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)
φfl = Krad/(Krad+RIC+KISC+Kq)
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
φfl = Krad/(Krad+RIC+KISC+Kq) --> 10/(10+25+64000+6)
Evaluating ... ...
φfl = 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 00.020 seconds)

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25 Emission Spectroscopy Calculators

Intensity of Fluorescence given Degree of Exciplex Formation
Go Fluorosence Intensity given Degree of Exciplex = Rate Constant of Fluoroscence*Equilibrium Constant for Coordinate Complexes*(1-Degree of Exciplex Formation)/(Rate Constant of Fluoroscence+Rate Constant of Non Radiative Reaction)
Degree of Exciplex Formation
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))
Fluoroscence Quantum Yield given Phosphorescence Quantum Yield
Go Fluorosecence Quantum Yield given Ph = Phosphosecence Quantum Yield*((Rate Constant of Fluoroscence*Singlet State Concentration)/(Phosphorescence Rate Constant*Concentration of Triplet State))
Fluorosence Intensity at Low Concentration of Solute
Go Fluorosence Intensity at Low Concentration = Fluorosecence Quantum Yield*Initial Intensity*2.303*Spectroscopical Molar Extinction Coefficient*Concentration at Time t*Length
Fluorescence Quantum Yield
Go Quantum Yield of Fluorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate of Internal Conversion+Rate Constant of Intersystem Crossing+Quenching Constant)
Initial Intensity given Degree of Exciplex Formation
Go Initial Intensity given Degree of Exciplex = Rate Constant of Fluoroscence*Equilibrium Constant for Coordinate Complexes/(Rate Constant of Fluoroscence+Rate Constant of Non Radiative Reaction)
Intensity Ratio
Go Intensity Ratio = 1+(Quencher Concentration given Degree of Exciplex*(Quenching Constant/(Rate Constant of Fluoroscence+Rate Constant of Non Radiative Reaction)))
Quantum Yield of Fluorescence
Go Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing)
Singlet Life Time of Radiative Process
Go Singlet Life time of Radiative Process = ((Initial Intensity/Fluorosence Intensity)-1)/(Quenching Constant*Quencher Concentration given Degree of Exciplex)
Fluoroscence Intensity without Quenching
Go Intensity Without Quenching = (Rate Constant of Fluoroscence*Absorption Intensity)/(Rate Constant of Non Radiative Reaction+Rate Constant of Fluoroscence)
Final Intensity using Stern Volmer Equation
Go Final Intensity = Initial Intensity/ (1+(Singlet Life time given Degree of Exciplex*Quenching Constant*Quencher Concentration given Degree of Exciplex))
Fluoroscence Intensity
Go Fluorosence Intensity = (Rate Constant of Fluoroscence*Absorption Intensity)/(Rate Constant of Fluoroscence+Rate Constant of Non Radiative Reaction)
Singlet Life Time
Go Singlet Life time = 1/(Rate Constant of Intersystem Crossing+Rate of Radiative Reaction+Rate of Internal Conversion+Quenching Constant)
Collisional Energy Transfer
Go Rate of Collisional Energy Transfer = Quenching Constant*Quencher Concentration given Degree of Exciplex*Singlet State Concentration
Rate of Deactivation
Go Rate of Deactivation = (Rate Constant of Non Radiative Reaction+Rate Constant of Fluoroscence)*Singlet State Concentration
Quenching Concentration given Degree of Exciplex Formation
Go Quencher Concentration given Degree of Exciplex = ((1/(1-Degree of Exciplex Formation))-1)*(1/Equilibrium Constant for Coordinate Complexes)
Quenching Concentration
Go Quencher Concentration = ((Initial Intensity/Fluorosence Intensity)-1)/Stern Volmner Constant
Singlet Life given Degree of Exciplex Formation
Go Singlet Life time given Degree of Exciplex = 1/(Rate Constant of Fluoroscence+Rate Constant of Non Radiative Reaction)
Rate of Phosphorescence
Go Phosphorescence Rate = Phosphorescence Rate Constant*Concentration of Triplet State
ISC Rate Constant
Go Rate Constant of ISC = Rate of Intersystem Crossing*Singlet State Concentration
Fluorescence Rate Constant
Go Rate Constant of Fluoroscence = Rate of Fluoroscence/Singlet State Concentration
Rate of Activation
Go Rate of Activation = Equilibrium Constant*(1-Degree of Dissociation of Emission)
Difference in Acidity between Ground and Excited State
Go Difference in pka = pKa of Excited State-pKa of Ground State
Equilibrium Constant for Exciplex Formation
Go Equilibrium Constant for Coordinate Complexes = 1/(1-Degree of Exciplex Formation)-1
Singlet Radiative Phosphorescence Lifetime
Go Singlet Radiative Phosphorescence Lifetime = 1/Rate of Phosphorescence

