Results and Discussion - New Synthetic Routes to Polyoxometalate Containing Ionic Liquids - page 75

bathochromic shift has occurred and the d Æ d transition peak is now clearly separated
at a wavelength of 405 nm. Photolysis of the reaction mixture leads to a further strong
batochromic shift. Two absorption peaks are found at 617 and 889 nm (see Figure 40
right part).

1.2

285 nm

1.0

0.8

0.6

0.4

0.2

0.0

200 300 400 500 600 700 800

Wavelength O (nm)

before photolysis
after photolysis for 6 h
5 min after photolysis
10 min after photolysis
15 min after photolysis
20 min after photolysis
25 min after photolysis
30 min after photolysis

0.5

0.4 40 5 nm

0.3

0.2

889 nm

617 nm

0.1

0.0

400 600 800 1000

Wavelength O (nm)