نتایج جستجو برای: paramagnetic materials

تعداد نتایج: 445890  

Journal: :International journal of molecular sciences 2016
André Zabel Alette Winter Alexandra Kelling Uwe Schilde Peter Strauch

Metal-containing ionic liquids (ILs) are of interest for a variety of technical applications, e.g., particle synthesis and materials with magnetic or thermochromic properties. In this paper we report the synthesis of, and two structures for, some new tetrabromidocuprates(II) with several "onium" cations in comparison to the results of electron paramagnetic resonance (EPR) spectroscopic analyses...

Journal: :Dalton transactions 2013
Ignacio Caretti Sepideh Zamani Evi Beyers Pegie Cool Sabine Van Doorslaer

Metal incorporation and doping is one of the routes commonly explored to improve visible light photocatalytic activity of titania and related materials. In this work, we explore the effect of copper and vanadium deposition and incorporation in multi-walled hydrogen trititanate and mixed-phase anatase/trititanate nanotubes. The molecular designed dispersion method is used to introduce the metals...

2015
Judith Schlagnitweit Mingxue Tang Maria Baias Sara Richardson Staffan Schantz Lyndon Emsley

Particle and domain sizes strongly influence the properties of materials. Here we present an NMR approach based on paramagnetic relaxation enhancement (PRE) relayed by spin diffusion (SD), which allows us to determine lengths in the nm-μm range. We demonstrate the method on multicomponent organic polymer mixtures by selectively doping one component with a paramagnetic center in order to measure...

2004
Yossi Weinstein

Algorithmic Cooling is a method that uses novel data compression techniques and simple quantum computing devices to improve NMR spectroscopy, and to offer scalable NMR quantum computers. The algorithm recursively employs two steps. A reversible entropy compression of the computation quantum-bits (qubits) of the system and an irreversible heat transfer from the system to the environment through ...

2016
Martin Glavinović Feng Qi Athanassios D. Katsenis Tomislav Friščić Jean-Philip Lumb

We develop an associative synthesis of metal–organic materials that combines solid-state metal oxidation and coordination-driven self-assembly into a one-step, waste-free transformation. The methodology hinges on the unique reactivity of ortho-quinones, which we introduce as versatile oxidants for mechanochemical synthesis. Our strategy opens a previously unexplored route to paramagnetic metal–...

Journal: :Chemical science 2016
Martin Glavinović Feng Qi Athanassios D Katsenis Tomislav Friščić Jean-Philip Lumb

We develop an associative synthesis of metal-organic materials that combines solid-state metal oxidation and coordination-driven self-assembly into a one-step, waste-free transformation. The methodology hinges on the unique reactivity of ortho-quinones, which we introduce as versatile oxidants for mechanochemical synthesis. Our strategy opens a previously unexplored route to paramagnetic metal-...

2004
V. P. Mineev

The theory of paramagnetic limit of superconductivity in metals without inversion center is developed. There is in general the paramagnetic suppression of superconducting state. The effect is strongly dependent on field orientation in respect to crystal axes. The reason for this is that the degeneracy of electronic states with opposite momenta k and −k forming of Cooper pairs is lifted by magne...

2014
Björn Corzilius Vladimir K. Michaelis Susanne A. Penzel Enrico Ravera Albert A. Smith Claudio Luchinat Robert G. Griffin

The study of inorganic crystalline materials by solid-state NMR spectroscopy is often complicated by the low sensitivity of heavy nuclei. However, these materials often contain or can be prepared with paramagnetic dopants without significantly affecting the structure of the crystalline host. Dynamic nuclear polarization (DNP) is generally capable of enhancing NMR signals by transferring the mag...

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