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Quantum Yield of Fluorescence Calculator

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Fluoroscence and Phosphorescence Quantum Yield and Singlet Llifetime

✖Rate Constant of Fluoroscence is the rate at which spontaneous emission occurs.ⓘ Rate Constant of Fluoroscence [K_f]			+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%

✖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.ⓘ Quantum Yield of Fluorescence [φ_fl]

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Quantum Yield of Fluorescence Solution

STEP 0: Pre-Calculation Summary

Formula Used

Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing)
φ_fl = K_f/(K_f+R_IC+K_ISC)
This formula uses 4 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 Constant of Fluoroscence - (Measured in Hertz) - Rate Constant of Fluoroscence is the rate at which spontaneous emission occurs.
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.

STEP 1: Convert Input(s) to Base Unit

Rate Constant of Fluoroscence: 750 Revolution per Second --> 750 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)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

φ_fl = K_f/(K_f+R_IC+K_ISC) --> 750/(750+25+64000)

Evaluating ... ...

φ_fl = 0.0115785411038209

STEP 3: Convert Result to Output's Unit

0.0115785411038209 --> No Conversion Required

FINAL ANSWER

0.0115785411038209 ≈ 0.011579 <-- Quantum Yield of Fluorescence

(Calculation completed in 00.004 seconds)

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Home » Chemistry » Physical Chemistry » Physical spectroscopy » Emission Spectroscopy » Quantum Yield of Fluorescence

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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)

Quantum Yield of Fluorescence Formula

LaTeX Go

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

What is Quantum Yield ?

The quantum yield (Φ) 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.

How to Calculate Quantum Yield of Fluorescence?

Quantum Yield of Fluorescence calculator uses Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing) to calculate the Quantum Yield of Fluorescence, The Quantum Yield of Fluorescence is the ratio of photons absorbed to photons emitted through fluorescence. In other words the quantum yield gives the probability of the excited state being deactivated by fluorescence rather than by another, non-radiative mechanism. Quantum Yield of Fluorescence is denoted by φ_fl symbol.

How to calculate Quantum Yield of Fluorescence using this online calculator? To use this online calculator for Quantum Yield of Fluorescence, enter Rate Constant of Fluoroscence (K_f), Rate of Internal Conversion (R_IC) & Rate Constant of Intersystem Crossing (K_ISC) and hit the calculate button. Here is how the Quantum Yield of Fluorescence calculation can be explained with given input values -> 0.011579 = 750/(750+25+64000).

FAQ

What is Quantum Yield of Fluorescence?

The Quantum Yield of Fluorescence is the ratio of photons absorbed to photons emitted through fluorescence. In other words the quantum yield gives the probability of the excited state being deactivated by fluorescence rather than by another, non-radiative mechanism and is represented as φ_fl = K_f/(K_f+R_IC+K_ISC) or Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing). Rate Constant of Fluoroscence is the rate at which spontaneous emission occurs, 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.

How to calculate Quantum Yield of Fluorescence?

The Quantum Yield of Fluorescence is the ratio of photons absorbed to photons emitted through fluorescence. In other words the quantum yield gives the probability of the excited state being deactivated by fluorescence rather than by another, non-radiative mechanism is calculated using Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing). To calculate Quantum Yield of Fluorescence, you need Rate Constant of Fluoroscence (K_f), Rate of Internal Conversion (R_IC) & Rate Constant of Intersystem Crossing (K_ISC). With our tool, you need to enter the respective value for Rate Constant of Fluoroscence, Rate of Internal Conversion & Rate Constant of Intersystem Crossing 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 Constant of Fluoroscence, Rate of Internal Conversion & Rate Constant of Intersystem Crossing. We can use 2 other way(s) to calculate the same, which is/are as follows -

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

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