Vibronic properties of 2-azaanthracene and its derivatives

Synthesis of Anthracene and Azaanthracene Fluorophores via [2+2+2] Cyclotrimerization Reactions

“…More drastic changes in fluorescence emission were visually observed in other nonpolar solvents such as CH 2 Cl 2 and toluene (see Supporting Information, Figures S2 and S3); however, these solvents were incompatible with the 96-well microtiter plates employed in the fluorescence measurements. This phenomenon has previously been investigated for 2-azaanthracene ( 20 ), finding that a polar solvent causes a broadening of the π → π 1 * energy levels resulting in a bathochromic shift . A loss of solvent sensitivity was observed upon quaternization of the nitrogen center in 26−31 , and a moderate broadening of the emission spectrum occurred when compared to the non-quaternized analogs (Figure A).…”

Fluorescence Studies of Amine-substituted Azaanthracene Metal Complexes

“…It was waived to investigate the fluorescence properties of 12 since the methyl group at the 9-position should not alter the spectra significantly as well as its selectivity towards the selected metal ions. [26,110] It was of greater interest to study the sensing abilities of the acridine derivatives substituted with different amines which is furthermore investigated in the next chapters.…”