Abstract: The substituent effects of a series of carbostyrils (2-quinolones)
on absorption and fluorescence spectra have been studied.
Furthermore the experimental results are completed by theoretical
calculations using semiempirical molecuar orbital methods (AM1 and ZINDO)
to help in the design of suited compounds with long wavelength
absorbing and/or emitting compounds. The results show that donor
substituents in position 6 have a more pronounced bathochromic
shift than in position 7. The presence of 7-methoxy group enhances
significantly the absorption intensity.
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