An unprecedented trinuclear FeII triazole-based complex exhibiting a concerted and complete sharp spin transition above room temperature

Cooperative Triazole Based Spin Crossover FeII Coordination Polymers

Narsimhulu Pittala1, Smail Triki1, Franck Thétiot1, Kamel Boukheddaden2, Guillaume Chastanet3, Mathieu Marchivie3 1Department Of Chemistry, UMR CNRS 6521, Université De Bretagne Occidentale (UBO), Brest, France, 2Groupe d\'étude de la matière condensée (GEMaC), Université de Versailles Saint-Quentin, Versailles, France, 3CNRS, Université Bordeaux, ICMCB, UPR 9048, Bordeaux, France E-mail: narsi...

Above room temperature spin transition in a metallo-supramolecular coordination oligomer/polymer.

By use of a metallo-supramolecular concept, a linear iron(ii) coordination chain [Fe(II)(L)](n)(BF(4))(2n) (L = 1,4-bis(1,2':6',1''-bispyrazolylpyridin-4'-yl)benzene) was rationally designed and synthesized. The molecular chain shows a reversible spin transition at 323 K with a ca. 10 K wide hysteresis loop.

Transition Metal-Doped Oxide Semiconductor Exhibiting Room-Temperature Ferromagnetism

Electronic transition above room temperature in CaMn7O12 films

We report on the electronic phase transition in CaMn7O12 quadruple perovskite films synthesized by oxide molecular beam epitaxy on SrLaAlO4 and La0.3Sr0.7Al0.65Ta0.35O3 substrates. We use x-ray diffraction and transmission electron microscopy to confirm that the CaMn7O12 phase has been realized. Temperature dependent resistivity measurements reveal a signature of a charge ordering phase transit...

Freeze-drying above room temperature.

This study investigates the use of solid, organic compounds to lyophilize drugs without conventional freeze-drying equipment. The aim of the investigation is to find a pharmaceutically acceptable solvent or solvent combination that is appropriate for freeze-drying on the basis of its ability to (1) solubilize hydrophobic drugs, (2) provide a stable environment for water-sensitive compounds, (3)...