PHOTOSYNTHETIC PIGMENTS1.60.71.4CH30.61.2Soret0.51AHA0.4E0.8COOCH30.30.6 Fphytyl bacteriochlorophyll a0.20.40.10.2300400500600700800700 750 800 850 9002 (nm)2 (nm)Figure 4.7 Absorption (left) and fluorescence (right) spectra of bacteriochlorophyll a in diethyl ether.AbsorbanceCFluorescence (Arbitrary units) 6. Here we have the molecular orbital energy diagram for this chlorophyll molecule. Matchthe absorption peaks labeled in Figure 4.7 above with the transitions shown in themolecular orbital energy diagramLUMO+1LUMOHOMOНОМО-1

Wavelength of absorption is inversely proportional to the energy gap between the two levels.

Here we have the molecular orbital energy diagram for this chlorophyll molecule. Match the absorption peaks labeled in Figure 4.7 above with the transitions shown in the molecular orbital energy diagram LUMO+1 LUMO НОМО НОМО-1

Here we have the molecular orbital energy diagram for this chlorophyll molecule. Match the absorption peaks labeled in Figure 4.7 above with the transitions shown in the molecular orbital energy diagram LUMO+1 LUMO НОМО НОМО-1

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter20: Molecular Spectroscopy And Photochemistry

Section: Chapter Questions

Problem 65AP

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Question

PHOTOSYNTHETIC PIGMENTS
1.6
0.7
1.4
CH3
0.6
1.2
Soret
0.5
1
A
HA
0.4E
0.8
COOCH3
0.3
0.6 F
phytyl bacteriochlorophyll a
0.2
0.4
0.1
0.2
300
400
500
600
700
800
700 750 800 850 900
2 (nm)
2 (nm)
Figure 4.7 Absorption (left) and fluorescence (right) spectra of bacteriochlorophyll a in diethyl ether.
Absorbance
C
Fluorescence (Arbitrary units)

6. Here we have the molecular orbital energy diagram for this chlorophyll molecule. Match
the absorption peaks labeled in Figure 4.7 above with the transitions shown in the
molecular orbital energy diagram
LUMO+1
LUMO
HOMO
НОМО-1

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