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500
20
250
10
0
0
400
700
900
1200
λ
/nm
10
6
M solution of dendrimer 11 by
Nd(CF
3
SO
3
)
3
.
Left-hand side spectra
refer to the quenching of the fluorescence of the dansyl units
in the visible region and
right-hand side spectra
to the sensitization of the NIR luminescence of
Nd
3+
Fig. 7 Spectral changes observed upon titration of a 4.2
6
P
7/2
30
25
S
1
5
D
4
20
5
D
0
T
1
(?)
15
4
F
3/2
10
2
F
5/2
4
I
13/2
5
7
F
j
4
I
j
7
F
j
8
S
2
F
7/2
4
I
15/2
S
0
0
Gd
3+
Tb
3+
Yb
3+
Nd
3+
Eu
3+
Er
3+
11
Fig. 8 Energy level diagrams for the dansyl units of dendrimer 11 and the investigated lanthanide
ions. The position of the triplet excited state of 11 is uncertain because no phosphorescence can be
observed
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