is axially coordinated by the pyridine ring attached to the 2-position of the aniline ring, while it is equatorially surrounded by four [M(CN)] planar groups acting as μ-bidentate ligands defining layers, which stack parallel to each other. The other pyridine group of Hdpyan, being protonated, remains peripheral but involved in a strong [M-C≡N···Hpy] hydrogen bond between alternate layers.
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- The study focuses on controlling spin-crossover (SCO) behavior through the absorption and release of specific guest molecules, highlighting its potential for molecular sensing applications.
- Researchers experimented with Hofmann clathrates by swapping the ligand 4-phenylpyridine for 2,4-bipyridine, which introduced a noncoordinated nitrogen atom in the structure.
- The findings show that even minor changes in chemical composition can significantly alter the compounds’ ability to absorb small molecules like water and methanol, as well as their impact on the SCO properties.
Spin crossover (SCO) compounds are very attractive types of switchable materials due to their potential applications in memory devices, actuators or chemical sensors. Rational chemical tailoring of these switchable compounds is key for achieving new functionalities in synergy with the spin state change. However, the lack of precise structural information required to understand the chemical principles that control the SCO response with external stimuli may eventually hinder further development of spin switching-based applications.
View Article and Find Full Text PDFAiming at investigating the suitability of Hofmann-type two-dimensional (2D) coordination polymers {Fe(L)[M(CN)]} to be processed as single monolayers and probed as spin crossover (SCO) junctions in spintronic devices, the synthesis and characterization of the M derivatives (M = Pd and Pt) with sulfur-rich axial ligands (L = 4-methyl- and 4-ethyl-disulfanylpyridine) have been conducted. The thermal dependence of the magnetic and calorimetric properties confirmed the occurrence of strong cooperative SCO behavior in the temperature interval of 100-225 K, featuring hysteresis loops 44 and 32.5 K/21 K wide for Pt-methyl and Pt/Pd-ethyl derivatives, while the Pd-methyl derivative undergoes a much less cooperative multistep SCO.
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