1
|
Tudorovskaya M, Minns RS, Kirrander A. Effects of probe energy and competing pathways on time-resolved photoelectron spectroscopy: the ring-opening of 1,3-cyclohexadiene. Phys Chem Chem Phys 2018; 20:17714-17726. [DOI: 10.1039/c8cp02397b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Photoelectron spectra for the ring-opening dynamics of 1,3-cyclohexadiene are studied using a model based on quantum molecular dynamics and the Dyson orbital approach.
Collapse
Affiliation(s)
| | | | - Adam Kirrander
- EaStCHEM
- School of Chemistry
- University of Edinburgh
- Edinburgh
- UK
| |
Collapse
|
2
|
Smith BD, Spears KG, Sension RJ. Probing the Biexponential Dynamics of Ring-Opening in 7-Dehydrocholesterol. J Phys Chem A 2016; 120:6575-81. [DOI: 10.1021/acs.jpca.6b06967] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Broc D. Smith
- Department of Chemistry and
Department of Physics, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109-1055, United States
| | - Kenneth G. Spears
- Department of Chemistry and
Department of Physics, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109-1055, United States
| | - Roseanne J. Sension
- Department of Chemistry and
Department of Physics, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109-1055, United States
| |
Collapse
|
3
|
Vazquez FX, Talapatra S, Sension RJ, Geva E. The Entropic Origin of Solvent Effects on the Single Bond cZt-tZt Isomerization Rate Constant of 1,3,5-cis-Hexatriene in Alkane and Alcohol Solvents: A Molecular Dynamics Study. J Phys Chem B 2014; 118:7869-77. [DOI: 10.1021/jp5002644] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francisco X. Vazquez
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Surma Talapatra
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Roseanne J. Sension
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Eitan Geva
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| |
Collapse
|
4
|
Arruda BC, Peng J, Smith B, Spears KG, Sension RJ. Photochemical Ring-Opening and Ground State Relaxation in α-Terpinene with Comparison to Provitamin D3. J Phys Chem B 2013; 117:4696-704. [DOI: 10.1021/jp308391u] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brenden C. Arruda
- Department of Chemistry
and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Jian Peng
- Department of Chemistry
and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Broc Smith
- Department of Chemistry
and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Kenneth G. Spears
- Department of Chemistry
and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109,
United States
| | - Roseanne J. Sension
- Department of Chemistry
and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109,
United States
| |
Collapse
|
5
|
Arruda BC, Smith B, Spears KG, Sension RJ. Ultrafast ring-opening reactions: a comparison of α-terpinene, α-phellandrene, and 7-dehydrocholesterol with 1,3-cyclohexadiene. Faraday Discuss 2013; 163:159-71; discussion 243-75. [DOI: 10.1039/c3fd20149j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
6
|
Petrović VS, Siano M, White JL, Berrah N, Bostedt C, Bozek JD, Broege D, Chalfin M, Coffee RN, Cryan J, Fang L, Farrell JP, Frasinski LJ, Glownia JM, Gühr M, Hoener M, Holland DMP, Kim J, Marangos JP, Martinez T, McFarland BK, Minns RS, Miyabe S, Schorb S, Sension RJ, Spector LS, Squibb R, Tao H, Underwood JG, Bucksbaum PH. Transient X-ray fragmentation: probing a prototypical photoinduced ring opening. PHYSICAL REVIEW LETTERS 2012; 108:253006. [PMID: 23004597 DOI: 10.1103/physrevlett.108.253006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Indexed: 05/23/2023]
Abstract
We report the first study of UV-induced photoisomerization probed via core ionization by an x-ray laser. We investigated x-ray ionization and fragmentation of the cyclohexadiene-hexatriene system at 850 eV during the ring opening. We find that the ion-fragmentation patterns evolve over a picosecond, reflecting a change in the state of excitation and the molecular geometry: the average kinetic energy per ion fragment and H(+)-ion count increase as the ring opens and the molecule elongates. We discuss new opportunities for molecular photophysics created by optical pump x-ray probe experiments.
