NDLI: Excitonic Coupling and Femtosecond Relaxation of Zinc Porphyrin Oligomers Linked with Triazole Bridge: Dynamics and Modeling.

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Excitonic Coupling and Femtosecond Relaxation of Zinc Porphyrin Oligomers Linked with Triazole Bridge: Dynamics and Modeling.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Tyurin, Vladimir Bukreev, Alexey Polevaya, Yuliya Beletskaya, Irina Gostev, Fedor Umansky, Stanislav Nadtochenko, Victor Mikhailov, Konstantin Shelaev, Ivan
Description	Author Affiliation: Bukreev A ( Semenov Institute of Chemical Physics RAS , Moscow 117977, Russia.); Mikhailov K ( Semenov Institute of Chemical Physics RAS , Moscow 117977, Russia.); Shelaev I ( Semenov Institute of Chemical Physics RAS , Moscow 117977, Russia.); Gostev F ( Semenov Institute of Chemical Physics RAS , Moscow 117977, Russia.); Polevaya Y ( Frumkin Institute of Physical Chemistry and Electrochemistry , Moscow 119071, Russia.); Tyurin V ( Frumkin Institute of Physical Chemistry and Electrochemistry , Moscow 119071, Russia.); Beletskaya I ( Frumkin Institute of Physical Chemistry and Electrochemistry , Moscow 119071, Russia.); Umansky S ( Semenov Institute of Chemical Physics RAS , Moscow 117977, Russia.); Nadtochenko V ( Semenov Institute of Chemical Physics RAS , Moscow 117977, Russia.)
Abstract	The synthesis of new zinc porphyrin oligomers linked by a triazole bridge was carried out via 'click' reaction. A split in the porphyrin oligomer B-band was observed. It was considered as evidence of exciton-excitonic coupling. The relaxation of excited states in Q-band porphyrin oligomers was studied by the femtosecond laser spectroscopy technique with a 20 fs pump pulse. The transient oscillations of two B-band excitonic peaks have a π-radian shift. For explanation of the coherent oscillation, a theoretical model was developed. The model considered the combination of the exciton-excitonic coupling between porphyrin rings in dimer and weak exciton-vibronic coupling in one porphyrin ring. By varying the values of the structural parameters of porphyrins (the strength values of this couplings and measure of symmetry breaking), we obtained correspondence between the experimental data (phase shift and amplitudes of the spectrum oscillations) and the predictions of the model developed here.
ISSN	10895639
Issue Number	12
Journal	The Journal of Physical Chemistry A
Volume Number	120
e-ISSN	15205215
Language	English
Publisher	American Chemical Society (United States)
Publisher Date	2016-03-31
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical chemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Physical and Theoretical Chemistry

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