Results 101 to 110 of about 1,457,064 (320)

Robust conversion of singlet spin order in coupled spin-1/2 pairs by adiabatically switched RF-fields

, 2016
We propose a robust and highly efficient NMR technique to create singlet spin order from longitudinal spin magnetization in coupled spin-1/2 pairs and to perform backward conversion (singlet order)$\to$magnetization.
Ivanov, Konstantin L., Kiryutin, Alexey S., Pravdivtsev, Andrey N., Vieth, Hans-Martin, Yurkovskaya, Alexandra V.   +4 more
core   +1 more source

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

Advanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang, Jinliang Lv, Yichun Lu, Hanfeng Ye, Xuan Zhang, Leonardo Cancellara, Nadezda Tarakina, Jiande Lin, Xin Gao, Oleksandr Savateev, Jiajia Cheng   +10 more
wiley   +1 more source

Chemometric Analysis of Low-field ¹H NMR Spectra for Unveiling Adulteration of Slimming Dietary Supplements by Pharmaceutical Compounds

Molecules, 2020
The recent introduction of compact or low-field (LF) NMR spectrometers that use permanent magnets, giving rise to proton (1H) NMR frequencies between 40 and 80 MHz, have opened up new areas of application.
Nao Wu, Stéphane Balayssac, Saïda Danoun, Myriam Malet-Martino, Véronique Gilard   +4 more
doaj   +1 more source

Magnetization profiles and NMR spectra of doped Haldane chains at finite temperatures

, 2000
Open segments of S=1 antiferromagnetic spin chains are studied at finite temperatures and fields using continuous time Quantum Monte Carlo techniques. By calculating the resulting magnetization profiles for a large range of chain lengths with fixed field
A. P. Ramirez, B. B. Beard, C. D. Batista, C. D. Batista, C. Payen, E. Polizzi, E. S. Sørensen, E. S. Sørensen, E. S. Sørensen, F. Alet, F. D. M. Haldane, F. D. M. Haldane, F. Tedoldi, G. E. Granroth, H. G. Evertz, H. J. Schulz, H. Onishi, I. Affleck, I. Affleck, J. P. Renard, J. P. Renard, J. P. Renard, K. Harada, L. C. Brunel, L. P. Regnault, M. Hagiwara, M. Hagiwara, M. Hagiwara, M. Kolb, M. P. Nightingale, O. Golinelli, O. Golinelli, R. Botet, R. Botet, S. H. Glarum, S. Ma, S. Miyashita, S. R. White, S. R. White, T. Kennedy, W. J. L. Buyers, W. Lu, W. Palme, Y. J. Kim   +43 more
core   +2 more sources

Ultrahigh‐Yield, Multifunctional, and High‐Performance Organic Memory for Seamless In‐Sensor Computing Operation

Advanced Functional Materials, EarlyView.
Molecular engineering of a nonconjugated radical polymer enables a significant enhancement of the glass transition temperature. The amorphous nature and tunability of the polymer, arising from its nonconjugated backbone, facilitates the fabrication of organic memristive devices with an exceptionally high yield (>95%), as well as substantial ...
Daeun Kim, Jaehyoung Ko, Namju Kim, Quynh H. Nguyen, Hoyeon Lee, Joohwan Eo, Seongeon Jin, Ji Eon Kwon, Seung‐Yeol Jeon, Youngdo Jeong, Dongseok Kwon, Sung Gap Im, Sanghan Lee, Byung Chul Jang, Yongho Joo   +14 more
wiley   +1 more source

Micropermeation mechanism of PVC-P geomembranes by low-field NMR technology

Yantu gongcheng xuebao
The impermeability of PVC-P geomembranes is of significant importance to the safe operation of a project. To avoid the drawbacks of adopting the permeability coefficient to characterize permeability traditionally, a mathematical model for porosity and ...
ZHANG Xianlei , YIN Chunjie , MA Zhongyang , GU Xiaoyu
doaj   +1 more source

Experimental Analysis of Pore and Permeability Characteristics of Coal by Low-Field NMR

Applied Sciences, 2018
On the basis of the complexity of the pore structure characteristics of a coal reservoir, coal samples with different ranks were selected to study the difference in pore structures and permeability using nuclear magnetic resonance (NMR), scanning ...
Xiaofeng Ji, Dangyu Song, Haotian Zhao, Yunbo Li, Kaikai He   +4 more
doaj   +1 more source

NMR relaxation rate in the field-induced octupolar liquid phase of spin-1/2 J1-J2 frustrated chains

, 2011
In the spin-1/2 frustrated chain with nearest-neighbor ferromagnetic exchange J1 and next-nearest-neighbor antiferromagnetic exchange J2 under magnetic field, magnetic multipolar-liquid (quadrupolar, octupolar, and hexadecapolar) phases are widely ...
, Baran M, Drechsler S-L, Enderle M, Furukawa S, Giamarchi T, Giamarchi T, Hase M, Hikihara T, Hikihara T, Hikihara T, Masahiro Sato, Masuda T, Sato M, Sato M, Sato M, See, Sudan J, Svistov L E, Toshiya Hikihara, Tsutomu Momoi, Wolter A U B, Wolter A U B   +22 more
core   +1 more source

Determination of physicochemical properties of biodiesel and blends using low-field NMR and multivariate calibration

Fuel, 2019
Because the methods specified by regulatory agencies for the determination of the physicochemical properties of biodiesel can be laborious and expensive, the development of alternative methodologies represents a major breakthrough.
André F. Constantino, D. Cubides-Roman, R. B. D. Santos, Luiz H. K. Queiroz, L. Colnago, Á. Neto, L. L. Barbosa, W. Romão, E. Castro, P. Filgueiras, Valdemar Lacerda   +10 more
semanticscholar   +1 more source

Hydrogen‐Bond‐Rich Supramolecular Multiblock Copolymers Facilitate Rapid Zn2+ Migration in Quasi‐Solid‐State Zinc‐Ion Batteries

Advanced Functional Materials, EarlyView.
The disordered growth of dendrites, corrosion, parasitic side reactions, slow de‐solvation kinetics, and inherent safety risks significantly hinder the practical deployment of conventional liquid electrolyte zinc‐ion batteries. In contrast, the novel PU‐EG+DMPA‐Zn polyurethane quasi‐solid‐state electrolyte, enriched with abundant polar functional ...
Ruiqi Liu, Changding Wang, Fu Wan, Kaida Hu, Da Yang, Yaoyang Xia, Wenwei Yin, Yupeng Lin, Yuejiao Chen, Shuhui Sun, Weigen Chen   +10 more
wiley   +1 more source