Results 61 to 70 of about 1,224,578 (297)

Nuclear magnetic resonance cryoporometry [PDF]

, 2008
Nuclear Magnetic Resonance (NMR) cryoporometry is a technique for non-destructively determining pore size distributions in porous media through the observation of the depressed melting point of a confined liquid.
Mitchell, J., Strange, John H., Webber, J. Beau W.   +2 more
core   +1 more source

NMR Principles

, 1999
The basic theory behind NMR spectroscopy is described. The various NMR parameters that can be obtained from NMR spectra are explained, including the chemical shift, spin-spin coupling, and relaxation. Some explanation of the theory of how NMR is detected is also presented. © 1999 Elsevier Ltd All rights reserved.
openaire   +2 more sources

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Sulfonation of poly(p-phenylenediamine) polymer

Cogent Engineering, 2017
The sulfonation of poly(p-phenylenediamine) (P(pPD)) polymer was accomplished by oxidative copolymerization of p-phenylenediamine (pPD) with 2,5-diaminobenzenesulfonic acid (DABSA) and 2-aminobenzenesulfonic acid (2ABSA) monomers with 50/50 mol% ratios ...
Ismael Amer
doaj   +1 more source

Stereochemical Studies on a New Ciramadol Analogue by NMR-Spectroscopy [PDF]

, 1994
The absol. configuration of a Ciramadol analogue obtained from (-)-menthone is established by 'H-NMR-. simulated NMR-, COSY-90-, and NOEmeasurements. The final compound 2-(a-1 -pyrrolidino)benzy 1-4-isopropyl- 1 -methyl-cyclohexan-3-one (4b), e.g..
Akgün, H., Burgemeister, Thomas, Ertan, M., Wiegrebe, Wolfgang, Özarslan, Ö.   +4 more
core  

Emergent Spin‐Glass Behavior in an Iron(II)‐Based Metal–Organic Framework Glass

Advanced Functional Materials, EarlyView.
A one‐pot, solvent‐free synthesis yields an Fe2+‐based metal‐organic framework (MOF) glass featuring a continuous random network structure. The material exhibits spin‐glass freezing at 14 K, driven by topological‐disorder and short‐range magnetic frustration, showcasing the potential of MOF glasses as a plattform for cooperative magnetic phenomena in ...
Chinmoy Das, Soma Salamon, Joachim Landers, Jan‐Benedikt Weiß, Wen‐Long Xue, Pascal Kolodzeiski, Roman Pallach, Heiko Wende, Sebastian Henke   +8 more
wiley   +1 more source

Study on microscopic pore throat mobilization characteristics of associated gas flooding in fractured volatile reservoirs

Youqi dizhi yu caishoulu
In fractured volatile oil reservoirs， the fractures are well developed. The conventional water flooding development shows the production characteristics of ineffective water injection.
PAN Yue, LIU Huiqing, ZHOU Song, WANG Lianguo, GUO Sheng, CHEN Zhihai, SI Chaonian, LUO Chen, WANG Zuochen   +8 more
doaj   +1 more source

Determination of Polybutadiene Unsaturation Content in Thermal and Thermo-Oxidative Degradation Processes by NMR [PDF]

علوم و تکنولوژی پلیمر, 2013
The unsaturation content of various polybutadiene (PBD) types of 1,4-cis, 1,4-trans and 1,2-vinyl isomers with different molecular weights was investigated.
Farshid Ziaee
doaj   +1 more source

A self optimizing synthetic organic reactor system using real-time in-line NMR spectroscopy [PDF]

, 2015
A configurable platform for synthetic chemistry incorporating an in-line benchtop NMR that is capable of monitoring and controlling organic reactions in real-time is presented.
Cronin, Leroy, Dragone, Vincenza, Porwol, Luzian, Sans Sangorrin, Victor   +3 more
core   +2 more sources

Chemoselective Sequential Polymerization: An Approach Toward Mixed Plastic Waste Recycling

Advanced Functional Materials, EarlyView.
Inspired by biological protein metabolism, this study demonstrates the closed‐loop recycling of mixed synthetic polymers via ring‐closing depolymerization followed by a chemoselective sequential polymerizations process. The approach recovers pure polymers from mixed feedstocks, even in multilayer formats, highlighting a promising strategy to overcome a
Gadi Slor, Youwei Ma, Hyunwoo Park, Tae‐Lim Choi, Damien Guironnet, Francesco Stellacci   +5 more
wiley   +1 more source