scholarly journals Comparison of alkene hydrogenation in carbon nanoreactors of different diameters: probing the effects of nanoscale confinement on ruthenium nanoparticle catalysis

2017 ◽  
Vol 5 (40) ◽  
pp. 21467-21477 ◽  
Author(s):  
Mehtap Aygün ◽  
Craig T. Stoppiello ◽  
Maria A. Lebedeva ◽  
Emily F. Smith ◽  
Maria del Carmen Gimenez-Lopez ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Optimum Level ◽  
Control Chemical ◽  
Competitive Hydrogenation ◽  
Hydrogenation Reactions ◽  
Alkene Hydrogenation ◽  
Nanoparticle Catalysis ◽  
Different Diameters

Exploratory, competitive hydrogenation reactions reveal the optimum level of confinement to control chemical reactions.

scholarly journals A chemical reaction controlled by light-activated molecular switches based on hetero-cyclopentanediyls

2019 ◽  
Vol 10 (12) ◽  
pp. 3486-3493 ◽  
Author(s):  
Jonas Bresien ◽  
Thomas Kröger-Badge ◽  
Stefan Lochbrunner ◽  
Dirk Michalik ◽  
Henrik Müller ◽  
...  
Keyword(s):  
Small Molecules ◽  
Computational Methods ◽  
Chemical Reactions ◽  
Chemical Reaction ◽  
Molecular Switches ◽  
Control Chemical

Biradicals were applied as molecular switches to control chemical reactions that involve the activation of small molecules. The mechanism was studied by experimental and computational methods.

A multi target approach to control chemical reactions in their inhomogeneous solvent environment

2015 ◽  
Vol 48 (23) ◽  
pp. 234003 ◽  
Author(s):  
Daniel Keefer ◽  
Sebastian Thallmair ◽  
Julius P P Zauleck ◽  
Regina de Vivie-Riedle
Keyword(s):  
Chemical Reactions ◽  
Control Chemical ◽  
Solvent Environment

scholarly journals Modulation of Prins Cyclization by Vibrational Strong Coupling

2019 ◽  
Author(s):  
Kenji Hirai ◽  
Rie Takeda ◽  
JAMES HUTCHISON ◽  
Hiroshi Uji-i
Keyword(s):  
Strong Coupling ◽  
Chemical Reactions ◽  
Reaction Pathway ◽  
Chemical Reactivity ◽  
Order Rate Constant ◽  
Pharmaceutical Chemistry ◽  
Prins Cyclization ◽  
Control Chemical ◽  
Aldehydes And Ketones ◽  
Enthalpy And Entropy

<div>Light-molecule strong coupling has emerged within the last decade as an entirely new method to control chemical reactions. A few years ago it was discovered that the chemical reactivity could be altered by vibrational strong coupling (VSC). While the potential of VSC in organic chemistry appears enormous, only a limited number of reactions have been investigated under VSC to date, including solvolysis and deprotection reactions. Here we investigate the effect of VSC on a series of aldehydes and ketones undergoing Prins cyclization, an important synthetic step in pharmaceutical chemistry. We observe a decrease of the second-order rate constant with VSC of the reactant carbonyl stretching groups. We measure an increased activation energy due to VSC, but proportional changes in activation enthalpy and entropy suggest no substantive change in reaction pathway. The addition of common cycloaddition reactions to the stable of VSC-modified chemical reactions is another step towards establishing VSC as a genuine tool for synthetic chemistry.</div>

A Study To Control Chemical Reactions Using Si:2p Core Ionization: Site-Specific Fragmentation

2011 ◽  
Vol 115 (32) ◽  
pp. 8822-8831 ◽  
Author(s):  
Shin-ichi Nagaoka ◽  
Hironobu Fukuzawa ◽  
Georg Prümper ◽  
Mai Takemoto ◽  
Osamu Takahashi ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Site Specific ◽  
Control Chemical

scholarly journals A tutored discourse on microcontrollers, single board computers and their applications to monitor and control chemical reactions

2020 ◽  
Vol 5 (2) ◽  
pp. 201-220 ◽  
Author(s):  
Daniel E. Fitzpatrick ◽  
Matthew O'Brien ◽  
Steven V. Ley
Keyword(s):  
Low Power ◽  
Chemical Reactions ◽  
Control Chemical ◽  
And Control ◽  
Monitor And Control

This Tutored Discourse constitutes a preliminary exposure on how synthesis chemists can engage positively with inexpensive, low-power microcontrollers to aid control, monitoring and optimisation of chemical reactions.

scholarly journals Membrane Technology in Catalytic Carbonylation Reactions

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 614 ◽  
Author(s):  
Francesco Galiano ◽  
Roberto Castro-Muñoz ◽  
Raffaella Mancuso ◽  
Bartolo Gabriele ◽  
Alberto Figoli
Keyword(s):  
Chemical Reactions ◽  
Dimethyl Carbonate ◽  
State Of The Art ◽  
Membrane Process ◽  
General Introduction ◽  
Hydrogenation Reactions ◽  
Membrane Technologies ◽  
And Function ◽  
Specific Membrane ◽  
Catalytic Carbonylation

In this review, the recent achievements on the use of membrane technologies in catalytic carbonylation reactions are described. The review starts with a general introduction on the use and function of membranes in assisting catalytic chemical reactions with a particular emphasis on the most widespread applications including esterification, oxidation and hydrogenation reactions. An independent paragraph will be then devoted to the state of the art of membranes in carbonylation reactions for the synthesis of dimethyl carbonate (DMC). Finally, the application of a specific membrane process, such as pervaporation, for the separation/purification of products deriving from carbonylation reactions will be presented.

scholarly journals Modulation of Prins Cyclization by Vibrational Strong Coupling

2019 ◽  
Author(s):  
Kenji Hirai ◽  
Rie Takeda ◽  
JAMES HUTCHISON ◽  
Hiroshi Uji-i
Keyword(s):  
Strong Coupling ◽  
Chemical Reactions ◽  
Reaction Pathway ◽  
Chemical Reactivity ◽  
Order Rate Constant ◽  
Pharmaceutical Chemistry ◽  
Prins Cyclization ◽  
Control Chemical ◽  
Aldehydes And Ketones ◽  
Enthalpy And Entropy

<div>Light-molecule strong coupling has emerged within the last decade as an entirely new method to control chemical reactions. A few years ago it was discovered that the chemical reactivity could be altered by vibrational strong coupling (VSC). While the potential of VSC in organic chemistry appears enormous, only a limited number of reactions have been investigated under VSC to date, including solvolysis and deprotection reactions. Here we investigate the effect of VSC on a series of aldehydes and ketones undergoing Prins cyclization, an important synthetic step in pharmaceutical chemistry. We observe a decrease of the second-order rate constant with VSC of the reactant carbonyl stretching groups. We measure an increased activation energy due to VSC, but proportional changes in activation enthalpy and entropy suggest no substantive change in reaction pathway. The addition of common cycloaddition reactions to the stable of VSC-modified chemical reactions is another step towards establishing VSC as a genuine tool for synthetic chemistry.</div>

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