Multifunctional properties existing in Ln–nitronyl nitroxide single-chain magnets

Two Ln–radical one-dimensional chains have been isolated via a quinoline nitronyl nitroxide radical and the magnetic properties, thermodynamics and optical behavior of compounds were observed, exhibiting polyfunctionality of the 2p–4f system.

Sonocrystallization as an Efficient Way to Control Size, Morphology and Purity of Coordination Compounds Microcrystallites: Application to Single-Chain Magnets

<p> Size, morphology and purity control of coordination compounds powders is a key stage for their conversion into materials and devices. In particular, surface science techniques require highly pure bulk materials with a narrow crystallite‑size distribution together with straightforward, scalable and reproducible crystallization procedures. In this work we demonstrate how sonocrystallization, <i>i.e.</i> application of ultrasounds during the crystallization process, can afford, very quickly, powders made of crystallites with controlled size, morphology and purity. We show that this process drastically diminishes the crystallite‑size distribution (low Polydispersity Indexes, PDI) and crystallite aspect ratio. By comparing sonicated samples with various silent crystallization conditions, we unambiguously show that the improvement of the crystallite morphologies and size‑distribution is not due to any thermal effect but to the sonication of the crystallizing media. The application of sonocrystallization on crystallization batches of Single‑Chain Magnets (SCM) maintains SCMs chemical integrity together with their original magnetic behavior. Moreover, luminescent measurements show that sonocrystallization induces an efficient micromixing that drastically enhances the purity of the SCMs powders. We thus propose that sonocrystallization, which is already used on organic or MOF compounds, can be applied to (magnetic) coordination compounds to readily afford bulk powders for characterization or shaping techniques that require pure, morphology‑ and crystallite‑size‑controlled powder samples.</p> <p><br> </p>

Sonocrystallization as an Efficient Way to Control Size, Morphology and Purity of Coordination Compounds Microcrystallites: Application to Single-Chain Magnets

<p> Size, morphology and purity control of coordination compounds powders is a key stage for their conversion into materials and devices. In particular, surface science techniques require highly pure bulk materials with a narrow crystallite‑size distribution together with straightforward, scalable and reproducible crystallization procedures. In this work we demonstrate how sonocrystallization, <i>i.e.</i> application of ultrasounds during the crystallization process, can afford, very quickly, powders made of crystallites with controlled size, morphology and purity. We show that this process drastically diminishes the crystallite‑size distribution (low Polydispersity Indexes, PDI) and crystallite aspect ratio. By comparing sonicated samples with various silent crystallization conditions, we unambiguously show that the improvement of the crystallite morphologies and size‑distribution is not due to any thermal effect but to the sonication of the crystallizing media. The application of sonocrystallization on crystallization batches of Single‑Chain Magnets (SCM) maintains SCMs chemical integrity together with their original magnetic behavior. Moreover, luminescent measurements show that sonocrystallization induces an efficient micromixing that drastically enhances the purity of the SCMs powders. We thus propose that sonocrystallization, which is already used on organic or MOF compounds, can be applied to (magnetic) coordination compounds to readily afford bulk powders for characterization or shaping techniques that require pure, morphology‑ and crystallite‑size‑controlled powder samples.</p> <p><br> </p>

Tuning the magnetization dynamics of TbIII-based single-chain magnets through substitution on the nitronyl nitroxide radical

A minor change of the site of the substituent on the nitronyl nitroxide radical significantly influences the magnetization dynamics of two single-chain magnets, due to the influence of both the magnetic anisotropies of the TbIII centers and magnetic couplings along the chains.

Single-chain magnets assembled in cobalt(ii) metal–organic frameworks

This feature article discusses the advantages, progress and prospects of constructing single-chain magnets in metal–organic frameworks.

How to link theory and experiment for single-chain magnets beyond the Ising model: magnetic properties modeled from ab initio calculations of molecular fragments

Properties of 1D periodic magnetic chains can be described on the basis of results from ab initio multi-reference calculations performed for individual spin centers, which provides a basis for investigations on their dynamic magnetic properties.