13 Quantum Yield and Singlet Llifetime Calculators

Phosphorescence Quantum Yield given Triplet Triplet Annhilation Constant
Go Phosphosecence Quantum Yield given TTA Constant = (Phosphorescence Rate Constant*ISC Quantum Yield)/(Phosphorescence Rate Constant+Rate Constant of Intersystem Crossing+Rate Constant of Triplet Triplet Anhilation)
Phosphorescence Quantum Yield given Intersystem Quantum Yield
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))
Phosphorescence Quantum Yield given Fluoroscence Quantum Yield
Go Phosphorescence Quantum Yield given φf = Fluorosecence Quantum Yield*((Phosphorescence Rate Constant*Concentration of Triplet State)/(Rate Constant of Fluoroscence*Singlet State Concentration))
Fluoroscence Quantum Yield given Phosphorescence Quantum Yield
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
Go 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
Go Quantum Yield of Fluorescence = Rate Constant of Fluoroscence/(Rate Constant of Fluoroscence+Rate of Internal Conversion+Rate Constant of Intersystem Crossing)
Singlet Life Time of Radiative Process
Go Singlet Life time of Radiative Process = ((Initial Intensity/Fluorosence Intensity)-1)/(Quenching Constant*Quencher Concentration given Degree of Exciplex)
Singlet Life Time
Go Singlet Life time = 1/(Rate Constant of Intersystem Crossing+Rate of Radiative Reaction+Rate of Internal Conversion+Quenching Constant)
Phosphorescence Quantum Yield
Go Quantum Yield of Phosphorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate Constant of Non Radiative Reaction)
Triplet State Quantum yield
Go Quantum Yield of Triplet State = (Rate Constant of Intersystem Crossing*Singlet State Concentration)/Absorption Intensity
Singlet Life given Degree of Exciplex Formation
Go Singlet Life time given Degree of Exciplex = 1/(Rate Constant of Fluoroscence+Rate Constant of Non Radiative Reaction)
Singlet Radiative Fluorescence Lifetime
Go Singlet Radiative Fluorescence Lifetime = 1/Rate Constant of Fluoroscence
Singlet Radiative Phosphorescence Lifetime
Go Singlet Radiative Phosphorescence Lifetime = 1/Rate of Phosphorescence

Fluorescence Quantum Yield Formula

Quantum Yield of Fluorescence = Rate of Radiative Reaction/(Rate of Radiative Reaction+Rate of Internal Conversion+Rate Constant of Intersystem Crossing+Quenching Constant)
φfl = Krad/(Krad+RIC+KISC+Kq)

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 φfl 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 (Krad), Rate of Internal Conversion (RIC), Rate Constant of Intersystem Crossing (KISC) & Quenching Constant (Kq) 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 φfl = Krad/(Krad+RIC+KISC+Kq) 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 (Krad), Rate of Internal Conversion (RIC), Rate Constant of Intersystem Crossing (KISC) & Quenching Constant (Kq). 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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