Collapse
Affiliation(s)
- Vladimir S Petrović
- Department of Physics, Stanford University, Stanford, California 94305, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
|
8
|
White JL, Kim J, Petrović VS, Bucksbaum PH. Ultrafast ring opening in 1,3-cyclohexadiene investigated by simplex-based spectral unmixing. J Chem Phys 2012; 136:054303. [DOI: 10.1063/1.3681258] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
|
9
|
Deb S, Weber PM. The Ultrafast Pathway of Photon-Induced Electrocyclic Ring-Opening Reactions: The Case of 1,3-Cyclohexadiene. Annu Rev Phys Chem 2011; 62:19-39. [DOI: 10.1146/annurev.physchem.012809.103350] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The photochemically induced electrocyclic ring-opening reaction of 1,3-cyclohexadiene to 1,3,5-hexatriene serves as a prototype for many important reactions in chemistry and in biological systems. Based on experimental and computational studies, a detailed picture of the reaction has now emerged: Excitation to the Franck-Condon region places the molecule on a steeply repulsive part of the 1B potential energy surface, which propels the molecule in exactly the conrotatory direction that conforms to the Woodward-Hoffmann rules of orbital symmetry. Bypassing a cusp in a symmetry-breaking direction, the wave packet enters the 2A state within 55 fs. It continues to move directly toward the 2A/1A conical intersection, where it crosses in approximately 80 fs to the ground state. This article summarizes the published experimental and theoretical work to describe the current understanding of the reaction while pointing to important questions that remain to be addressed.
Collapse
Affiliation(s)
| | - Peter M. Weber
- Department of Chemistry, Brown University, Providence, Rhode Island 02912;
| |
Collapse
|
10
|
Tang KC, Rury A, Orozco MB, Egendorf J, Spears KG, Sension RJ. Ultrafast electrocyclic ring opening of 7-dehydrocholesterol in solution: The influence of solvent on excited state dynamics. J Chem Phys 2011; 134:104503. [DOI: 10.1063/1.3557054] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
|
11
|
Tang KC, Sension RJ. The influence of the optical pulse shape on excited state dynamics in provitamin D3. Faraday Discuss 2011; 153:117-29; discussion 189-212. [DOI: 10.1039/c1fd00035g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
12
|
Marzec KM, Reva I, Fausto R, Malek K, Proniewicz LM. Conformational Space and Photochemistry of α-Terpinene. J Phys Chem A 2010; 114:5526-36. [DOI: 10.1021/jp100770v] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. M. Marzec
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland, and Departament of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| | - I. Reva
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland, and Departament of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| | - R. Fausto
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland, and Departament of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| | - K. Malek
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland, and Departament of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| | - L. M. Proniewicz
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland, and Departament of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| |
Collapse
|
13
|
|
14
|
Johnson PJM, Prokhorenko VI, Miller RJD. Stable UV to IR supercontinuum generation in calcium fluoride with conserved circular polarization states. OPTICS EXPRESS 2009; 17:21488-21496. [PMID: 19997389 DOI: 10.1364/oe.17.021488] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The supercontinuum generated with a linearly polarized near-IR (775 nm) pump in rotated calcium fluoride is shown to have intrinsic intensity and polarization modulations. To mask the rotation of the crystal plate, we circularly polarize the pump and find greatly improved output parameters for the generated white light: intensity fluctuations of 0.5% limited only by pump laser stability, and a circular polarization state-matching that of the pump-over the entire visible spectrum. This polarization conservation allows the return of the supercontinuum to a linear polarization state or to a pair of linearly polarized beams with correlated intensity fluctuations. We were also able to extend the supercontinuum source deep into the ultraviolet with a frequency doubled (387 nm) pump, to serve as an new source to probe the region where most molecular photochemistry occurs.
Collapse
Affiliation(s)
- Philip J M Johnson
- Institute for Optical Sciences, Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
| | | | | |
Collapse
|
15
|
Pye CC, Poirier RA, Burnell DJ, Klapstein D. An ab initio study of 5,6-disubstituted 1,3-cyclohexadienes. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.05.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
16
|
Control of retinal isomerization in bacteriorhodopsin in the high-intensity regime. Proc Natl Acad Sci U S A 2009; 106:10896-900. [PMID: 19564608 DOI: 10.1073/pnas.0904589106] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A learning algorithm was used to manipulate optical pulse shapes and optimize retinal isomerization in bacteriorhodopsin, for excitation levels up to 1.8 x 10(16) photons per square centimeter. Below 1/3 the maximum excitation level, the yield was not sensitive to pulse shape. Above this level the learning algorithm found that a Fourier-transform-limited (TL) pulse maximized the 13-cis population. For this optimal pulse the yield increases linearly with intensity well beyond the saturation of the first excited state. To understand these results we performed systematic searches varying the chirp and energy of the pump pulses while monitoring the isomerization yield. The results are interpreted including the influence of 1-photon and multiphoton transitions. The population dynamics in each intermediate conformation and the final branching ratio between the all-trans and 13-cis isomers are modified by changes in the pulse energy and duration.
