Photodynamic activity of different dyes

Menezes, Priscila Fernanda Campos de; Bernal, Cláudia; Imasato, Hidetake; Bagnato, Vanderlei Salvador; Perussi, Janice Rodrigues

doi:10.1134/s1054660x07040251

Cited by 34 publications

(32 citation statements)

References 10 publications

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“…Formation of the dye-CB complex was ascertained by UV, 1 H NMR and ESI-MS spectroscopies. No changes in the optical spectra are observed when CB [5] or CB [6] is added to these solutions. The absence of host-guest complexes between CB [5] and CB [6] is also supported by 1 H NMR data.…”

Section: Dye Complexation By Cbs (Ph 55)mentioning

confidence: 77%

“…No changes in the optical spectra are observed when CB [5] or CB [6] is added to these solutions. The absence of host-guest complexes between CB [5] and CB [6] is also supported by 1 H NMR data. In contrast, addition of CB [7] or CB [8] …”

Section: Dye Complexation By Cbs (Ph 55)mentioning

confidence: 77%

“…Due to their intense fluorescence emission, tricyclic condensed heterocycles having amino substituents are widely used in dye lasers, [1,2] singlet oxygen photosensitizers, [3,4] agents for photodynamic therapy [5,6] and as photosensitizers in the construction of solar cells. [7][8][9][10] Some of these dyes bear a positive charge delocalized throughout the structure.…”

Section: Introductionmentioning

confidence: 99%

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Complexation and Fluorescence of Tricyclic Basic Dyes Encapsulated in Cucurbiturils

2008

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Tricyclic basic dyes (proflavine, acridine orange, pyronine, pyronine Y, oxonine, thionine and methylene blue) often form one-to-one or two-to-one complexes with CB[7] and CB[8], respectively. In the case of pyronine Y, the complexes with CB[7] and CB[8] have a one-to-one and three-to-one stoichiometry, respectively. The binding constants for CB[7] complexes range from 3.07x10(6) to 1.70x10(7) m(-1). In the case of CB[8], the association constant varies between 3.24x10(13) and 2.50x10(16) m(-2). Overall, these binding constants are four orders of magnitude higher than those reported for the same dyes in beta and gamma-cyclodextrins. Formation of the host-guest complexes leads to an increase in the fluorescence quantum yields in the case of CB[7], while the dimeric or trimeric dye encapsulated in CB[8] are remarkably less fluorescent than the same dye in diluted solutions.

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Section: Dye Complexation By Cbs (Ph 55)mentioning

confidence: 77%

Section: Dye Complexation By Cbs (Ph 55)mentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

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Complexation and Fluorescence of Tricyclic Basic Dyes Encapsulated in Cucurbiturils

2008

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“…Um estudo comparativo da citotoxicidade do AM no escuro em células normais e tumorais verificou que esse corante é mais citotóxico em células tumorais 58,59 . O fato de que tanto células MDR como cepas de bactérias resistentes a múltiplos antibióticos também são sensíveis ao corante 6 sugere que AM pode ser usado como um agente quimioterapêutico.…”

Section: Fenotiazínicosunclassified

Inativação fotodinâmica de microrganismos

Perussi¹

2007

Quím. Nova

113

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“…This dependence was also shown by other authors. [6][7][8] The obtained result can be explained by immobilization of the dye in biological structures. Since photosensitizer can be injected in either unmovable or movable medium, rate of immobilization processes depend on medium rate.…”

Section: Introductionmentioning

confidence: 99%

Change of photosensitizer fluorescence at its diffusion in viscous liquid flow

Maryakhina

Gun’kov

2016

J. Innov. Opt. Health Sci.

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In this paper, the mathematical model of distribution of the injected compound in biological liquid°ow has been described. It is considered that biological liquid contains a few phases such as water, peptides and cells. The injected compound (for example, photosensitizer) can interact with peptides and cells. At the time, viscosity of the biological liquid depends on pathology present in organism. The obtained distribution of the compound connects on changes of its°uorescence spectra which are registered during°uorescent diagnostics of tumors. It is obtained that the curves do not have monotonic nature. There is a sharp curves decline in the¯rst few seconds after injection. Intensivity of curves rises after decreasing. It is especially pronounced for wavelength 590 nm and 580 nm (near the \transparency window" of biological tissues). Time of in-°e ction point shifts from 8.4 s to 6.9 s for longer wavelength. However, di®erence between curves is little for di®erent viscosity means of the biological liquid. Thus, additional pathology present in organism does not impact to the results of in vivo biomedical investigations.

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Photodynamic activity of different dyes

Cited by 34 publications

References 10 publications

Complexation and Fluorescence of Tricyclic Basic Dyes Encapsulated in Cucurbiturils

Complexation and Fluorescence of Tricyclic Basic Dyes Encapsulated in Cucurbiturils

Inativação fotodinâmica de microrganismos

Change of photosensitizer fluorescence at its diffusion in viscous liquid flow

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