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.

Optical, electrochemical, third-order nonlinear optical, and excited state dynamics studies of thio-zinc phthalocyanine

2014 ◽  
Vol 18 (04) ◽  
pp. 305-315 ◽  
Author(s):  
Debasis Swain ◽  
Varun K. Singh ◽  
Narra V. Krishna ◽  
L. Giribabu ◽  
S. Venugopal Rao
Keyword(s):  
Optical Properties ◽  
Excited State ◽  
Nonlinear Optical ◽  
Radiative Decay ◽  
Nonlinear Optical Properties ◽  
Zinc Phthalocyanine ◽  
Closed Aperture ◽  
Third Order ◽  
Pump Probe ◽  
Excited State Dynamics

Zinc phthalocyanine with S-aryl groups at α-positions have been synthesized and its optical, emission, electrochemical and third-order nonlinear optical properties were investigated. Both the Soret and Q-bands were red-shifted and obeyed Beer–Lambert's law. Electrochemical properties indicated that both oxidation and reduction processes were ring centered. Emission spectra were recorded in different solvents and the fluorescence yields obtained were in the range of 0.02 while time-resolved fluorescence data revealed lifetimes of typically few ns. Excited state dynamics in this novel thio-zinc phthalocyanine molecule has been investigated using femtosecond (fs) degenerate pump-probe spectroscopy. Nonlinear optical properties of this molecule have been examined using the Z-scan technique with picosecond (ps) and fs pulses. Both open and closed aperture Z-scan curves were recorded with ~2 ps/~150 fs laser pulses at a wavelength of 800 nm and nonlinear optical coefficients were extracted from both the studies. Degenerate pump-probe data performed at 600 nm suggested a single long lifetime of ~300 ps, possibly originating from the non-radiative decay of S1 state.

Excited state dynamics of the third-order nonlinear optical response in diphenylhexatriene

1993 ◽  
Author(s):  
D. C. Rodenberger ◽  
Weidong Chen ◽  
Rui-Fang Shi ◽  
Qihou L. Zhou ◽  
Anthony F. Garito
Keyword(s):  
Excited State ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Third Order ◽  
Excited State Dynamics ◽  
The Third

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.

scholarly journals Optoelectronic, femtosecond nonlinear optical properties and excited state dynamics of a triphenyl imidazole induced phthalocyanine derivative

RSC Advances ◽  
2019 ◽  
Vol 9 (63) ◽  
pp. 36726-36741 ◽  
Author(s):  
Somdatta Bhattacharya ◽  
Chinmoy Biswas ◽  
Sai Santosh Kumar Raavi ◽  
Jonnadula Venkata Suman Krishna ◽  
Devulapally Koteshwar ◽  
...  
Keyword(s):  
Optical Properties ◽  
Excited State ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Zinc Phthalocyanine ◽  
Excited State Dynamics ◽  
Phthalocyanine Derivative

A novel zinc phthalocyanine derivative PBIPC was synthesized by incorporating a triphenyl imidazole moiety at its peripheral positions.

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.

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