Molecular origins of commercial laser dye functionality in azacoumarins and 2-quinolones: LD 425, LD 489 and LD 473

Liu, X.; Cole, J.M.; Waddell, P.G.; Lin, T.-C.

doi:10.1107/S0108768111037311

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 8
Possible resonance structures in coumarins and 2-quinolones. Atom X represents oxygen in coumarins and nitrogen in 2-quinolones. While only the 7-position electron-donating substituent D is shown here, other substituents are likely to be attached onto this framework. It is also possible to have no substituent at the 7-position, in which case resonance state (III) is not applicable any more.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 67| Part 6| October 2011| Pages 560-568

doi:10.1107/S0108768111037311

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