Pt/Pd–Ethynyl Bond Containing Fluorescent Molecular Architectures as Sensors for Nitroaromatics - Molecular Self-Assembly: Advances and Applications - page 281

The nanoscopic prism 17 showed absorptions at 275 and 368 nm.

×

-5

in DMF showed peaks at
283 and 365 nm (denoted by green line in Fig. 9.17). The peak at 365
nm was due to the metal-to-ligand (

The spectrum of 1.5 10 M solution of 18

charge transfer, whereas the
peak at 283 nm was assigned to the π-π

16)

*

transition. For complex

21 peaks at 421 and 398 nm corresponding to the anthracene part

were observed, whereas the peak at 309 nm was attributed to the
platinum-to-ligand ( ) charge transfer (denoted by red line in Fig.

9.17). In case of complex

20

-6

23 the absorption spectrum of 3 × 10

M solution in DMF showed peaks at 430 and 383 nm, which were
originated from the anthracene moiety of

, whereas the peak at
270 nm corresponds to the metal-to-ligand (

1

22 ) charge transfer

(denoted by black line in Fig. 9.17).

1

H and 31 P { 1 H} (inset) NMR spectra of the prism Figure 9.16

(the blue and red squares represent the peaks corresponding
to acceptor and donor units in the prism, respectively).

23 in CDCl 3

showed fluorescent behavior upon
excitation at 400 nm and emitted in the range 400-500 nm (see
Table 9.1). The fluorescent spectra of these complexes were recorded
in DMF solutions (Fig. 9.18).

Complexes 18 , 21 , and 23