Photosensitizers require high quantum yield of triplet state formation. The reason for this requirement is that...
Photosensitizers require high quantum yield of triplet state formation. The reason for this requirement is that the triplet state
A. contains very high energy
B. has relatively long lifetime
C. has many equilvalent energy states
D. can emit phosphorescence
Homework Answers
Answer )
B) Has relatively long life time.
Becase when life time of excited molecule is more. it gives time required to get react and conversion reactant to product.
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Photosensitizers require high quantum yield of triplet state
formation. The reason for this requirement is that...
A Rydberg atom is one in which an electron is in a very high excited state...
A Rydberg atom is one in which an electron is in a very high excited state (n 40 or higher). Such atoms are useful for experiments that probe the transition from quantum- mechanical behavior to classical. Furthermore, these excited states have extremely long lifetimes (i.e., the electron will stay in this high excited state for a very long time). A hydrogen atom is in the n47 state. (a) What Is the lonization energy of the atom when it is in...
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Need help with 1-3
Why does a compound in the excited triplet state undergo intersystem crossing before returning to the ground state? Describe the difference between fluorescence and phosphorescence. Why does the formation of the diimide require temperatures in excess of 200 degree C? Identify the oxidation number of chromium in each of the following chemical species (a) Cr_2 O_7 (b) Cr_2 O_3 (c) CrSO_4 (d) Cr_2 S_3 In each of the following reactions, identify the oxidizing and reducing agents....
42) How many different principal quantum numbers can be found in the ground-state electron configuration of...
42) How many different principal quantum numbers can be found in the ground-state electron configuration of nickel? A) 2 B) 3 C) 4 D) 5 E) 6
1. Given the following wavefunction for the ground state of a finite quantum well of width 2nm, g...
1. Given the following wavefunction for the ground state of a finite quantum well of width 2nm, ground state energy of E1=0.05eV -A cos(kx) and ψ,-Beax A.) Find the values of k and a (remember to keep the wavefunction continuous and smooth)[10ptsl B.) Find the normalization constants A and B (you will need to find k first of course) [10pts] C.) Determine the barrier energy from the decay constant a? [5pts D.)If the well were replaced with a semi-infinite well...
An electron that has an energy of approximately 5eV moves between infinitely high walls 1.10 nm...
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Intro to Quantum Mechanics problem: . In a harmonic oscillator a normalized "coherent" state ya(x) is...
Intro to Quantum Mechanics problem:
. In a harmonic oscillator a normalized "coherent" state ya(x) is defined in terms of the lowering operator a. by aXa(x) = a Xa(x) for some (complex) number a. /Coherent states have many applications in atomic, molecular, and optical physics, for instance lasers and Bose-Einstein condensates]. (a) Using the properties for any wavefunctions f(x) and g(x) that 00 00 if ag dx (a.f)g dx f a+g dx (a.)'g dx -00 -00 -00 calculate <x >...
1. Which of the following statements is FALSE? Homeotherms can sustain a high level of physical...
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The state cannot confine a person for public health reasons unless there is a compelling reason...
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6 -19 points 1M14 8.2.017 My Notes Suppose a hypothetical object has just four quantum states,...
6 -19 points 1M14 8.2.017 My Notes Suppose a hypothetical object has just four quantum states, with the following energies: -0.6 eV (third excited state) 1.4 eV (second excited state) 2.8 eV (first excited state) 5 eV (ground state) (a) Suppose that material containing many such objects is hit with a beam of energetic electrons that ensures that there are always some objects in all of these states. What are the six energies of photons that could be strongly emitted...
7. Radiowaves are about 1m long. Convert this to frequency, in MHz. 8. When sodium compounds...
7. Radiowaves are about 1m long. Convert this to frequency, in MHz. 8. When sodium compounds are heated in a bunsen burner flame, they emit light at a wavelength of 5890 A. If 1.0 x 10 mole of sodium atoms each emit a photon of this wavelength, how many kilojoules of energy are emitted? 9. An alpha particle of mass 4.0026 amu has a velocity of 10.0% of the speed of light. What is its de Broglie wavelength (in m)?...
A Rydberg atom is one in which an electron is in a very high excited state (n 40 or higher). Such atoms are useful for experiments that probe the transition from quantum- mechanical behavior to classical. Furthermore, these excited states have extremely long lifetimes (i.e., the electron will stay in this high excited state for a very long time). A hydrogen atom is in the n47 state. (a) What Is the lonization energy of the atom when it is in...
Need help with 1-3
Why does a compound in the excited triplet state undergo intersystem crossing before returning to the ground state? Describe the difference between fluorescence and phosphorescence. Why does the formation of the diimide require temperatures in excess of 200 degree C? Identify the oxidation number of chromium in each of the following chemical species (a) Cr_2 O_7 (b) Cr_2 O_3 (c) CrSO_4 (d) Cr_2 S_3 In each of the following reactions, identify the oxidizing and reducing agents....
42) How many different principal quantum numbers can be found in the ground-state electron configuration of nickel? A) 2 B) 3 C) 4 D) 5 E) 6
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Intro to Quantum Mechanics problem:
. In a harmonic oscillator a normalized "coherent" state ya(x) is defined in terms of the lowering operator a. by aXa(x) = a Xa(x) for some (complex) number a. /Coherent states have many applications in atomic, molecular, and optical physics, for instance lasers and Bose-Einstein condensates]. (a) Using the properties for any wavefunctions f(x) and g(x) that 00 00 if ag dx (a.f)g dx f a+g dx (a.)'g dx -00 -00 -00 calculate <x >...
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7. Radiowaves are about 1m long. Convert this to frequency, in MHz. 8. When sodium compounds are heated in a bunsen burner flame, they emit light at a wavelength of 5890 A. If 1.0 x 10 mole of sodium atoms each emit a photon of this wavelength, how many kilojoules of energy are emitted? 9. An alpha particle of mass 4.0026 amu has a velocity of 10.0% of the speed of light. What is its de Broglie wavelength (in m)?...
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