The molecule 2,2'-bipyridine (1) forms a complex with the Ru²* ion. Ruthenium(II) tris-(2,2'-bipyridyl), Ru(bipy)* (2), has a strong metal-to-ligand charge transfer (MLCT) transition (Section 14.2) at 450 nm. The quenching of the *Ru(bipy);* excited state by Fe(H,O);* in acidic solution was monitored by meas- uring emission lifetimes at 600 nm. Determine the quenching rate constant for this reaction from the following data: N. N 12,2-Bipyridine (bipy 그2+ (Fe(H,O);"]/(10-4 mol dm³) t/(10-7 s) ㅇ 1.6 4.7 9.4 6 4.05 3.37 2.96 2.17
The molecule 2,2'-bipyridine (1) forms a complex with the Ru²* ion. Ruthenium(II) tris-(2,2'-bipyridyl), Ru(bipy)* (2), has a strong metal-to-ligand charge transfer (MLCT) transition (Section 14.2) at 450 nm. The quenching of the *Ru(bipy);* excited state by Fe(H,O);* in acidic solution was monitored by meas- uring emission lifetimes at 600 nm. Determine the quenching rate constant for this reaction from the following data: N. N 12,2-Bipyridine (bipy 그2+ (Fe(H,O);"]/(10-4 mol dm³) t/(10-7 s) ㅇ 1.6 4.7 9.4 6 4.05 3.37 2.96 2.17
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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- **Ru(bipy)₃²⁺:**
#### Data
The table below displays the measured emission lifetimes as a function of the concentration of Fe(H₂O)₆³⁺:
| [Fe(H₂O)₆³⁺] (x10⁻⁴ mol dm⁻³) | 0 | 1.6 | 4.7 | 7 | 9.4 |
|---------------------------------|-----|-----|-----|-----|-----|
| t (x10⁻⁷ s) | 6 | 4.05| 3.37| 2.96| 2.17|
#### Explanation of Graphs/Diagrams
- **Chemical structures:** The chemical structure of 2,2'-bipyridine is depicted, showing two pyridine rings connected by a carbon-carbon bond. The structure of Ru(bipy)₃²⁺ is also shown, illustrating the tris-complex formed between ruthenium (II) and three 2,2'-bipyridine ligands.
The provided data should be used to calculate the quenching rate constant, which represents how efficiently the Fe(H₂O)₆³⁺ molecule quenches the excited state of Ru(bipy](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9f91f67c-9902-4555-8b1c-c3ab12dce890%2Fb9de7fb2-ae58-4967-88da-4cc242ce3999%2Fucf63ba_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Quenching of Ru(bipy)32+ Excited State by Fe(H2O)63+ in Acidic Solution
#### Overview
The molecule 2,2'-bipyridine (1) forms a complex with the Ru²⁺ ion. The complex, Ruthenium(II) tris-(2,2'-bipyridyl), designated as Ru(bipy)₃²⁺ (2), exhibits a strong metal-to-ligand charge transfer (MLCT) transition at 450 nm. The quenching of the *Ru(bipy)₃²⁺ excited state by Fe(H₂O)₆³⁺ in an acidic solution was monitored through emission lifetimes measured at 600 nm. The objective is to determine the quenching rate constant for this reaction based on the provided data.
#### Chemical Structures
- **2,2'-Bipyridine (bipy):**
- **Ru(bipy)₃²⁺:**
#### Data
The table below displays the measured emission lifetimes as a function of the concentration of Fe(H₂O)₆³⁺:
| [Fe(H₂O)₆³⁺] (x10⁻⁴ mol dm⁻³) | 0 | 1.6 | 4.7 | 7 | 9.4 |
|---------------------------------|-----|-----|-----|-----|-----|
| t (x10⁻⁷ s) | 6 | 4.05| 3.37| 2.96| 2.17|
#### Explanation of Graphs/Diagrams
- **Chemical structures:** The chemical structure of 2,2'-bipyridine is depicted, showing two pyridine rings connected by a carbon-carbon bond. The structure of Ru(bipy)₃²⁺ is also shown, illustrating the tris-complex formed between ruthenium (II) and three 2,2'-bipyridine ligands.
The provided data should be used to calculate the quenching rate constant, which represents how efficiently the Fe(H₂O)₆³⁺ molecule quenches the excited state of Ru(bipy
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