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Fluorescence Quantum Yield Calculator

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Fluoroscence and Phosphorescence Quantum Yield and Singlet Llifetime

✖Rate of Radiative Reaction is the rate of light emission per unit carrier concentration, or radiative rate.ⓘ Rate of Radiative Reaction [K_rad]			+10% -10%
✖Rate of Internal Conversionis the difference between the total and the radiative one.ⓘ Rate of Internal Conversion [R_IC]			+10% -10%
✖Rate Constant of Intersystem Crossing is the rate of decay from excited singlet electronic state to triplet state.ⓘ Rate Constant of Intersystem Crossing [K_ISC]			+10% -10%
✖Quenching Constant is the measure of quenching which decreases fluoroscene intensity.ⓘ Quenching Constant [K_q]			+10% -10%

✖Quantum Yield of Fluorescence is a measure of the efficiency of photon emission as defined by the ratio of the number of photons emitted to the number of photons absorbed.ⓘ Fluorescence Quantum Yield [φ_fl]

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Fluorescence Quantum Yield Solution

STEP 0: Pre-Calculation Summary

Formula Used

Quantum Yield of Fluorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate of Internal Conversion+Rate Constant of Intersystem Crossing+Quenching Constant)
φ_fl = K_rad/(K_rad+R_IC+K_ISC+K_q)
This formula uses 5 Variables

Variables Used

Quantum Yield of Fluorescence - Quantum Yield of Fluorescence is a measure of the efficiency of photon emission as defined by the ratio of the number of photons emitted to the number of photons absorbed.
Rate of Radiative Reaction - (Measured in Hertz) - Rate of Radiative Reaction is the rate of light emission per unit carrier concentration, or radiative rate.
Rate of Internal Conversion - (Measured in Hertz) - Rate of Internal Conversionis the difference between the total and the radiative one.
Rate Constant of Intersystem Crossing - (Measured in Hertz) - Rate Constant of Intersystem Crossing is the rate of decay from excited singlet electronic state to triplet state.
Quenching Constant - (Measured in Hertz) - Quenching Constant is the measure of quenching which decreases fluoroscene intensity.

STEP 1: Convert Input(s) to Base Unit

Rate of Radiative Reaction: 10 Revolution per Second --> 10 Hertz (Check conversion here)
Rate of Internal Conversion: 25 Revolution per Second --> 25 Hertz (Check conversion here)
Rate Constant of Intersystem Crossing: 64000 Revolution per Second --> 64000 Hertz (Check conversion here)
Quenching Constant: 6 Revolution per Second --> 6 Hertz (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

φ_fl = K_rad/(K_rad+R_IC+K_ISC+K_q) --> 10/(10+25+64000+6)

Evaluating ... ...

φ_fl = 0.000156149966427757

STEP 3: Convert Result to Output's Unit

0.000156149966427757 --> No Conversion Required

FINAL ANSWER

0.000156149966427757 ≈ 0.000156 <-- Quantum Yield of Fluorescence

(Calculation completed in 00.004 seconds)

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< Emission Spectroscopy Calculators

Degree of Exciplex Formation

LaTeX Go Degree of Exciplex Formation = (Equilibrium Constant for Coordinate Complexes*Quencher Concentration given Degree of Exciplex)/(1+(Equilibrium Constant for Coordinate Complexes*Quencher Concentration given Degree of Exciplex))

Collisional Energy Transfer

LaTeX Go Rate of Collisional Energy Transfer = Quenching Constant*Quencher Concentration given Degree of Exciplex*Singlet State Concentration

Difference in Acidity between Ground and Excited State

LaTeX Go Difference in pka = pKa of Excited State-pKa of Ground State

Equilibrium Constant for Exciplex Formation

LaTeX Go Equilibrium Constant for Coordinate Complexes = 1/(1-Degree of Exciplex Formation)-1

