Visible photodissociation of the CO2 dimer cation: fast and slow dissociation dynamics in the excited state

2019 ◽  
Vol 21 (6) ◽  
pp. 3083-3091 ◽  
Author(s):  
Yuji Nakashima ◽  
Kenichi Okutsu ◽  
Keita Fujimoto ◽  
Yuri Ito ◽  
Manabu Kanno ◽  
...  
Keyword(s):  
Excited State ◽  
Angular Distributions ◽  
Ion Imaging ◽  
Imaging Experiment ◽  
Dissociation Dynamics ◽  
Slow Dissociation ◽  
532 Nm

Velocity and angular distributions of photofragment CO2+ ions produced from mass-selected (CO2)2+ at 532 nm excitation were observed in an ion imaging experiment.

Photophysics and reverse saturable absorption of cationic dinuclear iridium(iii) complexes bearing fluorenyl-tethered 2-(quinolin-2-yl)quinoxaline ligands

2021 ◽  
Author(s):  
Cuifen Lu ◽  
Taotao Lu ◽  
Peng Cui ◽  
Svetlana Kilina ◽  
Wenfang Sun
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Triplet Excited State ◽  
532 Nm

Dinuclear Ir(iii) complexes tethered by fluorenyl motif exhibited weak 1,3MLCT/1,3LLCT absorption at >500 nm, dual phosphorescence, broad triplet excited-state absorption, and reverse saturable absorption at 532 nm.

Picosecond investigations of the excited-state transition at 532 nm in King's complex [(C5H5)Fe(CO)]4 and synthesized analogs

1994 ◽  
Vol 98 (1) ◽  
pp. 216-221 ◽  
Author(s):  
G. R. Allan ◽  
S. J. Rychnovsky ◽  
C. H. Venzke ◽  
Thomas F. Boggess ◽  
Lee Tutt
Keyword(s):  
Excited State ◽  
State Transition ◽  
532 Nm

Photodissociation of CO−3: Product kinetic energy measurements as a probe of excited state potential surfaces and dissociation dynamics

1990 ◽  
Vol 92 (10) ◽  
pp. 5935-5943 ◽  
Author(s):  
Joseph T. Snodgrass ◽  
Coleen M. Roehl ◽  
Petra A. M. van Koppen ◽  
William E. Palke ◽  
Michael T. Bowers
Keyword(s):  
Excited State ◽  
Kinetic Energy ◽  
Potential Surfaces ◽  
Dissociation Dynamics ◽  
State Potential

Two-dimensional ion-imaging of fragment angular distributions after photolysis of state-selected and oriented triatomic molecules

1997 ◽  
Author(s):  
J. M. Teule ◽  
M. H. Hilgeman ◽  
M. H. M. Janssen ◽  
D. W. Chandler ◽  
C. A. Taatjes ◽  
...  
Keyword(s):  
Angular Distributions ◽  
Two Dimensional ◽  
Ion Imaging ◽  
Triatomic Molecules

Observation of multi-channel non-adiabatic dynamics in aniline derivatives using time-resolved photoelectron imaging

2016 ◽  
Vol 194 ◽  
pp. 185-208 ◽  
Author(s):  
Magdalena M. Zawadzki ◽  
Marco Candelaresi ◽  
Lisa Saalbach ◽  
Stuart W. Crane ◽  
Martin J. Paterson ◽  
...  
Keyword(s):  
Excited State ◽  
Angular Distributions ◽  
Relaxation Dynamics ◽  
Photoelectron Imaging ◽  
Time Resolved ◽  
Valence States ◽  
Ultimate Fate ◽  
Site Selective ◽  
Photoelectron Angular Distributions ◽  
Electronic Character

