Aparajeo Chattopadhyay

Position

Research Scientist I

Department

NOAA - CSL

Education

Ph.D. Physical Chemistry, Indian Association for the Cultivation of Science, India (Advisor: Prof. Tapas Chakraborty)
M.Sc. Chemistry (Specialization - Physical Chemistry), University of Calcutta, India

Contact

303-497-7581

aparajeo.chattopadhyay@colorado.edu

Publications on the web

ORCID:

0000-0003-0063-6685

Research Interests

Atmospheric chemistry
Biomass burning
Gas kinetics
Photochemistry
Air quality

Current Research

Atmospheric chemistry of biomass burning compounds (mainly furan and phenol derivatives). The studies include measurements of the rate coefficients for the reactions with OH radical, Cl atom and measurements of UV absorption spectra, photolysis quantum yields to estimate atmospheric lifetimes. Reaction product studies are also being carried out in order to understand the details of the reaction mechanism.
Measurement of the infrared spectra, atmospheric lifetimes and global warming potentials (GWPs) of perfluorinated compounds to assess their suitability as replacements of the CFCs and Halon compounds.
Atmospheric chemistry of halogenated compounds found in the arctic region.

View Publications

Chattopadhyay A; Papadimitriou VC; Burkholder JB. (Apr 2023). OH reaction rate coefficients, infrared spectra, and climate metrics for (; E; )‐ and (; Z; )‐ 2‐perfluoroheptene (2‐C; ₇; F; ₁₄; ) and 3‐perfluoroheptene (3‐C; ₇; F; ₁₄; ). International Journal of Chemical Kinetics. 10.1002/kin.21643
Mondal K; Chattopadhyay A; Bhattacharya I; Chatterjee P; Mandal S; Chakraborty T. (Jan 2023). Photooxidation of 2-Pentanone in the Gas Phase: Photo-Products, Reaction Mechanism, OH Reaction Kinetics, and Atmospheric Implication. ACS Earth and Space Chemistry. 10.1021/acsearthspacechem.2c00316
Chattopadhyay A; Assaf E; Finewax Z; Burkholder JB. (Dec 2022). UV absorption spectrum of monochlorodimethyl sulfide (CH3SCH2Cl). Journal of Photochemistry and Photobiology A: Chemistry , 433. 10.1016/j.jphotochem.2022.114214
Chattopadhyay A; Bedjanian Y; Romanias MN; Eleftheriou AD; Melissas VS; Papadimitriou VC; Burkholder JB. (Aug 2022). OH Radical and Chlorine Atom Kinetics of Substituted Aromatic Compounds: 4-chlorobenzotrifluoride (p-ClC₆H₄CF₃). The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory. 10.1021/acs.jpca.2c04455
Mondal K; Biswas S; Chattopadhyay A; Chatterjee P; Chakraborty T. (Aug 2021). Gas-Phase Oxidation of NO2 to HNO3 by Phenol: Atmospheric Implications. ACS Earth and Space Chemistry. 10.1021/acsearthspacechem.1c00167
Chattopadhyay A; Gierczak T; Marshall P; Papadimitriou VC; Burkholder JB. (Feb 2021). Kinetic fall-off behavior for the Cl + Furan-2,5-dione (C4H2O3, maleic anhydride) reaction. Physical Chemistry Chemical Physics , 23(8), 4901-4911. 10.1039/d0cp06402e
Chattopadhyay A; Papadimitriou VC; Marshall P; Burkholder JB. (May 2020). Temperature-dependent rate coefficients for the gas-phase OH + furan-2,5-dione (C4H2O3, maleic anhydride) reaction. International Journal of Chemical Kinetics , 52(10), 623-631. 10.1002/kin.21387
Chattopadhyay A; Samanta M; Mondal K; Chakraborty T. (May 2018). Mid-infrared quantum cascade laser spectroscopy probing of the kinetics of an atmospherically significant radical reaction, CH3O2 + NO2 + M -> CH3O2NO2 + M, in the gas phase. Journal of Chemical Sciences (Bangalore) , 130(5). 10.1007/s12039-018-1451-2
Mukhopadhyay DP; Biswas S; Chattopadhyay A; Chakraborty T. (Apr 2018). Conformational Preference Determined by C-H center dot center dot center dot pi Interaction of an O-H center dot center dot center dot O Hydrogen-Bonded Binary Complex of p-Fluorophenol with 2,5-Dihydrofuran: A Laser-Induced Fluorescence Spectroscopy Study. The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory , 122(15), 3787-3797. 10.1021/acs.jpca.8b01384
Chattopadhyay A; Mondal K; Samanta M; Chakraborty T. (May 2017). Photoisomerization of a small cyclic ketone in the vapor phase. Chemical Physics Letters , 675, 104-110. 10.1016/j.cplett.2017.03.016
Chattopadhyay A; Mondal K; Samanta M; Chakraborty T. (May 2017). Photooxidation of cyclohexanone in simulated atmosphere: A potential source of atmospheric formic acid. Atmospheric Environment , 157, 125-134. 10.1016/j.atmosenv.2017.03.007
Chattopadhyay A; Chatterjee P; Chakraborty T. (Jul 2015). Photo-oxidation of Acetone to Formic Acid in Synthetic Air and Its Atmospheric Implication. The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory , 119(29), 8146-8155. 10.1021/acs.jpca.5b04905
Ghosh AK; Chattopadhyay A; Mukhopadhyay A; Chakraborty T. (Mar 2013). Isomeric effects on fragmentations of crotonaldehyde and methacrolein in low-energy electron-molecule collisions. Chemical Physics Letters , 561, 24-30. 10.1016/j.cplett.2013.01.026