Room temperature phosphorescence lifetime and quantum yield of erythrosine B and rose bengal in aerobic alkaline aqueous solution

Penzkofer, Alfons; Simmel, Max; Riedl, Dieter

doi:10.1016/j.jlumin.2011.12.030

Cited by 13 publications

(7 citation statements)

References 42 publications

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“…RB 2À is among the few compounds that show phosphorescence in thoroughly degassed solutions at room temperature. 26,30 Fig. S1 and S2 (ESI †) demonstrate that RB 2À exhibits relatively small solvatochromic shifts of both the absorption and fluorescence maxima, as also discussed in the literature.…”

Section: Photophysical Properties Of Rbsupporting

confidence: 77%

“…The redox forms of rose bengal eventually undergo back electron transfer (k ÀeT ; Scheme 1f). The properties and reactivity of the redox forms have already been studied by laser flash photolysis, [6][7][8][9]20,21,[26][27][28][29] pulse radiolysis, 25 and timeresolved EPR. 27 To date, only some of the essential photophysical parameters have been obtained for the individual short-lived intermediates shown in Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

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Photochemistry of rose bengal in water and acetonitrile: a comprehensive kinetic analysis

Ludvíková

Friš

Heger

et al. 2016

Phys. Chem. Chem. Phys.

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The photophysical and photochemical properties of rose bengal (RB) in degassed aqueous and acetonitrile solutions were studied using steady-state and transient absorption spectroscopies. This comprehensive investigation provides detailed information about the kinetics and the optical properties of all intermediates involved: the triplet excited state and the oxidized and reduced forms of RB. A full kinetic description is used to control the concentrations of these intermediates by changing the initial experimental conditions.

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Section: Photophysical Properties Of Rbsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Photochemistry of rose bengal in water and acetonitrile: a comprehensive kinetic analysis

Ludvíková

Friš

Heger

et al. 2016

Phys. Chem. Chem. Phys.

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“…Fluorescence and scattered laser light artifacts were removed from the 1 O 2 signal for aqueous experiments by subtracting a kinetic trace collected from an argon-purged sample. For RB, dark detector counts were subtracted instead of an argon-purged kinetic trace because a large signal was observed under argon purging, likely due to room temperature phosphorescence. − The amount of photoproduced 1 O 2 was determined by fitting the 1 O 2 kinetic traces with an exponential growth and decay equation (eq S1) and integrating the fitted curve to yield the 1 O 2 signal area.…”

Section: Methodsmentioning

confidence: 99%

Dissolved Organic Matter Singlet Oxygen Quantum Yields: Evaluation Using Time-Resolved Singlet Oxygen Phosphorescence

Partanen

Erickson

Latch

et al. 2020

Environ. Sci. Technol.

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Singlet oxygen (1O2) generation quantum yields from chromophoric dissolved organic matter (CDOM) have been reported for many samples over the past 4 decades. Yet even for standardized isolates such as those from the International Humic Substance Society (IHSS), wide-ranging values exist in the literature. In this manuscript, time-resolved 1O2 phosphorescence was used to determine the 1O2 quantum yields (ΦΔ) of a variety of dissolved organic matter (DOM) isolates and natural waters. In general, the 1O2 quantum yield values in this study are in the middle, although below the median of the range of past reported values (e.g., for Suwannee River Natural Organic Matter IHSS isolate: 1.8% vs 0.23–2.89%). Notably, hydrophobic neutral fractions of DOM isolates were found to possess the highest 1O2 quantum yields, an interesting result given that these fractions are not retained in typical humic and fulvic acid isolation procedures that use XAD resins. The excitation wavelength dependence of 1O2 generation from CDOM was also examined, and an approximate linear decrease with longer excitation wavelength was observed. This work advances the understanding of CDOM photoprocesses, especially in relation to wavelength-dependent 1O2 production, which is valuable for assessing real-world environmental behavior.

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“…However, to estimate the contribution of each pathway, we have to consider these data and the triplet lifetime of the photocatalysts (2.4 and 7.0 s, for RB and PN, respectively). [22] The contribution of the three different pathways happening from the 3 PC * can be calculated from equations (eq (1)-( 3)):…”

Section: Type I Versus Type Ii Overall Kinetic Analysismentioning

confidence: 99%

Type I vs Type II photodegradation of pollutants

2018

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Room temperature phosphorescence lifetime and quantum yield of erythrosine B and rose bengal in aerobic alkaline aqueous solution

Cited by 13 publications

References 42 publications

Photochemistry of rose bengal in water and acetonitrile: a comprehensive kinetic analysis

Photochemistry of rose bengal in water and acetonitrile: a comprehensive kinetic analysis

Dissolved Organic Matter Singlet Oxygen Quantum Yields: Evaluation Using Time-Resolved Singlet Oxygen Phosphorescence

Type I vs Type II photodegradation of pollutants

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