Surjendu Bhattacharyya
YOU?
Author Swipe
View article: Imaging transient molecular configurations in UV-excited diiodomethane
Imaging transient molecular configurations in UV-excited diiodomethane Open
Femtosecond structural dynamics of diiodomethane (CH2I2) triggered by ultraviolet (UV) photoabsorption at 290 and 330 nm are studied using time-resolved coincident Coulomb explosion imaging driven by a near-infrared probe pulse. We map the…
View article: Imaging Valence Electron Rearrangement in a Chemical Reaction Using Hard X-Ray Scattering
Imaging Valence Electron Rearrangement in a Chemical Reaction Using Hard X-Ray Scattering Open
We have observed the signatures of valence electron rearrangement in photoexcited ammonia using ultrafast hard x-ray scattering. Time-resolved x-ray scattering is a powerful tool for imaging structural dynamics in molecules because of the …
View article: Imaging a light-induced molecular elimination reaction with an X-ray free-electron laser
Imaging a light-induced molecular elimination reaction with an X-ray free-electron laser Open
Tracking the motion of individual atoms during chemical reactions represents a severe experimental challenge, especially if several competing reaction pathways exist or if the reaction is governed by the correlated motion of more than two …
View article: Direct observation of ultrafast symmetry reduction during internal conversion of 2-thiouracil using Coulomb explosion imaging
Direct observation of ultrafast symmetry reduction during internal conversion of 2-thiouracil using Coulomb explosion imaging Open
View article: Imaging the Photochemistry of Cyclobutanone using Ultrafast Electron Diffraction: Experimental Results
Imaging the Photochemistry of Cyclobutanone using Ultrafast Electron Diffraction: Experimental Results Open
We investigated the ultrafast structural dynamics of cyclobutanone following photoexcitation at $λ=200$ nm using gas-phase megaelectronvolt ultrafast electron diffraction. Our investigation complements the simulation studies of the same pr…
View article: Direct observation of ultrafast symmetry reduction during internal conversion of 2-thiouracil using Coulomb explosion imaging
Direct observation of ultrafast symmetry reduction during internal conversion of 2-thiouracil using Coulomb explosion imaging Open
The photochemistry of heterocyclic molecules plays a decisive role for processes and applications like DNA photo-protection from UV damage and organic photocatalysis. The photochemical reactivity of heterocycles is determined by the redist…
View article: Ultrafast structural dynamics of UV photoexcited <i>cis</i>,<i>cis</i>-1,3-cyclooctadiene observed with time-resolved electron diffraction
Ultrafast structural dynamics of UV photoexcited <i>cis</i>,<i>cis</i>-1,3-cyclooctadiene observed with time-resolved electron diffraction Open
An ultrafast electron diffraction study of the structural dynamics of cis , cis -1,3-cyclooctadiene has identified a ring stretching distortion as a new reaction coordinate as the molecule transitions from the excited state back to the gro…
View article: Quantitative x-ray scattering of free molecules
Quantitative x-ray scattering of free molecules Open
Advances in x-ray free electron lasers have made ultrafast scattering a powerful method for investigating molecular reaction kinetics and dynamics. Accurate measurement of the ground-state, static scattering signals of the reacting molecul…
View article: An atom-by-atom view of a photochemical ring opening reaction
An atom-by-atom view of a photochemical ring opening reaction Open
Photoinduced transformations of organic ring molecules play a crucial role in numerous physical, chemical and biological processes, ranging from biosynthesis of vitamin D to optical switching in molecular electronics. Although the developm…
View article: Simultaneous imaging of vibrational, rotational, and electronic wave packet dynamics in a triatomic molecule
Simultaneous imaging of vibrational, rotational, and electronic wave packet dynamics in a triatomic molecule Open
Light-induced molecular dynamics often involve the excitation of several electronic, vibrational, and rotational states. Since the ensuing electronic and nuclear motion determines the pathways and outcomes of photoinduced reactions, our ab…
View article: Differentiating Three-Dimensional Molecular Structures Using Laser-Induced Coulomb Explosion Imaging
Differentiating Three-Dimensional Molecular Structures Using Laser-Induced Coulomb Explosion Imaging Open
Coulomb explosion imaging (CEI) with x-ray free electron lasers has recently been shown to be a powerful method for obtaining detailed structural information of gas-phase planar ring molecules [R. Boll et al., X-ray multiphoton-induced Cou…
View article: Valence shell electronically excited states of norbornadiene and quadricyclane
Valence shell electronically excited states of norbornadiene and quadricyclane Open
The absolute photoabsorption cross sections of norbornadiene (NBD) and quadricyclane (QC), two isomers with chemical formula C7H8 that are attracting much interest for solar energy storage applications, have been measured from threshold up…
View article: Monitoring the Evolution of Relative Product Populations at Early Times during a Photochemical Reaction
Monitoring the Evolution of Relative Product Populations at Early Times during a Photochemical Reaction Open
Identifying multiple rival reaction products and transient species formed during ultrafast photochemical reactions and determining their time-evolving relative populations are key steps toward understanding and predicting photochemical out…
View article: Ultrafast electronic relaxation pathways of the molecular photoswitch quadricyclane
Ultrafast electronic relaxation pathways of the molecular photoswitch quadricyclane Open
View article: Exploring the ultrafast and isomer-dependent photodissociation of iodothiophenes <i>via</i> site-selective ionization
Exploring the ultrafast and isomer-dependent photodissociation of iodothiophenes <i>via</i> site-selective ionization Open
The dissociation dynamics of UV pumped iodothiophene molecules are investigated using velocity map ion imaging, in combination with site-selective extreme ultraviolet ionization of the iodine atom.
