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What is the quantum yield of Rhodamine B?

What is the quantum yield of Rhodamine B?

Fluorescence Quantum Yield Standards

Quantum Yield [Q.Y.] Standards Q.Y.[%] Excitation [nm]
Quinine Sulfate 58 350
Rhodamine 101 100 450
Rhodamine 6G 95 488
Rhodamine B 31 514

What is the extinction coefficient of fluorescein?

70,000 cm-1M-1
The molar extinction coefficient (ε) for Fluorescein is 70,000 cm-1M-1.

What wavelength is rhodamine?

Fluorescence. The fluorescence emission spectrum of Rhodamine B dissolved in ethanol. The excitation wavelength was 510nm. The quantum yield of this molecule is 0.7 (López-Arbeloa, 1989).

What is the use of Rhodamine B?

As one of the most commonly used dyes, Rhodamine B (RhB) is widely used in industrial purposes, such as printing and dyeing in textile, paper, paints, leathers etc. However, the organic dyes will cause serious environmental and biological problems, even capable to induce irritation to the skin, eyes.

What is Rhodamine B dye?

Description. Rhodamine B is an organic chloride salt having N-[9-(2-carboxyphenyl)-6-(diethylamino)-3H-xanthen-3-ylidene]-N-ethylethanaminium as the counterion. An amphoteric dye commonly used as a fluorochrome. It has a role as a fluorochrome, a fluorescent probe and a histological dye.

Which Colour is Rhodamine B?

Rhodamine B is bright-red in color. Rhodamine B is a xanthene dye, which functions as a water tracer fluorescent. It is used as a staining fluorescent dye.

What is the peak absorption wavelength of a fluorescein solution at pH 7?

Absorbance and fluorescence spectra were recorded in 10 mm pathlength cuvettes. Results: At pH 7.5-8.5, the main NaF absorbance in dilute solution (0.005% w/v, or c. 13 microM) is at 490 nm, but this peak shifts progressively to 460 nm as the pH is lowered below 7.5.

What is fluorescence quantum yield?

Fluorescence quantum yield is defined as the ratio of the number of molecules that fluoresce to the total number of excited molecules, or the ratio of photons emitted to photons absorbed (see Eq.

What is the difference between rhodamine B and rhodamine 6G?

Rh. B offers a high photostable and efficient laser dye in sol–gel silica sensitized with Rh. 6G; 75,000 shots as a laser half-lifetime of the sample and 24% efficiency at pumping intensity 0.1 J/cm2 of 532 nm. Wavelength shift occurs from 606 to 630 nm in the Rh.

What is the chemical formula of Rhodamine B?

C28H31ClN2O3Rhodamine B / Formula

How do you test for Rhodamine B?

Accurate analysis techniques are necessary in order to avoid potential health risks. Merck’s Purospher® HPLC columns are ideal for the detection of Rhodamine B in chili extract. The columns offer highly reliable results, with excellent separations and outstanding peak symmetry.

How do you make Rhodamine B?

Stock Standard 1 Dissolve 0.01 g of rhodamine B standard in 10 mL of DI water. The concentration of Stock Standard 1 will be 1000 μg/mL. Stock Standard 2 Dilute 200 μL of Stock Standard 1 to 10 mL with DI water. The concentration of Stock Standard 2 will be 20 μg/mL.

What is the formula for rhodamine B?

RhodamineB Xanthylium, 9- (2-carboxyphenyl)-3,6-bis (diethylamino)-, chloride (1:1) (9- (o-Carboxyphenyl)-6- (diethylamino)-3H-xanthen-3-ylidene) diethylammonium chloride Rhodamine B, 98+%, pure

Does Rhodamine B toxicity differ between animals and controls?

There were no significant differences between treated animals and controls in ophthalmology. Chronic toxicity and oncogenicity were evaluated in male and female Charles River CD-1 mice (60/sex/group) exposed orally to rhodamine b in the diet at 0, 0.005, 0.02, and 0.10% for approximately 22 and 25 months for the males and females respectively.

What is the adsorption constant of rhodamine B?

The adsorption constant of dye to cells for Rhodamine B was 6.86 cal/mol (adsorptive affinity in Langmuir’s equation) and 2.86 (for the constant K in Freundlich’s equation). Melting temperature values for Rhodamine B calf thymus

What is Lissamine Rhodamine B sulfonyl hydrazine?

Lissamine rhodamine B sulfonyl hydrazine is a hydrazide derivative of sulforhodamine B that can spontaneously react with aldehyde- or ketone- containing molecules to form a covalent, hydrazone linkage (Figure 10.19 ).