Fluorescence lifetimes and quantum yields of ten rhodamine derivatives: Structural effect on emission mechanism in different solvents

Zhang, Xianfu; Zhang, Yakui; Liu, Limin

doi:10.1016/j.jlumin.2013.07.066

Cited by 121 publications

(87 citation statements)

References 58 publications

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“…Time resolved optical studies were performed by following the methodology as described in our earlier work. [33] The fluorescence quantum yield of Rh123 in water was reported 0.89[34]. The Förster resonance energy transfer (FRET) distance between the donor and acceptor (r) was calculated using the following equation: …”

Section: Methodsmentioning

confidence: 99%

Facile synthesis of reduced graphene oxide–gold nanohybrid for potential use in industrial waste-water treatment

Kar

Sardar

Liu

et al. 2016

Science and Technology of Advanced Materials

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Here, we report a facile approach, by the photochemical reduction technique, for in situ synthesis of Au-reduced graphene oxide (Au-RGO) nanohybrids, which demonstrate excellent adsorption capacities and recyclability for a broad range of dyes. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) data confirm the successful synthesis of Au-RGO nanohybrids. The effect of several experimental parameters (temperature and pH) variation can effectively control the dye adsorption capability. Furthermore, kinetic adsorption data reveal that the adsorption process follows a pseudo second-order model. The negative value of Gibbs free energy (ΔG0) confirms spontaneity while the positive enthalpy (ΔH0) indicates the endothermic nature of the adsorption process. Picosecond resolved fluorescence technique unravels the excited state dynamical processes of dye molecules adsorbed on the Au-RGO surface. Time resolved fluorescence quenching of Rh123 after adsorption on Au-RGO nanohybrids indicates efficient energy transfer from Rh123 to Au nanoparticles. A prototype device has been fabricated using Au-RGO nanohybrids on a syringe filter (pore size: 0.220 μm) and the experimental data indicate efficient removal of dyes from waste water with high recyclability. The application of this nanohybrid may lead to the development of an efficient reusable adsorbent in portable water purification.

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Section: Methodsmentioning

confidence: 99%

Facile synthesis of reduced graphene oxide–gold nanohybrid for potential use in industrial waste-water treatment

Kar

Sardar

Liu

et al. 2016

Science and Technology of Advanced Materials

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“…The FQY decreases with increasing concentration of Au-Pd NRs. In other words, addition of Au-Pd NRs into Rh6G results in reduced FQY, as compared with the pure Rh6G for which we have a typical value of 0.95 [15]. This is understood as a result of nonradiative energy transfer between the Rh6G dye and the AuPd NRs.…”

Section: Resultsmentioning

confidence: 72%

“…The Rh6G solution with the concentration 1.0×10 -6 mol/L was taken as a reference. Its absorbance was equal to 0.055, the integrated relative fluorescence intensity was 1.4910 5 and the FQY amounted to 0.95 [15]. Finally, the refractive index of the reference measured with a refractometer 'ATAGA' was equal to 1.3320.…”

Section: Methodsmentioning

confidence: 99%

Studies of concentration dependence of the fluorescent quantum yield from rhodamine 6G and Au�Pd core�shell nanorods, using a response surface methodology

Rammarat¹,

Locharoenrat²,

Yindeesuk³

et al. 2017

Ukr. J. Phys. Opt.

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Abstract. We have applied a response surface approach to study the fluorescence quantum yield (FQY) of rhodamine 6G (Rh6G) mixed with Au-Pd core-shell nanorods (Au-Pd NRs). The FQYs have been measured for the Rh6G concentrations varying from 3.53×10 -7 to 1.70×10 -6 mol/L and the concentrations of Au-Pd NRs from 7.06×10 -6 to 1.36×10 -4 mol/L. Our experimental results testify that the FQY depends notably on the proportions of Rh6G and Au-Pd NRs. A specific relationship between the FQY and the concentrations has also been confirmed by a response surface plot. It is found that the discrepancy between the experiment and the calculations is less than 2%.

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“…Since the measurement of Φ CL requires complex tools, the quantum yield of fluorescence (Φ F ) was calculated instead [39,40].…”

Section: Introductionmentioning

confidence: 99%

Imidazolium-based ionic liquid derivative/CuII complexes as efficient catalysts of the lucigenin chemiluminescence system and its application to H2O2 and glucose detection

et al. 2015

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The effects of six synthetic imidazolium-based ionic liquids (ILs) on the Cu(II)-catalyzed chemiluminescence of lucigenin (Luc-CL) in the pH range 6.0-11 were investigated. Preliminary experiments found that the CL emission was strongly enhanced or inhibited in the presence of the ILs. The degree of enhancement or inhibition of the CL intensity in the presence of each IL was related to the molecular structure of the IL, the medium used, and the pH. The maximum enhancement of the CL intensity was observed at pH 9.0 (amplification factor = 443). This decrease in the pH at which maximum CL enhancement occurred and the substantial signal amplification of the Luc-CL may be related to a strong interaction between Cu(II) and the imidazolium ring of superior ILs at this pH. Additionally, the formation of IL microdomains in semi-aqueous media permitted more solubility of the product yielded by the Luc-CL reaction (N-methylacridone), which could increase the CL intensity. To obtain consistent data on the catalytic efficiency of Cu(II) in the presence of various ILs as well as the corresponding CL emission intensities, fluorescence quantum yields (Φ F) of lucigenin were measured under the same conditions. Comparison of the data pointed to the mechanism that controls the properties of Luc-CL in the presence of the Cu(II)/IL complexes. Based on the catalytic effect of the Cu(II)/IL complex and the measurement of the enzymatically generated H2O2, a novel, simple, and sensitive CL method for determining glucose with a detection limit (LoD) of 6.5 μM was developed. Moreover, this method was satisfactorily applied to the determination of glucose in human serum and urine samples. Graphical Abstract The lucigenin chemiluminescence assay for H2O2 and glucose using imidazolium-based ionic liquid derivatives/Cu(II) complexes as efficient catalysts at pH 9.0.

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Fluorescence lifetimes and quantum yields of ten rhodamine derivatives: Structural effect on emission mechanism in different solvents

Cited by 121 publications

References 58 publications

Facile synthesis of reduced graphene oxide–gold nanohybrid for potential use in industrial waste-water treatment

Facile synthesis of reduced graphene oxide–gold nanohybrid for potential use in industrial waste-water treatment

Studies of concentration dependence of the fluorescent quantum yield from rhodamine 6G and Au�Pd core�shell nanorods, using a response surface methodology

Imidazolium-based ionic liquid derivative/CuII complexes as efficient catalysts of the lucigenin chemiluminescence system and its application to H2O2 and glucose detection

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