Question: The fluorescence quantum yield for phenanthrene is 0.12, and the rate constant for the intersystem crossing from singlet to triplet is 0.260 s at

The fluorescence quantum yield for phenanthrene is 0.12, and the rate constant

The fluorescence quantum yield for phenanthrene is 0.12, and the rate constant for the intersystem crossing from singlet to triplet is 0.260 s at 77 K. Assume that no quenching and no internal conversion from the singlet state occurs. Detemine the lifetime of the singlet state (T). A) 3.4 s B) 1.4 x 107s C) 9.5 x 10s D) 7.4 s E) 9.5 s

Step by Step Solution

★★★★★

3.52 Rating (159 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

2olution fluoresconce quantum Yiekd de D 12 Rate constant of in... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Chemistry Questions!

1) Mary is a DJ and drives a late model Ford Transit van. But she'd like to drive something that makes more of a statement than a white van when she isn't working. But she doesn't want to sell the...

Singlet and triplet carbenes exhibit different properties and show markedly different chemistry. For example, a singlet carbene will add to a cis-disubstituted alkene to produce only...

Singlet carbenes add to alkenes to yield cyclopropanes. Stereochemistry is maintained, meaning that cis- and trans-substituted alkenes give cis- and trans-substituted cyclopropanes, respectively; for...

Q1. Suppose player A and player B are playing the following game. Player A can choose "Up" and "Down", while player B can choose "Left" and "Right". The payoff matrix is depicted below. Player A's...

Indicate whether each of the following statements is true or false by writing T or F in the answer column. 1. Contracts for sale can be oral or written, express or implied. 1. ___________ 2. A...

Indicate whether each of the following statements is true or false by writing T or F in the answer column. 1. The United States lacks the abundance of natural resources that many other countries...

Jean-Charles de Borda (1733-99), a contemporary of Condorcet in France, argued for a democratic system that deviates from our usual conception of majority rule. The system works as follows: Suppose...

Gonzales Manufacturing Inc. has three divisions which are operated as profit centers. Actual operating data for the divisions listed alphabetically are as follows. Instructions(a) Compute the missing...

Determine whether recording each of the following adjustments will increase (I), decrease (D), or have no effect (NE) on each of the three elements of the accounting equation....

The Atlantic Grocery chain operates in major metropolitan areas on the eastern seaboard. The stores have a no-frills approach, with low overhead and high volume. They generally buy their stock in...

A poker deck consists of fifty-two cards, representing thirteen denominations (2 through ace) and four suits (diamonds, hearts, clubs, and spades). A five-card hand is called a flush if all five...

Installment Sale Zachary Davis owns several apartment buildings in Los Angeles and has an offer from a business associate, Ace Arnold, to purchase one of the buildings on October 31, 2022. Ace does...

16. Examine the following t-bill quote. Your pointy haired boss has instructed you to purchase $1 million in these treasury bills. a. b. C. d. Ask Yield Days to Maturity Date Maturity Bid Ask Dec 31...

The setting, situation, or circumstance in which a communication occurs is its Multiple Choice channel. message. context. meaning. Prey 4 of 2 0 Next

Sodium coolant with a specific activity of 0.05 Ci/cm 3 passes through a long pipe 8 inches in diameter. By treating the pipe as a line source and ignoring attenuation in the sodium itself, estimate...

A company purchased a machine for Php110,000.At the end of ten years, the company expects to sell the machine for Php10,000and will have no further use for the machine. The machine was operated...

Circle Q ranchers, Inc. has had enough of U.S. regulations, and has moved its operations across the border into Mexico, where it is now incorporated and follows accounting regulations for publicly...

Mary Black, Nell Brown, and Louise Gray each has her own computer equipment and service retail store. In an effort to potentially reduce their costs and increase their control over supply channels,...

Would a grant of 24,000 by the state to each district be equalizing in its effect on the two districts? 2. Would a state grant of $100 per student be equalizing in its effect on the two districts?...

Which of these should be a good example of positive correlation? Group of answer choices Minutes spent exercising and blood pressure. Income and heart rate. Cholesterol and fat calories. Height and...

Based on the data questions B: The fluorescence quantum yield under the same conditions was determined to be 0.7. what is the intrinsic rate constant for radioactive fluorescence decay. Express the...

In this problem you will investigate the parameters involved in a single-molecule fluorescence experiment. Specifically, the incident photon power needed to see a single molecule with a reasonable...

QUESTION ONE 1. What does quenching mean in luminescence? [2 marks] 2. Define the quantum yield for a photochemical process (2 marks] 3. How would the quantum efficiency of fluorescence be altered...

In a fluorescence-lifetime experiment, a very short pulse of light is used to excite a sample of dansyl fluorophore. Then the intensity of the fluorescence is recorded as a function of time....

In a fluorescence-lifetime experiment, a very short pulse of light is used to excite a sample. Then the intensity of the fluorescence is recorded as a function of time. Suppose we study a dansyl...

Please for first part, Enter your answer using units of time. For part C, please enter your answer using units of distance 34 of 37 The fluorescence quantum yield under the same conditions was...