The kinetics and mechanism of nanoconfined molten salt reactions: trimerization of potassium and rubidium dicyanamide

Physical Chemistry Chemical Physics : PCCP
Benjamin Yancey, Sergey Vyazovkin

Abstract

This study highlights the effect of the aggregate state of a reactant on the reaction kinetics under the conditions of nanoconfinement. Our previous work (Phys. Chem. Chem. Phys., 2014, 16, 11409) has demonstrated considerable deceleration of the solid state trimerization of sodium dicyanamide in organically modified silica nanopores. In the present study we use FTIR, NMR, pXRD, TGA and DSC to analyze the kinetics and mechanism of the liquid state trimerization of potassium and rubidium dicyanamide under similar conditions of nanoconfinement. It is found that nanoconfinement accelerates dramatically the kinetics of the liquid state trimerization, whereas it does not appear to affect the reaction mechanism. Kinetic analysis indicates that the acceleration is associated with an increase in the preexponential factor. Although nanoconfinement has the opposite effects on the respective kinetics of solid and liquid state trimerization, both effects are linked to a change in the preexponential factor. The results obtained are consistent with our hypothesis that the effects differ because nanoconfinement may promote disordering of the solid and ordering of the liquid reaction media.

References

Sep 1, 1991·Physical Review. B, Condensed Matter·R Mu, V M Malhotra
Oct 10, 2002·Chemical Reviews·Jairton DupontPaulo A Z Suarez
Sep 16, 2004·Journal of the American Chemical Society·Lorna CrowhurstTom Welton
Sep 17, 2005·The Journal of Chemical Physics·Zdravko KutnjakSergey B Vakhrushev
May 20, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Isabel Correia, Tom Welton
May 26, 2010·The Journal of Physical Chemistry. B·Yung P Koh, Sindee L Simon
Sep 16, 2010·The Journal of Physical Chemistry. B·Camille AlzinaAlice Mija
Nov 17, 2010·Chemical Society Reviews·Colin D HubbardRudi van Eldik
Jan 21, 2011·The Journal of Physical Chemistry. B·Yung P Koh, Sindee L Simon
Jun 19, 2012·The Journal of Physical Chemistry. B·Raffaele ZavagliaLuc Vincent
Mar 29, 2014·Nanoscale·Shengchun Yang, Xiao Luo
Apr 20, 2014·Chemical Society Reviews·Zhi-cheng ZhangXun Wang
May 7, 2014·Physical Chemistry Chemical Physics : PCCP·Benjamin Yancey, Sergey Vyazovkin
Sep 27, 2014·International Journal of Nanomedicine·Volkmar WeissigNicole Murdock

❮ Previous
Next ❯

Citations

Jun 17, 2016·The Journal of Physical Chemistry. B·Victoria L StanfordSergey Vyazovkin
May 4, 2016·Physical Chemistry Chemical Physics : PCCP·Sergey Vyazovkin
Oct 27, 2016·Physical Chemistry Chemical Physics : PCCP·J Rachel PradoSergey Vyazovkin
Aug 18, 2016·Physical Chemistry Chemical Physics : PCCP·Tatsiana Liavitskaya, Sergey Vyazovkin
Dec 23, 2016·Macromolecular Rapid Communications·Sergey Vyazovkin
Jul 29, 2017·Environmental Science & Technology·J J PignatelloWenqing Xu
Feb 16, 2018·Chemistry : a European Journal·Geonhui ParkChristopher W Bielawski
Nov 7, 2019·Polymers·Anna SangregorioNicolas Sbirrazzuoli
Sep 25, 2017·The Journal of Chemical Physics·J Rachel Prado, Sergey Vyazovkin
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sergey Vyazovkin

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.