Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Question
Chapter 15, Problem 15.4QAP
Interpretation Introduction
(a)
Interpretation:
The compound which has greater fluorescence quantum yield from the following should be selected:
Concept introduction:
There are different cases to check the magnitude of fluorescence quantum yield of the compound. Any compound having these cases will surely have greater fluorescence quantum yield.
Interpretation Introduction
(b)
Interpretation:
The compound which has greater fluorescence quantum yield from the following should be selected:
Concept introduction:
There are different scenarios to check whether the magnitude of fluorescence quantum yield of a compound is more or less. Any compound containing these scenarios will surely have more fluorescence quantum yield.
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What factors influence the wavelength of maximum emission and maximum excitation in fluorescence spectroscopy?
Which of the following is true about fluorescence intensity of the molecule?
I Fluorescence is observed in planar molecules and its intensity increase with an increase in the number of aromatic rings
II When zinc is added to a hydroxyl quinoline solution the fluorescence intensity increased due to the formation of a complex which
increases the rigidity of the molecule.
III On increasing the intensity of the incident radiation the fluorescence intensity increases
IV On increasing the concentration of the fluorigenic molecule, the fluorescence intensity increases. A plot of intensity vs concentration
exhibita linear relation indefinitely in all concentration ranges.
O a. II,III,IV
O b. 1,11,1II,IV
O. I,II,III
O d. II,I,IV
O e. I,II,IV
Predict what you expect to observe in the EPRspectrum of a species in which an unpaired electroninteracts with one 14N nucleus (I = 1) and one 1Hnucleus (I = 1/2) if the hyperfine coupling constantsare (a) A(14N) = A(1H)=30 G; (b) A(14N)= 30 G,A(1H)= 10 G.
Chapter 15 Solutions
Principles of Instrumental Analysis
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