Electrochemical Switching of Laser-Induced Graphene/Polymer Composites for Tunable Electronics.

Laser reduction of graphene oxide (GO) is a promising approach for achieving flexible, robust, and electrically conductive graphene/polymer composites. Resulting composite materials show significant technological potential for energy storage, sensing, and bioelectronics. However, in the case of insulating polymers, the properties of electrodes show severely limited performance.

The Ground State of Multispin Systems Based on Verdazyl and Nitrene Radicals: An EPR and Quantum-Chemical Study.

In this study, low-temperature EPR spectroscopy and quantum-chemical techniques were employed to investigate multispin systems─1,5-diphenyl-3-(3-nitrenophenyl)-6-oxoverdazyl and 1,5-diphenyl-3-(4-nitrenophenyl)-6-oxoverdazyl─that contain a nitrene center at either a - or -position, respectively. Ground states and magnetic zero-field splitting (ZFS) parameters of these multispin systems were determined by experimental and computational methods. The results indicated that the high-spin quartet state is a ground state, and the quartet-doublet energy gap is close to 10 kcal/mol for the -position of the nitrene group, with ZFS parameters = 0.

N-Heterocycle-coordinated -iodanes as IBX alternatives for alcohol oxidations.

We report the synthesis of novel N-coordinated -iodanes as a unique class of hypervalent iodine compounds. X-ray diffraction analysis revealed their intriguing (pseudo)cyclic structure, showcasing distinctive N⋯I-secondary bonding interactions. We demonstrate the generation of reactive diacetoxy derivatives, which exhibits remarkable efficacy in alcohol oxidation reactions.

[Identification of meldonium in the urine of volunteers using high-performance liquid chromatography-tandem mass spectrometry after consumption of milk of cows treated with a preventive course of the veterinary drug Emidonol].

Emidonol is a Russian antioxidant drug, widely used in veterinary medicine both for prophylactic purposes and under pathological conditions associated with oxygen deficiency. The product of its biotransformation in animals is meldonium, which is a metabolic modulator and has been included on the Prohibited List by the World Anti-Doping Agency (WADA) since 2016. In the presented research, volunteers once consumed samples of milk from cows that had undergone a 15-day course of the veterinary drug Emidonol® 10%, obtained from one of the farms in the Moscow region.

Photochemistry dominates over photothermal effects in the laser-induced reduction of graphene oxide by visible light.

Graphene oxide (GO) possesses specific properties that are revolutionizing materials science, with applications extending from flexible electronics to advanced nanotechnology. A key method for harnessing GO's potential is its laser-induced reduction, yet the exact mechanisms - photothermal versus photochemical effects - remain unclear. Herein, we discover the dominant role of photochemical reactions in the laser reduction of GO under visible light, challenging the prevailing assumption that photothermal effects are dominant.