3,312 research outputs found
N′-(4-Fluorobenzylidene)acetohydrazide
The title compound, C9H9FN2O, was prepared by the reaction of 4-fluorobenzophenone and acethydrazide. In the molecule, all non-H atoms are essentially coplanar [r.m.s. deviation = 0.065 (2) Å]. In the crystal, molecules are linked into centrosymmetric dimers by pairs of intermolecular N—H⋯O hydrogen bonds
N′-[1-(4-Chlorophenyl)ethylidene]acetohydrazide
In the title compound, C10H11ClN2O, the dihedral angle between the acetohydrazide group and the aromatic ring is 33.76 (9)°. In the crystal, inversion dimers linked by pairs of N—H⋯O hydrogen bonds generate R
2
2(8) loops
Quantum-state engineering in cavity magnomechanics formed by two-dimensional magnetic materials
Cavity magnomechanics has become an ideal platform to explore macroscopic
quantum effects. Bringing together magnons, phonons, and photons in a single
physical system, it opens many opportunities for quantum technologies. It was
conventionally realized by a yttrium iron garnet, which exhibits a linear
magnon-phonon coupling , with
and being the magnon and phonon modes. Inspired by the
recent realization of two-dimensional (2D) magnets, we propose a new cavity
magnomechanical system with one of the cavity mirror formed by a 2D magnetic
material. Its anisotropic magnetostrictive interaction induces a unique
nonlinear phonon-magnon coupling .
It is found that a stable squeezing of the phonon and bi- and tri-partite
entanglements among the three modes are generated in the regimes with a
suppressed phonon number. Compared with previous schemes, ours does not require
any extra nonlinear interaction and reservoir engineering and is robust against
the thermal fluctuation. Enriching the realization of cavity magnomechanics,
our system exhibits its superiority in quantum-state engineering due to the
versatile interactions enabled by its 2D feature.Comment: 7 pages and 3 figures in the main text. 3 pages in the supplemental
materia
Online Coupling of Lab-on-Valve Format to Amperometry Based on Polyvinylpyrrolidone-Doped Carbon Paste Electrode and Its Application to the Analysis of Morin
The potential capabilities and analytical performance of lab-on-valve (LOV) manifold as a front end to amperometry have been explored for the on-line determination of morin. Meanwhile, the electrochemical behaviors of morin were investigated based on polyvinylpyrrolidone- (PVP-) doped carbon paste electrode (CPE), which found that PVP can significantly improve its oxidation peak current. The excellent amperometric current response was achieved when the potential difference (ΔE) of 0.6 V was implemented in pH 6.5 phosphate buffer solution (PBS) that served as the supporting electrolyte. A well-defined oxidation peak has been obtained in studies using PVP as a modifier of CPE based on the oxidation of morin. The present work introduces the LOV technique as a useful tool for amperometric measurement, documents advantages of using programmable flow, and outlines means for miniaturization of assays on the basis of PVP modified CPE. The proposed method was applied successfully to the determination of morin in real samples, and the spiked recoveries were satisfactory
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