Neutral d8 metal bis-dithiolene complexes: Synthesis,electronic properties and applications

Transition metal bis-dithiolene complexes show a large variety of physical properties such as conductivity, magnetism, optics, which render them attractive for new generations of devices. This review scans neutral d⁸ metal bis-dithiolene complexes as a function of their chemical structure, and the properties that make them top-quality products for applications in the opto-electronic domain.     

Preparation of Organic-Inorganic Polymers: Reaction of Functionalized Cyclotfuphosphazenes with Diisocyanates

Abstract

Synthesis of new urethane-phosphazene polymers: reaction of cyclotriphosphazenes containing hydroxyl functions with diisocyanates.     

TTF[Ni(dmit)2]2: Now as Thin Films and Nanowires

Thin films and nanowires of the molecular superconductor TTF[Ni(dmit)₂]₂ (TTF = tetrathiafulvalene, dmit²⁻=2-thioxo-1,3-dithiol-4,5-dithiolato) are obtained by dipping process on stainless-steel and silicon conversion coatings and on a microrough silicon surface. The deposits are characterized by SEM, Raman spectroscopy and conductivity measurements.     

Preavalanche instabilities in a granular pile

We investigate numerically the transition between static equilibrium and dynamic surface flow of a 2D cohesionless granular system driven by a continuous gravity loading. This transition is characterized by intermittent local dynamic rearrangements and can be described by an order parameter defined as the density of critical contacts, i.e., contacts where the friction is fully mobilized. Analysis of the spatial correlations of critical contacts shows the occurrence of "fluidized" clusters which exhibit a power-law divergence in size at the approach of the stability limit. The results are compatible with recent models that describe the granular system during the static/dynamic transition as a multiphase system.     

Obtention de nouveaux squelettes diterpéniques au cours de l'isomérisation des époxydes-7,8 isopimarates de méthyle par l'éthérate de trifluorure de bore

The action of borontrifluoride etherate on methyl isopimarate 7,8 epoxides has been studied. A backbone rearrangement and the obtention of compounds with new skeletons are reported.     

First one-dimensional stress-strain experiments inside an aperiodic inclusion compound: evidence of depinning effects

This Letter reports on the first observation of depinning under hydrostatic pressure of the guest and host sublattices inside the aperiodic nonadecane-urea inclusion compound. This leads to a unique way for a direct determination of the one-dimensional interguest interaction (1 N/m for nonadecane).     

Optimization of Sample Preparation for Metabolomics Exploration of Urine,Feces, Blood and Saliva in Humans Using Combined NMR and UHPLC-HRMS Platforms

Currently, most clinical studies in metabolomics only consider a single type of sample such as urine, plasma, or feces and use a single analytical platform, either NMR or MS. Although some studies have already investigated metabolomics data from multiple fluids, the information is limited to a unique analytical platform. On the other hand, clinical studies investigating the human metabolome that combine multi-analytical platforms have focused on a single biofluid. Combining data from multiple sample types for one patient using a multimodal analytical approach (NMR and MS) should extend the metabolome coverage. Pre-analytical and analytical phases are time consuming. These steps need to be improved in order to move into clinical studies that deal with a large number of patient samples. Our study describes a standard operating procedure for biological specimens (urine, blood, saliva, and feces) using multiple platforms (¹H-NMR, RP-UHPLC-MS, and HILIC-UHPLC-MS). Each sample type follows a unique sample preparation procedure for analysis on a multi-platform basis. Our method was evaluated for its robustness and was able to generate a representative metabolic map.     

Electrical conductivity and spin crossover: a new achievement with a metal bis dithiolene complex

Three new compounds based on the cationic complex [Fe(III)(3-R-salEen)(2)]+ (salEen stands for N-(2-ethylamino)ethyl)-salicylaldimine, R = H, CH(3)O) with the electroactive Ni(dmit)(2) species as a counterion (dmit stands for 1,3-dithia-2-thione-4,5-dithiolato) have been synthesized and structurally and magnetically characterized. Compound 1 ([Ni(dmit)(2)][Fe(3-OMe-salEen)(2)]. CH(3)OH) shows an apparent hysteresis loop, due to an irreversible desolvatation process. Compound 2 ([Ni(dmit)(2)](NO(3))[Fe(salEen)(2)](2)) exhibits a gradual and incomplete spin transition. Compound 3 ([Ni(dmit)(2)](5)[Fe(salEen)(2)](2), 6CH(3)CN) is a fractional oxidation state complex, which behaves like a semiconductor and exhibits a gradual but complete spin transition between 300 and 4 K.