Kvantovaya Elektronika
RUS  ENG    JOURNALS   PEOPLE   ORGANISATIONS   CONFERENCES   SEMINARS   VIDEO LIBRARY   PACKAGE AMSBIB  
General information
Latest issue
Archive
Impact factor
Submit a manuscript

Search papers
Search references

RSS
Latest issue
Current issues
Archive issues
What is RSS



Kvantovaya Elektronika:
Year:
Volume:
Issue:
Page:
Find






Personal entry:
Login:
Password:
Save password
Enter
Forgotten password?
Register


Kvantovaya Elektronika, 2005, Volume 35, Number 8, Pages 756–760 (Mi qe4086)  

This article is cited in 7 scientific papers (total in 7 papers)

Laser applications and other topics in quantum electronics

Deactivation of the S1 state of a water-soluble porphyrin cation in a complex with DNA studied by the method of picosecond absorption spectroscopy

I. V. Sazanovich, V. S. Chirvonyi

Institute of Molecular and Atomic Physics, National Academy of Sciences of Belarus
Full-text PDF (147 kB) Citations (7)
Abstract: The deactivation of the excited S1 state of 5,10,15,20-tetrakis(4-N-methylpyridyl)porphyrin (H2TMPyP4) in a complex with DNA is studied by the methods of kinetic absorption spectroscopy for different concentration ratios r of porphyrin and DNA base pairs. It is found that, when the DNA bound porphyrin is assumed to be in a monomer (non-aggregate) state (r = 1:30), the S1 state of porphyrin excited by high-power picosecond pulses is rapidly deactivated, which is manifested as an additional decay component with the decay time 200–250 ps. This effect is interpreted as singlet–singlet annihilation of excitation indicating the presence of sites on the DNA surface with a higher local concentration of porphyrin molecules. The decrease in the relative content of DNA in solution down to r = 1:3 further accelerates the deactivation of the S1 state of porphyrin and causes the hypsochromic shift of its absorption spectrum due to the formation of stack-like porphyrin aggregates along the DNA surface. It is assumed that the additional component with the decay time 44 ± 7 ps observed in the decay curve of the S1 state is caused by the annihilation of excitation in porphyrin aggregates.
Received: 24.02.2005
English version:
Quantum Electronics, 2005, Volume 35, Issue 8, Pages 756–760
DOI: https://doi.org/10.1070/QE2005v035n08ABEH004086
Bibliographic databases:
Document Type: Article
PACS: 42.62.Be, 42.62.Fi, 87.64.Ni
Language: Russian


Citation: I. V. Sazanovich, V. S. Chirvonyi, “Deactivation of the S1 state of a water-soluble porphyrin cation in a complex with DNA studied by the method of picosecond absorption spectroscopy”, Kvantovaya Elektronika, 35:8 (2005), 756–760 [Quantum Electron., 35:8 (2005), 756–760]
Linking options:
  • https://www.mathnet.ru/eng/qe4086
  • https://www.mathnet.ru/eng/qe/v35/i8/p756
  • This publication is cited in the following 7 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Квантовая электроника Quantum Electronics
     
      Contact us:
     Terms of Use  Registration to the website  Logotypes © Steklov Mathematical Institute RAS, 2024