# Question 19.4: Thomaz and Stevens (in Molecular Luminescence, New York: W. ...

Thomaz and Stevens (in Molecular Luminescence, New York: W. A. Benjamin Inc, 1969) studied the fluorescence quenching of pyrene in solution. Using the following information, determine $k_{f}$ and $k_{q}$ for pyrene in the presence of the quencher $Br_{6}C_{6}$.

 $\left[ Br_{6}C_{6} \right]\left( M \right)$ $\tau_{f}\left( s \right)$ 0.0005 $2.66×10^{-7}$ 0.001 $1.87×10^{-7}$ 0.002 $1.17×10^{-7}$ 0.003 $8.50×10^{-8}$ 0.005 $5.51×10^{-8}$
The "Step-by-Step Explanation" refers to a detailed and sequential breakdown of the solution or reasoning behind the answer. This comprehensive explanation walks through each step of the answer, offering you clarity and understanding.
Our explanations are based on the best information we have, but they may not always be right or fit every situation.
The blue check mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.

Question: 19.6

## The reactant 1,3-cyclohexadiene can be photochemically converted to cis hexatriene. In an experiment, 2.5 mmol of cyclohexadiene are converted to cis-hexatriene when irradiated with 100. W of 280. nm light for 27.0 s. All of the light is absorbed by the sample. What is the overall quantum ...

First, the total photon energy absorbed by the sam...
Question: 19.7

## The experimental results presented earlier demonstrate that a maximum in the rate constant for electron transfer (∼2.0×10^9 s-¹) occurs when -ΔG°=1.20 eV. Given this observation, estimate the rate constant for electron transfer when 2-naphthoquinoyl is employed as the acceptor for which -ΔG°=1.93 ...

The rate constant for electron transfer is predict...
Question: 19.3

## Consider the following reaction of methane with molecular chlorine:CH4(g)+Cl2(g)→CH3CHcl(g)+HCl(g)Experimental studies have shown that the rate law for this reaction is one-half order with respect to Cl2. Is the following mechanism consistent with this behavior? Cl2→2Cl·Cl·+CH4→HCl+CH3·CH3·+Cl2→ ...

The rate of reaction in terms of product HC...
Question: 19.5

## You are designing a FRET experiment to determine the magnitude of the structural change introduced by substrate binding to an enzyme. Using site specific mutagenesis, you have constructed a mutant form of the enzyme that possesses a single tyrosine residue and a single tryptophan residue, and ...

Using the initial separation distance and r...
Question: 19.2

## The following data were obtained for the adsorption of Kr on charcoal at 193.5 K. Using the Langmuir model, construct the adsorption isotherm, and determine Vm and the equilibrium constant for adsorption/desorption. ...

The Lineweaver–Burk plot of the rate^{-1}[/...