Role of post-CCSD (T) corrections in predicting the energetics and kinetics of the OH˙+ O 3 reaction

PK Rai, P Kumar - Physical Chemistry Chemical Physics, 2022 - pubs.rsc.org
The present work investigates the OH˙+ O3 reaction by means of chemical kinetics and
quantum chemical calculations. To estimate the reaction barrier height and reaction energy …

How Do the Position and Number of Methyl Substituents Affect the Photochemical Process of Criegee Intermediate? Trajectory Surface-Hopping Dynamics of Four …

X Geng, Y Li, J Yang, F Liu - The Journal of Physical Chemistry A, 2024 - ACS Publications
Electronic-structure calculations combined with nonadiabatic trajectory surface-hopping
(TSH) dynamic simulations were carried out on two alkenyl-substituted Criegee …

Effect of water on the oxidation of CO by a Criegee intermediate

A Kumar, S Mallick, P Kumar - Physical Chemistry Chemical Physics, 2020 - pubs.rsc.org
The present work employs the CCSD (T)/CBS//M06-2X/aug-cc-pVTZ level of theory to
investigate the effect of a water monomer and dimer on the oxidation of carbon-monoxide by …

Novel Triple-Oxygen Isotope Study Indicates Unprecedented Ozone–Particulate Interaction Pathways in Atmospheric Pollution Chemistry

MC Liang, CH Huang, MH Thiemens… - ACS …, 2025 - ACS Publications
Ozone plays a fundamental role in the chemistry of the atmosphere, mediating oxidation
reactions in phases and at phase boundaries. Here, we investigate the least-explored solid …

Water as a catalyst in the reaction of nitrous acid (HONO) and Criegee intermediate (CH 2 OO)

VJ Anand, V Kumar, A Kumar, P Kumar - Physical Chemistry Chemical …, 2025 - pubs.rsc.org
The present work employs the CCSD (T)/CBS//M06-2X/aug-cc-pVTZ level of theory to
investigate the effect of a water monomer (WM) and dimer (WD) on the oxidation of nitrous …

Nitrous acid (HONO) as a sink of the simplest Criegee intermediate in the atmosphere

A Kumar, S Mallick, P Kumar - Physical Chemistry Chemical Physics, 2022 - pubs.rsc.org
In the present work, we have investigated the reaction of nitrous acid with the simplest
Criegee intermediate using chemical kinetics and quantum chemical calculations. It was …

The reaction of N2O with the Criegee intermediate: A theoretical study

S Mallick, P Kumar - Computational and Theoretical Chemistry, 2020 - Elsevier
Nitrous oxide (N 2 O) is slowly becoming a severe threat to the ozone layer. Therefore, there
is a renewed interest in the atmospheric chemistry of N 2 O. In present work, we have …

Accurate determination of reaction energetics and kinetics of the HO 2˙+ O 3→ OH˙+ 2O 2 reaction

PK Rai, P Kumar - Physical Chemistry Chemical Physics, 2023 - pubs.rsc.org
In the present work, we have studied the HO2˙+ O3→ HO˙+ 2O2 reaction using chemical
kinetics and quantum chemical calculations. We have employed the post-CCSD (T) method …

The effect of ammonia and formic acid on the oxidation of CO via a simple Criegee intermediate

A Kumar, P Kumar - Physical Chemistry Chemical Physics, 2021 - pubs.rsc.org
In the present work, we have investigated the effect of catalysts (ammonia, formic acid,
ammonia dimer, and ammonia water complex) on the oxidation of CO via a simple Criegee …

Substituent Dependence on the Reactions of Criegee Intermediates with Carbon Dioxide and Carbon Monoxide

K Takahashi - ChemPlusChem, 2023 - Wiley Online Library
Abstract Criegee intermediates (CIs), R1R2COO, are active molecules produced in the
atmosphere from the ozonolysis of alkenes. Here, we systematically evaluated the reactivity …