Photoisomerization of a phosphorus-based biradicaloid: Ultrafast dynamics through a conical intersection

2021 ◽  
Author(s):  
Tim Völzer ◽  
Henrik Beer ◽  
Axel Schulz ◽  
Stefan Lochbrunner ◽  
Jonas Bresien
Keyword(s):  
Excited State ◽  
Closed Shell ◽  
Open Shell ◽  
Conical Intersection ◽  
Ultrafast Dynamics ◽  
Pump Probe ◽  
Excited State Dynamics ◽  
Probe Spectroscopy

As previously reported, photoisomerization of the open-shell singlet biradicaloid [TerNP]2CNDmp yields its closed-shell housane-type isomer. In the present study, pump-probe spectroscopy was applied to investigate the excited-state dynamics of the...

Optical, electrochemical, third order nonlinear optical, and excited state dynamics studies of bis(3,5-trifluoromethyl)phenyl-zinc phthalocyanine

RSC Advances ◽  
2015 ◽  
Vol 5 (27) ◽  
pp. 20810-20817 ◽  
Author(s):  
Narra Vamsi Krishna ◽  
Varun Kumar Singh ◽  
Debasis Swain ◽  
Soma Venugopal Rao ◽  
Lingamallu Giribabu
Keyword(s):  
Excited State ◽  
Nonlinear Optical ◽  
Electrochemical Techniques ◽  
Zinc Phthalocyanine ◽  
Third Order ◽  
Pump Probe ◽  
Excited State Dynamics ◽  
Probe Spectroscopy

Synthesis and characterisation of a Zn phthalocyanine substituted with bis(3,5-trifluoromethyl)phenyl groups at peripheral positions by absorption, fluorescence and electrochemical techniques. Excited state dynamics were investigated by fs degenerate pump–probe spectroscopy.

scholarly journals An excited state dynamics driven reaction: wavelength-dependent photoisomerization quantum yields in [Ru(bpy)2(dmso)2]2+

2020 ◽  
Vol 11 (22) ◽  
pp. 5797-5807
Author(s):  
Maksim Y. Livshits ◽  
Lei Wang ◽  
Sebastian B. Vittardi ◽  
Stefan Ruetzel ◽  
Albert King ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Yields ◽  
State Behavior ◽  
Pump Probe ◽  
Excited State Dynamics ◽  
Probe Spectroscopy

We report the excited-state behavior of a simple bis-sulfoxide complex, cis-S,S-[Ru(bpy)2(dmso)2]2+, as investigated by femtosecond pump–probe spectroscopy.

Fluorescence and excited state dynamics of the deprotonated Schiff base retinal in proteorhodopsin

2015 ◽  
Vol 396 (9-10) ◽  
pp. 1109-1115 ◽  
Author(s):  
Elena Bühl ◽  
Markus Braun ◽  
Andrea Lakatos ◽  
Clemens Glaubitz ◽  
Josef Wachtveitl
Keyword(s):  
Schiff Base ◽  
Excited State ◽  
Steady State ◽  
Fluorescence Spectrum ◽  
Uv Light ◽  
Pump Probe ◽  
Time Constants ◽  
Excited State Dynamics ◽  
Steady State Fluorescence ◽  
Probe Spectroscopy

Abstract The UV light absorbing species of proteorhodopsin with deprotonated Schiff base retinal was investigated using steady-state fluorescence and femtosecond pump-probe spectroscopy. Compared to the all-trans retinal with protonated Schiff base, the deprotonated chromophore absorbs at 365 nm and exhibits a blue-shifted fluorescence spectrum. The unusually long-lived excited state decays bi-exponentially with time constants of 8 ps and 130 ps to form a deprotonated 13-cis retinal as the primary photo-product.

Femtosecond excited-state dynamics in chlorosomal carotenoids of the photosynthetic bacterium Chloroflexus aurantiacus revealed by near infrared pump-probe spectroscopy

2021 ◽  
Author(s):  
Andrei Yakovlev ◽  
Alexandra Taisova ◽  
Zoya Fetisova
Keyword(s):  
Excited State ◽  
Near Infrared ◽  
High Efficiency ◽  
Light Harvesting ◽  
Photosynthetic Bacterium ◽  
Chloroflexus Aurantiacus ◽  
Green Bacteria ◽  
Pump Probe ◽  
Excited State Dynamics ◽  
Probe Spectroscopy

In photosynthetic green bacteria, chlorosomes provide light harvesting with high efficiency. Chlorosomal carotenoids (Cars) participate in light harvesting together with the main pigment, bacteriochlorophyll (BChl) c/d/e. In the present work,...

scholarly journals Bottom-up excited state dynamics of two cinnamate-based sunscreen filter molecules

2016 ◽  
Vol 18 (40) ◽  
pp. 28140-28149 ◽  
Author(s):  
Yoann Peperstraete ◽  
Michael Staniforth ◽  
Lewis A. Baker ◽  
Natércia D. N. Rodrigues ◽  
Neil C. Cole-Filipiak ◽  
...  
Keyword(s):  
Excited State ◽  
Bottom Up ◽  
Time Resolved ◽  
Pump Probe ◽  
Excited State Dynamics ◽  
Probe Spectroscopy

We have used time-resolved pump–probe spectroscopy to explore E-MMC's and E-EHMC's excited state dynamics upon UV-B photoexcitation.

Investigation of Local Dynamics on the Sub-micron Scale in Organic Blends Using an Ultrafast Confocal Microscope

2010 ◽  
Vol 1270 ◽  
Author(s):  
Giulia Grancini ◽  
Dario Polli ◽  
Jenny Clark ◽  
Tersilla Virgili ◽  
Giulio Cerullo ◽  
...  
Keyword(s):  
Excited State ◽  
Confocal Microscopy ◽  
Polymer Blends ◽  
Spatial Resolution ◽  
Temporal Resolution ◽  
Electronic States ◽  
Pump Probe ◽  
Peculiar Behaviour ◽  
Spatio Temporal ◽  
Probe Spectroscopy

AbstractWe introduce a novel instrument combining femtosecond pump-probe spectroscopy and confocal microscopy for spatio-temporal imaging of excited-state dynamics of phase-separated polymer blends. Phenomena occurring at interfaces between different materials are crucial for optimizing the device performances, but are poorly understood due to the variety of possible electronic states and processes involved and to their complicated dynamics. Our instrument (with 200-fs temporal resolution and 300-nm spatial resolution) provides new insights into the properties of polymer blends, revealing spatially variable photo-relaxation paths and dynamics and highlighting a peculiar behaviour at the interface between the phase-separated domains.

Pump-probe experiments of the excited state dynamics of GR1 centers in diamond

2021 ◽  
Author(s):  
Shova D. Subedi ◽  
Vladimir V. Fedorov ◽  
Sergey B. Mirov ◽  
Matthew Markham
Keyword(s):  
Excited State ◽  
Pump Probe ◽  
Excited State Dynamics
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