Collapse
|
17
|
Kotur M, Weinacht T, Pearson BJ, Matsika S. Closed-loop learning control of isomerization using shaped ultrafast laser pulses in the deep ultraviolet. J Chem Phys 2009; 130:134311. [DOI: 10.1063/1.3103486] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
|
18
|
Greenfield M, McGrane SD, Moore DS. Control of cis-Stilbene Photochemistry Using Shaped Ultraviolet Pulses. J Phys Chem A 2009; 113:2333-9. [DOI: 10.1021/jp801758v] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Greenfield
- Dynamic and Energetic Materials Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - S. D. McGrane
- Dynamic and Energetic Materials Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - D. S. Moore
- Dynamic and Energetic Materials Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| |
Collapse
|
19
|
Kosma K, Trushin SA, Fuß W, Schmid WE. Cyclohexadiene ring opening observed with 13 fs resolution: coherent oscillations confirm the reaction path. Phys Chem Chem Phys 2009; 11:172-81. [DOI: 10.1039/b814201g] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
20
|
Carroll EC, White JL, Florean AC, Bucksbaum PH, Sension RJ. Multiphoton Control of the 1,3-Cyclohexadiene Ring-Opening Reaction in the Presence of Competing Solvent Reactions. J Phys Chem A 2008; 112:6811-22. [DOI: 10.1021/jp8013404] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Elizabeth C. Carroll
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - James L. White
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - Andrei C. Florean
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - Philip H. Bucksbaum
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| | - Roseanne J. Sension
- FOCUS Center, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109-1040
| |
Collapse
|
21
|
Florean AC, Carroll EC, Spears KG, Sension RJ, Bucksbaum PH. Optical control of excited-state vibrational coherences of a molecule in solution: The influence of the excitation pulse spectrum and phase in LD690. J Phys Chem B 2007; 110:20023-31. [PMID: 17020390 DOI: 10.1021/jp0627628] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spectral and phase shaping of femtosecond laser pulses is used to selectively excite vibrational wave packets on the ground (S0) and excited (S1) electronic states in the laser dye LD690. The transient absorption signals observed following excitation near the peak of the ground-state absorption spectrum are characterized by a dominant 586 cm(-1) vibrational mode. This vibration is assigned to a wave packet on the S0 potential energy surface. When the excitation pulse is tuned to the blue wing of the absorption spectrum, a lower frequency 568 cm(-1) vibration dominates the response. This lower frequency mode is assigned to a vibrational wave packet on the S1 electronic state. The spectrum and phase of the excitation pulse also influence both the dephasing of the vibrational wave packet and the amplitude profiles of the oscillations as a function of probe wavelength. Excitation by blue-tuned, positively chirped pulses slows the apparent dephasing of the vibrational coherences compared with a transform-limited pulse having the same spectrum. Blue-tuned negatively chirped excitation pulses suppress the observation of coherent oscillations in the ground state.
Collapse
Affiliation(s)
- A C Florean
- FOCUS Center, Randall Laboratory, 450 Church Street, University of Michigan, Ann Arbor, Michigan 48109-1040, USA
| | | | | | | | | |
Collapse
|
22
|
Montgomery MA, Meglen RR, Damrauer NH. General Method for Reducing Adaptive Laser Pulse-Shaping Experiments to a Single Control Variable. J Phys Chem A 2007; 111:5126-9. [PMID: 17530749 DOI: 10.1021/jp073132o] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Adaptive laser pulse shaping has proven to be expeditious for discovering laser pulse shapes capable of manipulating complex systems. However, if adaptive control is to be a valuable interrogative technique that informs physical and chemical research, methods that make it possible to infer mechanistic information from experimental results must be developed. Here, we demonstrate multivariate statistical analysis to extract a single control variable from results of a 137-parameter adaptive laser pulse-shaping optimization of multiphoton electronic excitation in a ruthenium(II) coordination complex in solution. We show that this single variable can be used to linearly manipulate the observed fitness, which is determined by the ratio of molecular emission to second harmonic generation of the laser pulse, over the range explored during the adaptive optimization. Further, manipulation of this variable reveals the latent control mechanism. For this system, that mechanism entails focusing the second harmonic power spectrum of the laser field in a spectral region where the probability of two-photon absorption by the molecule is also large. The statistical tools developed are general and will help elucidate control mechanisms in future adaptive pulse-shaping experiments.
Collapse
Affiliation(s)
- Matthew A Montgomery
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, USA
| | | | | |
Collapse
|