Exploring the No‐Man’s Land between Molecular Nanomagnets and Magnetic Nanoparticles

Abstract

The comparison of the structural and magnetic properties of molecular nanomagnets (MNM) and magnetic nanoparticles (MNP) can be instructive to get a deeper understanding of the magnetic behavior on the intermediate scale between molecular and bulk objects. In this respect iron oxo based clusters are particularly interesting, since they provide an increasing number of molecular systems with sizes close to that of iron oxide MNP. In this Minireview we report a survey of literature data aimed at improving our understanding of the emergence of MNP properties from MNM ones.

Mössbauer, X-ray and Magnetic Studies of Black Sand from the Italian Mediterranean Sea

“…It shows a small hysteresis of 200 Oe, a saturation in magnetic fields above 2000 Oe, and a saturation magnetization of 58.2 cm 3 Oe/g. In good agreement with published data on magnetite [21], the sample is a soft ferromagnet.…”

Magnetic metal-complex-conducting copolymer core–shell nanoassemblies for a single-drug anticancer platform

“…13,14 Other molecular magnets have been reported but cannot be practically applied due to the very low critical temperature at which they exhibit positive values of magnetization in response to a room temperature magnetic field. [23][24][25][26] However, Fe(salen) also has some drawbacks, such as poor water solubility, loss of magnetic properties in solvents and potential cytotoxicity when accumulated in organs. Herein, we report a simple, 'inorganic-metal-salt-free', one-step synthesis of a magnetic core-shell nanoassembly (hereafter CSNA) DDS nanocarrier, comprising Fe(salen) as a prodrug core, a biodegradable polypyrrole (PPy)-polycaprolactone (PCL)-shell (referred to as PP), and bovine serum albumin (BSA) or gum arabic (GA; Scheme 1).…”

Magnetic nanoparticles for tunable microwave metamaterials

“…They were ascribed to multiple quantum transitions originated from effects of magnetic anisotropy and dipolar interactions of nanoparticles. The both features are common in small quantum systems, such as single electron spins or small spin clusters [14], and not expected in classical macroscopic ferromagnets.…”