Role of ultramicropore on the remarkable gas storage in hypercrosslinked polystyrene networks studied by positron annihilation

2021 ◽  
Author(s):  
Yilin Li ◽  
Junjie Liu ◽  
Jingjing Kong ◽  
Ning qi ◽  
Zhiquan Chen
Keyword(s):  
Positron Annihilation ◽  
Gas Storage ◽  
Bulk Polymerization ◽  
Hypercrosslinked Polystyrene ◽  
Alkylation Reaction

In this paper, hypercrosslinked polystyrene (HCLPS) networks were synthesized by radical bulk polymerization and Friedel-Crafts alkylation reaction using vinylbenzyl-co-divinylbenzene chloride (VBC-DVB) as the precursors. A series of HCLPS were prepared...

scholarly journals The role of molecular modelling and simulation in the discovery and deployment of metal-organic frameworks for gas storage and separation

2019 ◽  
Vol 45 (14-15) ◽  
pp. 1082-1121 ◽  
Author(s):  
Arni Sturluson ◽  
Melanie T. Huynh ◽  
Alec R. Kaija ◽  
Caleb Laird ◽  
Sunghyun Yoon ◽  
...  
Keyword(s):  
Molecular Modelling ◽  
Metal Organic Frameworks ◽  
Gas Storage ◽  
Modelling And Simulation ◽  
Metal Organic

THE ROLE OF ADSORPTION IN CONTROLLING THE RATE OF REACTION OF CHLORAMBUCIL WITH PROTEIN

1963 ◽  
Vol 41 (4) ◽  
pp. 931-939 ◽  
Author(s):  
J. H. Linford
Keyword(s):  
Molecular Weight ◽  
Carboxylic Acid ◽  
Bovine Serum Albumin ◽  
Inverse Relationship ◽  
Reaction Rate ◽  
The Other ◽  
Alkylation Reaction ◽  
Rate Of Reaction

Two proteins, haemoglobin and bovine serum albumin, have been studied with respect to their rates of alkylation by chlorambucil in vitro at 37 °C and pH 8.4. The proteins are of nearly the same molecular weight and free carboxylic acid content, but the alkylation reaction is 30 times faster with haemoglobin. On the other hand, the adsorption of chlorambucil by albumin is 20 times greater than that exhibited by haemoglobin. This inverse relationship between extent of adsorption and reaction rate suggests that adsorption protects the chlorambucil from activation in the solvent.

scholarly journals Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders

RSC Advances ◽  
2020 ◽  
Vol 10 (30) ◽  
pp. 17795-17804
Author(s):  
Pinnelli S. R. Prasad ◽  
Burla Sai Kiran ◽  
Kandadai Sowjanya
Keyword(s):  
Methane Hydrate ◽  
Gas Storage ◽  
Water Molecules ◽  
Confined Water ◽  
Methane Gas

Rapid and efficient methane hydrate conversions by utilising the water molecules confined in intra- and inter-granular space of silica powders.

scholarly journals The role of positronium decoherence in positron annihilation in matter

2011 ◽  
Vol 375 (44) ◽  
pp. 3872-3876
Author(s):  
M. Pietrow ◽  
P. Słomski
Keyword(s):  
Positron Annihilation

scholarly journals The Role of Molecular Modeling & Simulation in the Discovery and Deployment of Metal-Organic Frameworks for Gas Storage and Separation

2019 ◽  
Author(s):  
Arni Sturluson ◽  
Melanie T. Huynh ◽  
Alec Kaija ◽  
Caleb Laird ◽  
Sunghyun Yoon ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Metal Organic Frameworks ◽  
Gas Storage ◽  
Chemical Warfare Agent ◽  
Nanoporous Materials ◽  
Oxygen Storage ◽  
Metal Organic ◽  
Computational Materials ◽  
Computational Discovery

Metal-organic frameworks (MOFs) are highly tunable, extended-network, crystalline, nanoporous materials with applications in gas storage, separations, and sensing. We review how molecular models and simulations of gas adsorption in MOFs have lucidly impacted the discovery of performant MOFs for methane, hydrogen, and oxygen storage, xenon, carbon dioxide, and chemical warfare agent capture, and xylene enrichment. Particularly, we highlight how large, open databases of MOF crystal structures, post-processed for molecular simulations, are a platform for computational materials discovery. We pontificate how to orient research efforts to routinize the computational discovery of MOFs for adsorption-based engineering applications.

High-density magnetic-vacancy inclusion in Co2MnGa single crystal probed by spin-polarized positron annihilation spectroscopy

2021 ◽  
Author(s):  
Atsumi Miyashita ◽  
M. Maekawa ◽  
Y. Shimoyama ◽  
N. Seko ◽  
Atsuo Kawasuso ◽  
...  
Keyword(s):  
Single Crystal ◽  
Positron Annihilation ◽  
Electrical Transport ◽  
Positron Annihilation Spectroscopy ◽  
Ordered Structure ◽  
Electrical Transport Properties ◽  
Weyl Semimetal ◽  
Spin Polarized ◽  
B2 Structure

Abstract Co2MnGa is a Weyl semimetal exhibiting giant anomalous Hall and Nernst effects. Using spin-polarized positron annihilation spectroscopy, we examined a Bridgman-grown Co2MnGa single crystal with a nearly perfect L21-ordered structure and a reference Co2MnAl polycrystal with a Mn-Al-disordered B2 structure. We found that a large amount of magnetic vacancies (more than 100 ppm) were included in the Co2MnGa crystal but not the Co2MnAl crystal. We discuss possible reasons for the inclusion of vacancies, the role of vacancies in the development of the ordered structure, and the electronic states associated with the vacancies. Towards the development of Co2MnGa-based devices, the manners for reducing vacancies as well as the influence of vacancies on the electrical transport properties should be considered.

Deciphering the Role of Charge Compensator in Optical Properties of SrWO4:Eu3+:A (A = Li+, Na+, K+): Spectroscopic Insight Using Photoluminescence, Positron Annihilation, and X-ray Absorption

2018 ◽  
Vol 57 (2) ◽  
pp. 821-832 ◽  
Author(s):  
Santosh Kumar Gupta ◽  
Kathi Sudarshan ◽  
Ashok Kumar Yadav ◽  
Ruma Gupta ◽  
Dibyendu Bhattacharyya ◽  
...  
Keyword(s):  
Optical Properties ◽  
Positron Annihilation ◽  
X Ray ◽  
Charge Compensator ◽  
X Ray Absorption

The role of the residual bitumen in the gas storage capacity of mature lacustrine shale: A case study of the Triassic Yanchang shale, Ordos Basin, China

2016 ◽  
Vol 69 ◽  
pp. 205-215 ◽  
Author(s):  
Fengyang Xiong ◽  
Zhenxue Jiang ◽  
Jianfa Chen ◽  
Xiangzeng Wang ◽  
Zhilong Huang ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Ordos Basin ◽  
Gas Storage ◽  
Lacustrine Shale
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