Multi-molar CO2 capture beyond the direct Lewis acid–base interaction mechanism

2020 ◽  
Vol 22 (20) ◽  
pp. 11354-11361 ◽  
Author(s):  
Chenchen Li ◽  
Dongmei Lu ◽  
Chao Wu
Keyword(s):  
Proton Transfer ◽  
Lewis Acid ◽  
Co2 Capture ◽  
Transfer Process ◽  
Interaction Mechanism ◽  
Multiple Site ◽  
Acid Base ◽  
Base Interaction ◽  
Proton Transfer Process ◽  
Acid Base Interaction

Competing with the Lewis acid-base reactions, proton transfer related interactions dominate the multi-molar CO2 capture in three typical multiple-site ILs. For ammonium-based ILs, the proton transfer process is feasible only with the help of CO2 molecule.

scholarly journals SPECIFIC NATURE OF ACID-BASE INTERACTION OF OCTA(4-TERT-BUTYLPHENYL)TETRAPYRAZINOPORPHYRAZINE WITH ORGANIC PROTON-ACCEPTOR MOLECULES IN BENZENE

2021 ◽  
Vol 64 (3) ◽  
pp. 33-40
Author(s):  
Oleg A. Petrov ◽  
Aleksandr S. Semeykin ◽  
Mariya V. Shilovskaya ◽  
Tatiana V. Lyubimova
Keyword(s):  
Proton Transfer ◽  
Proton Acceptor ◽  
Base System ◽  
Excess Charge ◽  
Hydrogen Atoms ◽  
Acid Base ◽  
Base Interaction ◽  
Base Equilibrium ◽  
Acid Base Equilibrium ◽  
Acid Base Interaction

The reaction of acid-base interaction of octa(4-tert-butylphenyl)tetrapyrazinophosphyrazine with pyridine, 2-methylpyridine, morhpoline, pipyridine, n-butylamine, tert-butylamine, diethylamine, triethylamine and dimethylsulfoxide in benzene was investigated. It is shown that the researched porphyrazine forms kinetically stable proton transfer complexes with pyridine, 2-methylpyridine, morpholine and dimethylsulfoxide. In benzene-base system an acid-base equilibrium between the molecular form of octa(4-tert-butylphenyl)tetrapyrazinoporphyrazine and its proton transfer complex was established. The interaction of substituted tetrapyrazinoporphyrazine with morpholine in benzene was revealed to be a kinetically controllable process which occurs with low reaction rate and high values of activation energy. Such values are not inherent to most of relatively simple liquid-phase acid-base systems. The kinetic equation of the process was found, and, based on the spectral changes accompanying the reaction, a cheme of two-stage process of proton transfer of NH-groups of octa(4-tert-butylphenyl)tetrapyrazinoporphyrazine to morpholine in benzene was proposed. A possible structure of proton transfer complex of octa(4-tert-butylphenyl)tetrapyrazinoporphyrazine with organic bases is shown. In these complexes the inner hydrogen atoms of the cycle, bonded with base molecules, lie under and above the plane of the molecule, and the proton transfer from acid to base is limited either by the H-complex or the ion-ion associates constituting an H-bonded ion pair. Depending on the proton accepting tendency of the base, the acid-base equilibrium can shift towards or away from the more or less polarized structure. It was revealed that in benzene - n-butylamine (tri-butylamine, diethylamine, triethylamine, pipyridine) system the acid-base interaction involving octa(4- tert-butylphenyl)tetrapyrazinoporphyrazine occurs incredibly fast, with rates not measurable by standard spectrophotography methods. The forming proton transfer complexes are highly labile due to concurrent proton reaction occurring, leading to the formation of dianion form of octa(4- tert-butylphenyl)tetrapyrazinoporphyrazine. This form undergoes spontaneous dissolution into low-molecular colorless products due to the lack of compensation of excess charge in the macrocycle.

Lewis acids in situ modulate pyridazine-imine Ni catalysed ethylene (co)polymerisation

2019 ◽  
Vol 43 (34) ◽  
pp. 13630-13634 ◽  
Author(s):  
Guohong Wang ◽  
Min Li ◽  
Wenmin Pang ◽  
Min Chen ◽  
Chen Tan
Keyword(s):  
Electron Density ◽  
Lewis Acid ◽  
Lewis Acids ◽  
Acid Base ◽  
Base Interaction ◽  
Acid Base Interaction

The Lewis acid-base interaction between B(iii) Lewis acids and the pyridazine moiety reduced the electron density from the Ni center and in situ modulated the pyridazine-imine nickel catalyzed ethylene (co)polymerisation.

scholarly journals An all solid-state Li ion battery composed of low molecular weight crystalline electrolyte

RSC Advances ◽  
2020 ◽  
Vol 10 (15) ◽  
pp. 8780-8789 ◽  
Author(s):  
Prerna Joshi ◽  
Raman Vedarajan ◽  
Anjaiah Sheelam ◽  
Kothandaraman Ramanujam ◽  
Bernard Malaman ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solid State ◽  
Lewis Acid ◽  
Low Molecular Weight ◽  
Li Ion Battery ◽  
Acid Base ◽  
Base Interaction ◽  
Li Ion ◽  
Acid Base Interaction

A non-polymer crystalline organoboron electrolyte results in the formation of nano-channels for directional conduction of Li ions, owing to presence of boron, allowing Lewis acid–base interaction.

scholarly journals Front Cover: Nature and Strength of Lewis Acid/Base Interaction in Boron and Nitrogen Trihalides (Chem. Asian J. 23/2020)

2020 ◽  
Vol 15 (23) ◽  
pp. 3913-3913
Author(s):  
Daniela Rodrigues Silva ◽  
Lucas Azevedo Santos ◽  
Matheus P. Freitas ◽  
Célia Fonseca Guerra ◽  
Trevor A. Hamlin
Keyword(s):  
Lewis Acid ◽  
Acid Base ◽  
Base Interaction ◽  
Front Cover ◽  
Acid Base Interaction
Sign in / Sign up

Export Citation Format

Share Document