Ultrafast dynamics of Chromone phototransformation by means of transient absorption spectroscopy

2018 ◽  
Author(s):  
A.O. Ayt ◽  
V.A. Barachevsky ◽  
S. V. Gagarskiy ◽  
K. Oberhofer ◽  
Ch. Brunner ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Ultrafast Dynamics

scholarly journals Ultrafast dynamics of the photo-excited hemes b and cn in the cytochrome b6f complex

2017 ◽  
Vol 19 (4) ◽  
pp. 3287-3296
Author(s):  
Rachna Agarwal ◽  
Adrien A. P. Chauvet
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Broad Band ◽  
Transient Absorption Spectroscopy ◽  
Ultrafast Dynamics ◽  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
B6f Complex

The dynamics of hemes b and cn within the cytochrome b6f complex are investigated by means of ultrafast broad-band transient absorption spectroscopy.

scholarly journals Conical intersection dynamics of pyrimidine nucleosides tracked with sub-20-fs UV pulses

2019 ◽  
Vol 205 ◽  
pp. 10007
Author(s):  
Rocío Borrego-Varillas ◽  
Artur Nenov ◽  
Lucia Ganzer ◽  
Aurelio Oriana ◽  
Irene Conti ◽  
...  
Keyword(s):  
Excited State ◽  
Numerical Simulations ◽  
Ab Initio ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Conical Intersection ◽  
Ultrafast Dynamics ◽  
Conical Intersections ◽  
Pyrimidine Nucleosides

By combining transient absorption spectroscopy with sub-20-fs UV pulses and ab initio numerical simulations we follow the ultrafast dynamics in pyrimidine nucleosides and visualize the passage through conical intersections presiding excited state deactivation.

scholarly journals Ultrafast dynamics of highly constrained azobenzene macrocycles

2019 ◽  
Vol 205 ◽  
pp. 09002
Author(s):  
Chavdar Slavov ◽  
Chong Yang ◽  
Luca Schweighauser ◽  
Andreas H. Heindl ◽  
Tim Stauch ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Strong Dependence ◽  
Molecular Properties ◽  
Geometric Constraints ◽  
Transient Absorption Spectroscopy ◽  
Ultrafast Dynamics

The ultrafast photoisomerization of model azobenzene macrocycles was studied by transient absorption spectroscopy. Our results reveal a strong dependence of the dynamics and the overall molecular properties on the geometric constraints and the intramolecular strain.

scholarly journals Revealing excited states dynamics in cross-linked covalent hybrids of graphene and diketopyrrolopyrrole oligomers via ultrafast transient absorption spectroscopy

2020 ◽  
Vol 238 ◽  
pp. 07007
Author(s):  
Aaron M. Ross ◽  
Meng Zheng ◽  
Michele Maggini ◽  
Fabio Marangi ◽  
Giulio Cerullo ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Excited States ◽  
Absorption Spectroscopy ◽  
Transient Response ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Ultrafast Dynamics ◽  
Charge Energy ◽  
Ultrafast Charge Transfer

We report on ultrafast dynamics in cross-linked covalent hybrids of graphene and diketopyrrolopyrrole (TDPP) oligomers. Comparisons between non-polymerizing (EXG-TDPP) and polymerizing (c-EXG-TDPP) hybrids show that charge/energy transfer occurs faster than 50 ps in EXGTDPP, while the c-EXG-TDPP system shows quenching within 18 ps. The transient response of c-EXGTDPP is completely quenched (>99%), while in EXG-TDPP full quenching occurs after 1.39 ns. Photocurrent studies of c-EXG-TDPP films show IPCE > 2%, indicating ultrafast charge transfer between TDPP and graphene.

Ultrafast dynamics of two copper bis-phenanthroline complexes measured by x-ray transient absorption spectroscopy

2017 ◽  
Vol 50 (15) ◽  
pp. 154006 ◽  
Author(s):  
Matthew S Kelley ◽  
Megan L Shelby ◽  
Michael W Mara ◽  
Kristoffer Haldrup ◽  
Dugan Hayes ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Ultrafast Dynamics ◽  
X Ray

scholarly journals Probing the ultrafast dynamics in nanomaterial complex systems by femtosecond transient absorption spectroscopy

2016 ◽  
Vol 4 ◽  
Author(s):  
Qun Zhang ◽  
Yi Luo
Keyword(s):  
Complex Systems ◽  
Absorption Spectroscopy ◽  
Ultrafast Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Ultrafast Dynamics ◽  
Time Resolved ◽  
The Past ◽  
Femtosecond Transient Absorption ◽  
Consistent Information

Over the past decade the integration of ultrafast spectroscopy with nanoscience has greatly propelled the development of nanoscience, as the key information gleaned from the mechanistic studies with the assistance of ultrafast spectroscopy enables a deeper understanding of the structure–function interplay and various interactions involved in the nanosystems. This mini-review presents an overview of the recent advances achieved in our ultrafast spectroscopy laboratory that address the ultrafast dynamics and related mechanisms in several representative nanomaterial complex systems by means of femtosecond time-resolved transient absorption spectroscopy. We attempt to convey instructive, consistent information regarding the important processes, pathways, dynamics, and interactions involved in the nanomaterial complex systems, most of which exhibit excellent performance in photocatalysis.

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