Liquid state DNP using a 260 GHz high power gyrotron
Literature Information
Vasyl Denysenkov, Mark J. Prandolini, Marat Gafurov, Deniz Sezer, Burkhard Endeward, Thomas F. Prisner
Dynamic nuclear polarization (DNP) at high magnetic fields (9.2 T, 400 MHz 1H NMR frequency) requires high microwave power sources to achieve saturation of the EPR transitions. Here we describe the first high-field liquid-state DNP results using a high-power gyrotron microwave source (20 W at 260 GHz). A DNP enhancement of −29 on water protons was obtained for an aqueous solution of Fremy's Salt; in comparison the previous highest value was −10 using a solid-state microwave power source (maximum power 45 mW). The increased enhancements are partly due to larger microwave saturation and elevated sample temperature. These experimentally observed DNP enhancements, which by far exceed the predicted values extrapolated from low-field DNP experiments, demonstrate experimentally that DNP is possible in the liquid state also at high magnetic fields.
Recommended Journals
Related Literature
Core-softened water–alcohol mixtures: the solute-size effects
Murilo S. Marques, Vinicius F. Hernandes, José Rafael Bordin
DOI: 10.1039/D1CP00751C
Probing the solute-drag effect and its role in stabilizing the orthorhombic phase in bulk La-doped HfO2 by X-ray and gamma ray spectroscopy
DOI: 10.1039/D1CP00096A
Revisiting the glass transition temperature of water–glycerol mixtures in the bulk and confined in mesoporous silica
Ivette Angarita, Ma. Florencia Mazzobre
DOI: 10.1039/D1CP02153B
Theoretical study of the dissociative photodetachment dynamics of the hydrated superoxide anion cluster
Yu Hashimoto, Kohei Saito, Toshiyuki Takayanagi, Hiroto Tachikawa
DOI: 10.1039/D1CP02379A
An augmented (multi-descriptor) grouping algorithm to optimize chemical ordering in nanoalloys
Davide Fioravanti, Giovanni Barcaro, Alessandro Fortunelli
DOI: 10.1039/D1CP03583E
Self-standing, conducting and capacitive biomimetic hybrid nanomembranes for selective molecular ion separation
Catherine Michaux, Eric A. Perpète, David Zanuy
DOI: 10.1039/D1CP01840J
Unravelling the nature of a toluene–fumaronitrile complex
Andrzej J. Kałka, Mateusz Z. Brela, Andrzej M. Turek
DOI: 10.1039/D1CP01895G
Identification of beryllium fluoride complexes in mechanically distorted gels using quadrupolar split 9Be NMR spectra resolved with solution-state selective cross-polarization
Konstantin Romanenko, Stuart J. Elliott, Aleksandr A. Shubin, Philip W. Kuchel
DOI: 10.1039/D1CP02515E
Single sheets of graphene for fabrication of fibers with enhanced mechanical properties
Muhammad G. Salim, Luke A. Thimons, Min A. Kim, Brennan Carr, Michelle Montgomery, Nathan Tolman, Tevis D. B. Jacobs, Haitao Liu
DOI: 10.1039/D1CP03238K
Aggregation-induced negative differential resistance in graphene oxide quantum dots
Sonia Sharma, Chieh-An Cheng, Svette Reina Merden Santiago, Denice N. Feria, Chi-Tsu Yuan, Sheng-Hsiung Chang, Tai-Yuan Lin, Ji-Lin Shen
DOI: 10.1039/D1CP01529J
You might also like
What precautions should be taken when handling 4-Methyl-6-(trifluoromethyl)quinoline (CAS: 40716-16-3)?
When handling 4-Methyl-6-(trifluoromethyl)quinoline (CAS: 40716-16-3), safety go...
What is 4-(3,5-Difluorophenyl)aniline (CAS: 405058-00-6)?
4-(3,5-Difluorophenyl)aniline is an aromatic organic compound with the CAS numbe...
How is 5-{[4-(Trifluoromethyl)phenyl]sulfanyl}-1,2,3-thiadiazole-4-carboxylic acid (CAS: 338982-07-3) typically synthesized?
5-{[4-(Trifluoromethyl)phenyl]sulfanyl}-1,2,3-thiadiazole-4-carboxylic acid can ...
What is the market or research trend for 4-Benzylaniline hydrochloride (CAS: 6317-57-3)?
The market for 4-Benzylaniline hydrochloride (CAS: 6317-57-3) is steadily growin...
Is [3-(Diethylsulfamoyl)phenyl]boronic acid (CAS: 871329-58-7) safe?
[3-(Diethylsulfamoyl)phenyl]boronic acid is generally considered safe when handl...
What are the main uses of 3-Bromo-2,5-dimethoxyaniline (CAS: 115929-62-9)?
3-Bromo-2,5-dimethoxyaniline is mainly used in the pharmaceutical and chemical i...
What regulatory guidelines apply to N-Methyl-1-(5-methyl-1H-indol-3-yl)methanamine (CAS: 915922-67-7)?
N-Methyl-1-(5-methyl-1H-indol-3-yl)methanamine (CAS: 915922-67-7) is subject to ...
What industries use Carbamic acid, N-[(5S)-5,6-diamino-6-oxohexyl]-, 1,1-dimethylethyl ester (CAS: 24828-96-4)?
This compound is primarily used in the pharmaceutical industry for the synthesis...
How should 2-Methyl-2-propanyl [(1S,3R)-3-aminocyclohexyl]carbamate (CAS: 1298101-47-9) be stored?
2-Methyl-2-propanyl [(1S,3R)-3-aminocyclohexyl]carbamate (CAS: 1298101-47-9) sho...
What industries use Ethyl 2-bromo-4,4,4-trifluorobutanoate (CAS: 367-33-9)?
Ethyl 2-bromo-4,4,4-trifluorobutanoate (CAS: 367-33-9) is utilized in the pharma...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










![Imidazo[1,2-c]pyrimidine structure Imidazo[1,2-c]pyrimidine structure](https://static.chemtradehub.com/structs/274/274-78-2-8b4c.webp)

![6,7-Dihydro-5H-pyrrolo[1,2-a]imidazole-6-carboxylic acid structure 6,7-Dihydro-5H-pyrrolo[1,2-a]imidazole-6-carboxylic acid structure](https://static.chemtradehub.com/structs/136/1369160-12-2-6524.webp)

