Question

1. Label the first two exciton peaks marked by the arrows in the CdSe nanocrystal absorption spectrum on the left, and draw in the corresponding electron transitions on the energy diagram to the right. Intensity (a.u.) Wavelength (nm) 650 600 550 500 450 400 ???(eV) $\bar{a}$ (Å) 40 35 30 28 26 24 22 20 1.5 2Se 10e 1.0- 1Pe 1Se 0.5 0.5 0.0 1S$_{3/2}$ 1P$_{3/2}$ 2P$_{3/2}$ 1S$_{1/2}$ 2S$_{1/2}$ 1.0 10 15 20 25 1/a$^2$x10$^4$(Å$^2$) 1.8 2.1 2.4 2.7 3.0 3.3 Energy (eV)

          1. Label the first two exciton peaks marked by the arrows in the CdSe nanocrystal absorption
spectrum on the left, and draw in the corresponding electron transitions on the energy diagram
to the right.
Intensity (a.u.)
Wavelength (nm)
650 600 550 500 450 400
???(eV)
$\bar{a}$ (Å)
40 35 30 28 26 24 22 20
1.5
2Se
10e
1.0-
1Pe
1Se
0.5
0.5
0.0
1S$_{3/2}$
1P$_{3/2}$
2P$_{3/2}$
1S$_{1/2}$
2S$_{1/2}$
1.0
10
15
20
25
1/a$^2$x10$^4$(Å$^2$)
1.8 2.1 2.4 2.7 3.0 3.3
Energy (eV)

1. Label the first two exciton peaks marked by the arrows in the CdSe nanocrystal absorption
spectrum on the left, and draw in the corresponding electron transitions on the energy diagram
to the right.
Intensity (a.u.)
Wavelength (nm)
650 600 550 500 450 400
???(eV)
a̅ (Å)
40 35 30 28 26 24 22 20
1.5
2Se
10e
1.0-
1Pe
1Se
0.5
0.5
0.0
1S3/2
1P3/2
2P3/2
1S1/2
2S1/2
1.0
10
15
20
25
1/a^2x10^4(Å^2)
1.8 2.1 2.4 2.7 3.0 3.3
Energy (eV)

Added by William G.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert David Collins

07/18/2022

Step 1

Show all steps

Thanks for your feedback!

Label the first two exciton peaks marked by the arrows in the CdSe nanocrystal absorption spectrum on the left, and draw in the corresponding electron transitions on the energy diagram to the right. Wavelength (nm): 650 600 550 500 450 QA 400 40 35 30 28 26 24 22 20 2Se 10e 1.5 1.0 1Se Intensity (a.u.) 0.5 hw (eV) 0.5 1.0 3S 25 2.1 2.4 2.7 3.0 10 15 1.8 3.3 20 1/a^2x10^(-10) (A) Energy (eV)