Rhodamine B Equilibria

Ramette, Richard W.; Sandell, E. B.

doi:10.1021/ja01600a017

Cited by 288 publications

(169 citation statements)

References 2 publications

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“…A shift may be explained by solvent polarity or acid -base equilibria. Based on the fact that protonation of the carboxylic group generally does not lead to a band shift larger than about 3 nm [16,26], we conclude that the shift indicates a change of polarity in the microenvironment of the dye with respect to aqueous solution.…”

Section: Variation Of the Amino Function In Rhodamine Stainsmentioning

confidence: 85%

Staining diatoms with rhodamine dyes: control of emission colour in photonic biocomposites

Kucki

Fuhrmann‐Lieker

2011

J. R. Soc. Interface.

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The incorporation of rhodamine dyes in the cell wall of diatoms Coscinodiscus granii and Coscinodiscus wailesii for the production of luminescent hybrid nanostructures is investigated. By systematic variation of the substitution pattern of the rhodamine core, we found that carbonic acids are considerably better suited than esters because of their physiological compatibility. The amino substitution pattern that controls the optical properties of the chromophore has no critical influence on dye uptake and incorporation, thus a variety of biocomposites with different emission maxima can be prepared. Applications in biomineralization studies as well as in materials science are envisioned.

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Section: Variation Of the Amino Function In Rhodamine Stainsmentioning

confidence: 85%

Staining diatoms with rhodamine dyes: control of emission colour in photonic biocomposites

Kucki

Fuhrmann‐Lieker

2011

J. R. Soc. Interface.

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“…Figure 3 shows the effect of visible light irradiation time on the spectrum of RhB in the silica and titania gels, In the silica gel film, the absorption peak at approximately 559 nm before light irradiation was shifted to higher energy, to 543nm and its intensity gradually decreased with increasing irradiation time. It is suggested that the RhB cation was transformed to the lactone form via the zwitterion and then decomposed as a result of oxidative photolysis [34,35]. In the titania gel film, the spectrum was somewhat broader than that in the silica gel film because the RhB cation interacted with the -TiOH group.…”

Section: Resultsmentioning

confidence: 99%

Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

2013

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Amorphous titania gel films containing the dye rhodamine B (RhB) were prepared by a sol−gel method without heating. The RhB existed in the films as the RhB cation, which was transformed into the rhodamine 110 (Rh110) cation; its xanthene skeleton then decomposed during irradiation with visible light. This process was induced by electron transfer from the RhB cation to the titania gel matrix, because formation of the RhB radical on loss of an electron caused sequential dissociation of the N-ethyl groups. During irradiation with visible light a photocurrent was observed in electrodes coated with the RhB-containing titania gel and immersed in an I 2 -LiI electrolyte. This photocurrent resulted from electron injection from the LUMO level of the dye into conduction band-like states of the titania gel. Because of its effective electron supply the electrolyte inhibited dissociation of the N-ethyl groups of RhB.

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“…7 The rhodamine spirolactam form is basically colorless and non-fluorescent, while its metal induced ring-opened amide form has strong absorption within the visible range and usually displays strong fluorescence emission. Recently, utilization of rhodamine spirolactam ring-opening process for the detection of metal ions has been well documented.…”

Section: B6mentioning

confidence: 99%

A Quinoline-thiooxorhodamine Conjugate for Fluorescent Hg²⁺Recognition in Aqueous Media and Living Cells

Tang¹,

Wen²,

Dai³

et al. 2014

Bulletin of the Korean Chemical Society

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Rhodamine B Equilibria

Cited by 288 publications

References 2 publications

Staining diatoms with rhodamine dyes: control of emission colour in photonic biocomposites

Staining diatoms with rhodamine dyes: control of emission colour in photonic biocomposites

Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

A Quinoline-thiooxorhodamine Conjugate for Fluorescent Hg²⁺Recognition in Aqueous Media and Living Cells

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Rhodamine B Equilibria

Cited by 288 publications

References 2 publications

Staining diatoms with rhodamine dyes: control of emission colour in photonic biocomposites

Staining diatoms with rhodamine dyes: control of emission colour in photonic biocomposites

Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

A Quinoline-thiooxorhodamine Conjugate for Fluorescent Hg2+Recognition in Aqueous Media and Living Cells

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A Quinoline-thiooxorhodamine Conjugate for Fluorescent Hg²⁺Recognition in Aqueous Media and Living Cells