Oxygen quenching of acriflavine phosphorescence

Rosenberg, Jerome L.; Humphries, Frederick S.

doi:10.1021/j100861a018

Cited by 9 publications

(1 citation statement)

References 7 publications

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“…Acf monomer absorption band within 444 -453 nm depending on the concentration has been reported [29]. For Acf dimer it has been reported that instead of a single monomer band two bands at around 437 and 470 nm are observed with the intensity of the blue band higher than the other [29].…”

Section: The Uv-vis Absorption and Steady State Fluorescence Spectrosmentioning

confidence: 97%

Effect of nanoclay laponite and pH on the energy transfer between fluorescent dyes

Dey

Bhattacharjee

Chakraborty

et al. 2013

Journal of Photochemistry and Photobiology A: Chemistry

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Abstract:Fluorescence resonance energy transfer (FRET) between two dyes acriflavine (Acf) and rhodamine B (RhB) were investigated in solution and Layer-by-Layer (LbL) self assembled films in presence and absence of clay mineral laponite. UV-Vis absorption and fluorescence spectroscopy studies suggest both the dyes present mainly as monomer in solution and films.Energy transfer occurred from Acf to RhB in solution and LbL films. The energy transfer efficiency increases in presence of clay laponite and the maximum efficiency were 78.17% and 32.54% in clay dispersion and in LbL films respectively. Presence of laponite particles onto LbL film was confirmed by atomic force microscopy investigations with a surface coverage of more than 75%. Energy transfer efficiency was pH sensitive and the energy transfer efficiency varies from 4.5% to 44.45% in mixed dye solution for a change in pH from 3.0 to 12.0. With proper calibration it is possible to use the present system under investigation to sense pH over a wide range of pH from 3.0 to 12.0.

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Section: The Uv-vis Absorption and Steady State Fluorescence Spectrosmentioning

confidence: 97%