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Absorption and fluorescence spectra of benzo-[g, h, i,]-perylene, C22H12

1969; Elsevier BV; Volume: 29; Issue: 1-3 Linguagem: Inglês

10.1016/0022-2852(69)90121-0

1096-083X

T. Kajiwara, Ichimin Shirotani, Hiroo Inokuchi, Satoshi Iwashima,

Photochemistry and Electron Transfer Studies

Benzo-[g, h, i]-perylene of a commercially available grade contained a small amount of perylene, about 10−3 mole/mole, as impurity even after careful purification, caused by the similarity of their physical properties. The concentration of perylene,in benzo-[g, h, i]-perylene was decreased to less than 10−6 mole/mole through a newly developed purification method. The absorption spectra of the pure sample in benzene solution had no weak band at 436 mμ (2.29 × 104 cm−1), which was assigned to perylene. The fluorescence spectrum of solid benzo-[g, h, i]-perylene, a broad weak band with a maximum at 470 mμ (2.13 × 104 cm−1), was very different from that of the impure hydrocarbon. The fluorescence spectra of solid film at low temperature were very intense and had vibrational structures.