Singlet-triplet annihilation of singlet oxygen and triplet xanthene dye molecules in liquid solutions

Bryukhanov, V. V.; Ketsle, G. A.; Laurinas, V.Ch.; Levshin, L. V.; Muldakhmetov, Z. M.

doi:10.1007/bf00660047

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…These curves are identical after their normalizing (curve 4). This result is unexpected and contradics to work [3] but the experimental curves have similar dependence ( fig. 1) in which oxygen pressure above samples is 0.5 and 0.8 atm.…”

Section: Numerical Results and Their Discussionsupporting

confidence: 78%

“…The next analysis will show accurate parameters means. Earlier Bryukhanov with coauthors [3] had shown that maximum of long-term fluorescence rises and shifts to short time region in polymer media when oxygen concentration increases. However, biological samples differ for viscosity not only but metabolic processes are also.…”

Section: Numerical Results and Their Discussionmentioning

confidence: 98%

“…Nowadays, it is considered that lifetime of triplet states of fluorescein derivatives (erythrosine, eosine and rose bengal) located in cells depends on oxygen and peptide concentration in medium primarily because it is a basic quenchers of triplet states. So, mean of erythrosine lifetime may be from 4 μs in oxygen containing medium [3] to 700 [4] μs in polymethylmethacrylate where oxygen concentration is a little. Interaction of fluoresceine derivative with peptide had also investigated in detail [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Long-term fluorescence of erythrosine in alive mammalian cells

Maryakhina

2016

JBPE

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Abstract. Investigation of triplet states of probes molecules located in cells and tissues is used for research of pathological processes included cancer development due to high sensitivity of triplet states lifetime to surround medium. In the work the long-term fluorescence of erythrosine located in alive mammalian cells has been analyzed by mathematical simulation. The model considers all basic processes of relaxation of probe triplet states in biological media. It is obtained that signal intensity and its form depends on oxygen concentration and viscosity of cells cytoplasm in which the dye diffuses. Interaction of erythrosine with the variety of extinguishers (included immobilization process into peptides molecules) does not impact on signal of the delayed fluorescence. Their concentration impact on cell viscosity mean only. The most important extinguisher is molecular oxygen impacting on signal. The correlation between theoretical and experimental results let to consider that the model is adequate.

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Section: Numerical Results and Their Discussionsupporting

confidence: 78%

Section: Numerical Results and Their Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Long-term fluorescence of erythrosine in alive mammalian cells

Maryakhina

2016

JBPE

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“…Thus, the registered DF kinetics curve is the overlap of summed signals from different reactions, each of which contains information about the medium properties. It was experimentally shown that the DF maximum shifts toward shorter time periods with increasing pressure on the samples [8].…”

Section: Results and Their Discussionmentioning

confidence: 98%

Pathology development stage and its influence on the delayed fluorescence kinetics of molecular probes

Maryakhina

Letuta

2013

Laser Phys.

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This paper describes regularity of the delayed fluorescence kinetics changes of xanthene dyes in the cancer cells received from tumors of different diameter. It shows that the rate constant of bimolecular reactions (singlet-triplet T− 1 g (O 2 ) and triplet-triplet annihilations) as well as thermoactive fluorescence decrease with increasing pathological process development stage. It could be a result of both more expressed cancer cell hypoxia and a change in cytoplasm viscosity.

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“…Особенности АЗФ различных ФС достаточно подробно изучены для небиологических систем [25][26][27][28][29], однако в живых клетках и тканях такой тип длительной люминесценции исследован очень фрагментарно [30][31][32]. Использование АЗФ имеет ряд преимуществ.…”

Section: Introductionunclassified

Мониторинг Изменения Содержания Кислорода В Тканях По Кинетике Замедленной Флуоресценции Экзогенных Красителей

Летута¹,

Пашкевич²,

Алиджанов³

et al. 2019

Журнал Технической Физики

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The dynamics of oxygen consumption during photodynamic processes and its subsequent restoration in malignant tumors and healthy tissues of mice were studied in vitro by kinetics of long-term luminescence of xanthene dyes. It was shown that to estimate changes in tissue oxygen tension, specific type of delayed fluorescence can be used which caused by singlet-triplet annihilation of singlet oxygen and a sensitizer in triplet state. In tumors under pulse excitation of sensitizers, reversible quenching of delayed fluorescence was observed, which is associated with a decrease in the tissue oxygen tension during photodynamic processes. Method for visualizing the restoration of the initial oxygen level in tissues after photodynamic action is proposed.

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Singlet-triplet annihilation of singlet oxygen and triplet xanthene dye molecules in liquid solutions

Cited by 5 publications

References 4 publications

Long-term fluorescence of erythrosine in alive mammalian cells

Long-term fluorescence of erythrosine in alive mammalian cells

Pathology development stage and its influence on the delayed fluorescence kinetics of molecular probes

Мониторинг Изменения Содержания Кислорода В Тканях По Кинетике Замедленной Флуоресценции Экзогенных Красителей

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