Electrochemical and photoelectrochemical properties of Rhodamine B

Austin, J. M.; Harrison, I. R.; Quickenden, T. I.

doi:10.1021/j100400a021

Cited by 37 publications

(36 citation statements)

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“…Watanabe et al [24] reported that RhB in a CdS-suspended solution is transformed into N-deethylated rhodamine 110 (Rh110) during visible light irradiation (Scheme 1). This was confirmed photoelectrochemically [25].…”

Section: Introductionsupporting

confidence: 73%

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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Section: Introductionsupporting

confidence: 73%

Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

2013

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“…The oxidation potentials of the nucleobase G and the nucleoside d G in water are 1.53 and 1.19 V ( vs NHE), respectively (21). Although provides in principle the formalism to calculate the change in free energy for the reaction, the fact that the cyclic voltammograms of most dyes are not fully reversible (54–56), and that that potentials are strongly dependent on solvent (21,57,58), makes it difficult to calculate ΔG values with accuracy. A survey of literature reports shows that fluorescent dyes with an excited state reduction potential ( E * red = E A red + E 0,0 ) above approximately 1.5 V ( vs NHE) are quenched efficiently by guanine.…”

Section: Discussionmentioning

confidence: 99%

Probing the Interaction Between Fluorophores and DNA Nucleotides by Fluorescence Correlation Spectroscopy and Fluorescence Quenching^†

Ranjit

Levitus

2012

Photochem & Photobiology

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We have investigated the association interactions between the fluorescent dyes TAMRA, Cy3B and Alexa-546 and the DNA deoxynucleoside monophosphates by means of fluorescence quenching and fluorescence correlation spectroscopy (FCS). The interactions of Cy3B and TAMRA with the nucleotides produce a decrease in the apparent diffusion coefficient of the dyes, which result in a shift toward longer times in the FCS autocorrelation decays. Our results with Cy3B demonstrate the existence of Cy3B-nucleotide interactions that do not affect the fluorescence intensity or lifetime of the dye significantly. The same is true for TAMRA in the presence of dAMP, dCMP and dTMP. In contrast, the diffusion coefficient of Alexa 546 remains practically unchanged even at high concentrations of nucleotide. These results demonstrate that interactions between this dye and the four dNMPs are not significant. The presence of the negatively charged sulfonates and the bulky chlorine atoms in the phenyl group of Alexa 546 possibly prevent strong interactions that are otherwise possible for TAMRA. The characterization of dye-DNA interactions is important in biophysical research because they play an important role in the interpretation of energy transfer experiments, and because they can potentially affect the structure and dynamics of the DNA.

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“…CPE has been used as a working electrode for many biosensor applications due to their simplicity in preparation, easy renewability of surface, low background current, cheapness and above all, biocompatibility [65][66][67]. Rhodamine B is a water soluble cationic dye [68]; whose photoelectrochemical properties have been studied extensively [69].…”

Section: Introductionmentioning

confidence: 99%

Poly(Rhodamine B) modified carbon paste electrode for the selective detection of dopamine

Thomas¹,

Mascarenhas²,

Swamy

2012

Journal of Molecular Liquids

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Electrochemical and photoelectrochemical properties of Rhodamine B

Cited by 37 publications

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Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

Probing the Interaction Between Fluorophores and DNA Nucleotides by Fluorescence Correlation Spectroscopy and Fluorescence Quenching^†

Poly(Rhodamine B) modified carbon paste electrode for the selective detection of dopamine

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Electrochemical and photoelectrochemical properties of Rhodamine B

Cited by 37 publications

References 0 publications

Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

Photoinduced electron transfer in rhodamine B-containing amorphous titania gels

Probing the Interaction Between Fluorophores and DNA Nucleotides by Fluorescence Correlation Spectroscopy and Fluorescence Quenching†

Poly(Rhodamine B) modified carbon paste electrode for the selective detection of dopamine

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Product

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Probing the Interaction Between Fluorophores and DNA Nucleotides by Fluorescence Correlation Spectroscopy and Fluorescence Quenching^†