Slower processes of the ultrafast photo-isomerization of an azobenzene observed by IR spectroscopy

Koller, Florian O.; Sobotta, Constanze; Schrader, Tobias E.; Cordes, Thorben; Schreier, Wolfgang; Sieg, A.; Gilch, Peter

doi:10.1016/j.chemphys.2007.06.048

Cited by 19 publications

(26 citation statements)

References 20 publications

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“…Whereas in the IR only minor differences between the PR samples (wt pD 6.4, wt pD 9.2, D97N pD 7.4) are found, the data of the Vis-pump ⁄ Vis-probe experiment differ significantly. Thus both data sets contain complementary information and are therefore not directly comparable to each other, in accordance with other joint Vis-IR studies (25,26).…”

Section: Discussionsupporting

confidence: 65%

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy^†

Verhoefen

Neumann

Weber

et al. 2009

Photochem & Photobiology

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Femtosecond time‐resolved spectroscopy in the visible and IR range was utilized to study the primary reaction dynamics of the proteorhodopsin (PR) D97N mutant in comparison with wild type PR at different pH values. The analysis of the data obtained in the mid‐IR closely resembles the results for wild type PR. The observation of the first ground state intermediate K is initially obscured by a complex reaction scheme of vibrational relaxation and heating effects, but its spectral signature clearly emerges at long delay times. In the visible range, a biexponential decay of the excited state within 30 ps and the formation of the K photoproduct is observed. The decay time constants derived for the D97N mutant in D2O are slightly larger than in H2O due to H/D exchange. This kinetic isotope effect is even less pronounced than for wild type PR at pH 6. These results support the current notion of a pH dependent hydrogen bonding network in the retinal binding pocket of PR and a weaker interaction between the retinal Schiff base and the counter ion complex compared to bacteriorhodopsin.

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Section: Discussionsupporting

confidence: 65%

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy^†

Verhoefen

Neumann

Weber

et al. 2009

Photochem & Photobiology

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“…(For the determination of cooling times in the way it is done here and its flaws, see discussion in ref. 54.) Indeed, bi-modal decay patterns in that time range have been observed for the cooling of related molecules.…”

Section: Transient Absorption Spectroscopymentioning

confidence: 80%

The ketene intermediate in the photochemistry of ortho-nitrobenzaldehyde

Laimgruber

Schmierer

Gilch

et al. 2008

Phys. Chem. Chem. Phys.

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The first intermediate of the photochemical transformation of ortho-nitrobenzaldehyde to ortho-nitrosobenzoic acid in acetonitrile solvent has been characterized by femtosecond spectroscopy and time-dependent density functional theory (TDDFT) calculations. Femtosecond stimulated Raman spectroscopy (FSRS) indicates that this intermediate adopts a ketene structure. This assignment is supported by the TDDFT results. A kinetic analysis of FSRS and transient absorption data points to two channels for the formation of the ketene. For the predominating first channel the formation takes 0.4 ps. For the second channel it is much slower and takes 220 ps. We assign the first channel to a reaction via an excited singlet state. The second one might involve a triplet state.

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“…Azobenzene compounds have attracted a great deal of interest in recent years due to their intriguing photophysical properties and versatile applications in photo-responsive materials [1][2][3][4][5][6], supramolecular structure construction [7][8][9][10] and non-linear optics [11,12]. They can undergo reversible trans-to-cis transformation by illumination with UV/visible light, and the inverse cis-to-trans reaction can be achieved by irradiation with a different wavelength UV/visible light or by thermal relaxation.…”

Section: Introductionmentioning

confidence: 99%

Photophysics and nonlinear absorption of 4,4′-diethynylazobenzene derivatives terminally capped with substituted aromatic rings

Liu

Chang

et al. 2012

Journal of Photochemistry and Photobiology A: Chemistry

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Slower processes of the ultrafast photo-isomerization of an azobenzene observed by IR spectroscopy

Cited by 19 publications

References 20 publications

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy^†

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy^†

The ketene intermediate in the photochemistry of ortho-nitrobenzaldehyde

Photophysics and nonlinear absorption of 4,4′-diethynylazobenzene derivatives terminally capped with substituted aromatic rings

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Slower processes of the ultrafast photo-isomerization of an azobenzene observed by IR spectroscopy

Cited by 19 publications

References 20 publications

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy†

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy†

The ketene intermediate in the photochemistry of ortho-nitrobenzaldehyde

Photophysics and nonlinear absorption of 4,4′-diethynylazobenzene derivatives terminally capped with substituted aromatic rings

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Product

Resources

About

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy^†

Primary Reaction Dynamics of Proteorhodopsin Mutant D97N Observed by Femtosecond Infrared and Visible Spectroscopy^†