< Quantum Yield and Singlet Llifetime Calculators

Phosphorescence Quantum Yield given Intersystem Quantum Yield

LaTeX Go Phosphorescence Quantum Yield given ISC = (Phosphorescence Rate Constant/Absorption Intensity)*(((Absorption Intensity*Triplet State Quantum Yield)/Rate Constant of Triplet Triplet Anhilation)^(1/2))

Fluoroscence Quantum Yield given Phosphorescence Quantum Yield

LaTeX Go Fluorosecence Quantum Yield given Ph = Phosphosecence Quantum Yield*((Rate Constant of Fluoroscence*Singlet State Concentration)/(Phosphorescence Rate Constant*Concentration of Triplet State))

Fluorescence Quantum Yield

LaTeX Go Quantum Yield of Fluorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate of Internal Conversion+Rate Constant of Intersystem Crossing+Quenching Constant)

Phosphorescence Quantum Yield

LaTeX Go Quantum Yield of Phosphorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate Constant of Non Radiative Reaction)

Fluorescence Quantum Yield Formula

LaTeX Go

What is singlet and triplet state?

Singlet state: All electrons in the molecule are spin paired. It is called a singlet because there is only one possible orientation in space. Triplet state: One set of electron spins is unpaired. It is called a triplet because there are three possible orientations in space with respect to the axis.

How to Calculate Fluorescence Quantum Yield?

Fluorescence Quantum Yield calculator uses Quantum Yield of Fluorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate of Internal Conversion+Rate Constant of Intersystem Crossing+Quenching Constant) to calculate the Quantum Yield of Fluorescence, The Fluorescence Quantum Yield formula is defined as the ratio of photons absorbed to photons emitted through fluorescence. Quantum Yield of Fluorescence is denoted by φ_fl symbol.

How to calculate Fluorescence Quantum Yield using this online calculator? To use this online calculator for Fluorescence Quantum Yield, enter Rate of Radiative Reaction (K_rad), Rate of Internal Conversion (R_IC), Rate Constant of Intersystem Crossing (K_ISC) & Quenching Constant (K_q) and hit the calculate button. Here is how the Fluorescence Quantum Yield calculation can be explained with given input values -> 0.000156 = 10/(10+25+64000+6).

FAQ

What is Fluorescence Quantum Yield?

The Fluorescence Quantum Yield formula is defined as the ratio of photons absorbed to photons emitted through fluorescence and is represented as φ_fl = K_rad/(K_rad+R_IC+K_ISC+K_q) or Quantum Yield of Fluorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate of Internal Conversion+Rate Constant of Intersystem Crossing+Quenching Constant). Rate of Radiative Reaction is the rate of light emission per unit carrier concentration, or radiative rate, Rate of Internal Conversionis the difference between the total and the radiative one, Rate Constant of Intersystem Crossing is the rate of decay from excited singlet electronic state to triplet state & Quenching Constant is the measure of quenching which decreases fluoroscene intensity.

How to calculate Fluorescence Quantum Yield?

The Fluorescence Quantum Yield formula is defined as the ratio of photons absorbed to photons emitted through fluorescence is calculated using Quantum Yield of Fluorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate of Internal Conversion+Rate Constant of Intersystem Crossing+Quenching Constant). To calculate Fluorescence Quantum Yield, you need Rate of Radiative Reaction (K_rad), Rate of Internal Conversion (R_IC), Rate Constant of Intersystem Crossing (K_ISC) & Quenching Constant (K_q). With our tool, you need to enter the respective value for Rate of Radiative Reaction, Rate of Internal Conversion, Rate Constant of Intersystem Crossing & Quenching Constant and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Quantum Yield of Fluorescence?

In this formula, Quantum Yield of Fluorescence uses Rate of Radiative Reaction, Rate of Internal Conversion, Rate Constant of Intersystem Crossing & Quenching Constant. We can use 2 other way(s) to calculate the same, which is/are as follows -

Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing)
Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing)

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