We present results from a recent time-resolved photoelectron imaging (TRPEI) study investigating the non-adiabatic relaxation dynamics of N,N-dimethylaniline (N,N-DMA) and 3,5-dimethylaniline (3,5-DMA) following excitation at 240 nm. Analysis of the experimental data is supported by ab initio coupled-cluster calculations evaluating excited state energies and the evolution of several excited state physical properties as a function of N–H/N–CH3 bond extension – a critical reaction coordinate. The use of site-selective methylation brings considerable new insight to the existing body of literature concerning photochemical dynamics in the related system aniline at similar excitation wavelengths. The present work also builds on our own previous investigations in the same species at 250 nm. The TRPEI method provides highly differential energy- and angle-resolved data and, in particular, the temporal evolution of the photoelectron angular distributions afforded by the imaging approach offers much of the new dynamical information. In particular, we see no clear evidence of the second excited 2ππ* state non-adiabatically coupling to the lower-lying S1(ππ*) state or the mixed Rydberg/valence S2(3s/πσ*) state. This, in turn, potentially raises some unresolved questions about the overall nature of the dynamics operating in these systems, especially in regard to the 2ππ* state's ultimate fate. More generally, the findings for the aromatic systems N,N-DMA and 3,5-DMA, taken along with our recent TRPEI results for several aliphatic amine species, highlight interesting questions about the nature of electronic character evolution in mixed Rydberg-valence states as a function of certain key bond extensions and the extent of system conjugation. We begin exploring these ideas computationally for a systematically varied series of tertiary amines.

Dissociation dynamics of acetylene Rydberg states as a function of excited state lifetime

1998 ◽  
Vol 109 (13) ◽  
pp. 5231-5246 ◽  
Author(s):  
P. Löffler ◽  
E. Wrede ◽  
L. Schnieder ◽  
J. B. Halpern ◽  
W. M. Jackson ◽  
...  
Keyword(s):  
Excited State ◽  
Rydberg States ◽  
Excited State Lifetime ◽  
Dissociation Dynamics

INVESTIGATION ON NONLINEAR TRANSMISSION PROPERTY OF EXCITED STATE PROTON TRANSFER MOLECULE 2-(2′-HYDROXYPHENYL)BENZOXAZOLE

2000 ◽  
Vol 09 (03) ◽  
pp. 309-314 ◽  
Author(s):  
DONG XIAO ◽  
GUILAN ZHANG ◽  
HAIYAN WANG ◽  
GUOQING TANG ◽  
WENJU CHEN
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Transmission Property ◽  
Nonlinear Transmission ◽  
Ultrafast Optical ◽  
Excited State Proton Transfer ◽  
532 Nm ◽  
Proton Transfer Process

Nonlinear transmission property of excited state proton transfer molecule 2-(2′-hydroxyphenyl)benzoxazole was investigated at 355 nm and 532 nm using picosecond laser pulses. The experiment result shows that the transmissivity of 2-(2′-hydroxyphenyl)benzoxazole is nonlinear at 355 nm but it is linear at 532 nm. The nonlinear transmissivity of 2-(2′-hydroxyphenyl)benzoxazole originates from the larger nonlinearity of tautomer formed in excited state proton transfer process. Therefore 2-(2′-hydroxyphenyl)benzoxazole might be used as ultrafast optical amplitude limit material.

Measurement of the Excited-State Molecular Polarizability of C60

1994 ◽  
Vol 359 ◽  
Author(s):  
N. Tang ◽  
R. W. Hellwarth ◽  
J. P. Partanen
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Benzene Solution ◽  
Excited State Absorption ◽  
Molecular Polarizability ◽  
Wave Mixing ◽  
Pump Probe ◽  
Probe Experiment ◽  
Pump Probe Experiment ◽  
532 Nm

ABSTRACTWe use ∼30 ps pulses at 532 nm to measure the complex excited-state molecular polarizability αe in a C60/benzene solution. We determine the imaginary part of αe by measuring the excited-state absorption cross-section in a pump-probe experiment. In a degenerate-four-wave-mixing (DFWM) experiment, we find that in delayed probing of the complex index gratings formed by ∼30 ps pulses, the thermal and the excited-state polarizability changes both contribute to these transient gratings.

Time-sliced ion imaging study of I2 and I2+ photolysis at 532 nm

2005 ◽  
Vol 7 (10) ◽  
pp. 2151 ◽  
Author(s):  
Chen-Lin Liu ◽  
Hsu-Chen Hsu ◽  
Chi-Kung Ni
Keyword(s):  
Imaging Study ◽  
Ion Imaging ◽  
532 Nm
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