View article: Monitoring the evolution of relative product populations at early times during a photochemical reaction
Monitoring the evolution of relative product populations at early times during a photochemical reaction Open
Identifying multiple rival reaction products and transient species formed during ultrafast photochemical reactions and determining their time-evolving relative populations are key steps towards understanding and predicting photochemical ou…
View article: Time-Resolved Coulomb Explosion Imaging Unveils Ultrafast Ring Opening of Furan
Time-Resolved Coulomb Explosion Imaging Unveils Ultrafast Ring Opening of Furan Open
Following the changes in molecular structure throughout the entirety of a chemical reaction with atomic resolution is a long-term goal in femtochemistry. Although the development of a plethora of ultrafast technique has enabled detailed in…
View article: Hydrogen migration in inner-shell ionized halogenated cyclic hydrocarbons
Hydrogen migration in inner-shell ionized halogenated cyclic hydrocarbons Open
View article: Strong-Field-Induced Coulomb Explosion Imaging of Tribromomethane
Strong-Field-Induced Coulomb Explosion Imaging of Tribromomethane Open
The Coulomb explosion of tribromomethane (bromoform, CHBr3) induced by 28 fs near-infrared laser pulses is investigated by three-dimensional coincidence ion momentum imaging. We focus on the fragmentation into three, four, and f…
View article: Two-body dissociation of formic acid following double ionization by ultrafast laser pulses
Two-body dissociation of formic acid following double ionization by ultrafast laser pulses Open
We studied the fragmentation of planar formic acid (HCOOH) molecules following their double ionization by intense ultrashort laser pulses. Deuterium tagging (i.e., HCOOD) combined with coincidence momentum imaging measurements of all fragm…
View article: Two- and three-body fragmentation of multiply charged tribromomethane by ultrafast laser pulses
Two- and three-body fragmentation of multiply charged tribromomethane by ultrafast laser pulses Open
This article provides mechanistic insight into the two- and three-body fragmentation dynamics of CHBr 3 after strong-field ionization and discusses the possible isomerization of CHBr 3 to BrCHBr–Br (iso-CHBr 3 ) prior to the fragmentation.
View article: Strong-field induced fragmentation and isomerization of toluene probed by ultrafast femtosecond electron diffraction and mass spectrometry
Strong-field induced fragmentation and isomerization of toluene probed by ultrafast femtosecond electron diffraction and mass spectrometry Open
We investigate the fragmentation and isomerization of toluene molecules induced by strong-field ionization with a femtosecond near-infrared laser pulse.
View article: Differentiating and Quantifying Gas-Phase Conformational Isomers Using Coulomb Explosion Imaging
Differentiating and Quantifying Gas-Phase Conformational Isomers Using Coulomb Explosion Imaging Open
Conformational isomerism plays a crucial role in defining the physical and chemical properties and biological activity of molecules ranging from simple organic compounds to complex biopolymers. However, it is often a significant challenge …
View article: Real-time tracking of the entangled pathways in the multichannel photodissociation of acetaldehyde
Real-time tracking of the entangled pathways in the multichannel photodissociation of acetaldehyde Open
Unraveling the entangled multi-channel dissociation pathways by a two-dimensional, time and product pair-correlation, measurement and ab initio calculations.